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• Ubuntu-Java Installation-Topcoder-“Java not found”

  - by hakuna121

  I realized that this might be the dumbest question here, but being a total beginner as I am, I really couldn't figure it out after trying all kinds of instructions I could found on the web. Specs: Ubuntu 13.04; What I intended to do: check out the Algorithm Competition section, by clicking the second-to-left tab,located on the top-left of the page: http://community.topcoder.com/tc What I got: a pop-up saying Java not found! Java could not be automatically detected on your machine. This page will attempt to automatically install Java and Java Web Start. If the download and installation does not occur automatically, click the link below to go to the Sun website where you can download the latest version of Java. What I did: I followed instructions on this Ubuntu Documentation page: https://help.ubuntu.com/community/Java and installed OpenJDK(Java Runtime Environment/Browser plugin/SDK) through Ubuntu Software Center. Then I rebooted the system, tried the page again. But I still got the java not found pop-up described above. Question: What's missing the get this working? Thank you!

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• Java ?????????????!

  - by OTN-J Master

  OTN Japan Newsletter 5??????????????Java????!???????????Java???????!??????????????????????????????????????????????????????20?????Beginning Java EE??????????????? ?????????????????2???????1?????Java Magazine ????????????????????????????????????????????2?????????Java?????????????????????????????? ?????????????????????Java?????????????????????????????????? (Java Magaine??) ?????????????????OTN???????????????·??????????????????????????????????????Java Magazine??????????????????????OTN Japan Newsletter???????????????????????????????????????(>> OTN Japan Newsletter???????) ????????????????·?????????????????????? Java Magazine????????????????????????????????????? ??????????????????????????? ?????????????????? ??????????????????????????????????? ??oracleDB?????????????????????? ????????????? ??????????????????????????????????????? ???????????????????????????????????????????? ????Web???????????????????? ???API??????????????????????????????? Java???????????????????????????????JavaMail?GlassFish??????????? ??????????????????????????????????? ???????????????????????????????? Java???????????????????????????? ?????JavaMail???????????????????????????????????????????????????? ???API????????????? JavaFX??????????????????????????????????? ??Swing?????????????????SWT?????????????????????????????????????? ???????????????????????????????????????????????????????????? Java?????????????????????????????????????????? ?????????Web?????????????????????????????????????????????????????????? OTN????Java?????????????????????????? ??????? ??????????????????????? ???????????????????????? ??????????????? ????????????????????????????????? ??Web??xx??????yy??????????????????????????FAQ??????????????????????????? ???????????????????????????????????(?????????????????…) ????????????????????????????????????? Java????????????????????????? ????????????RSS???????????????? ??????Java?????????????????????????????????????????? ???????????????? ???????????????????????????? ???????????????? ????????????????? JAVA??????????????????????????????????????????????????????????????? ?????????????????????????????????????????????? ???Java????????????????????·??·???????????????????????? Oracle???????????????? Oracle???????????????? ?????????????????????????????????? ???????????????????????? ???????????IDE??? ????PG?????????????????????QA??? Java?Version?????????????????????????????????????????????? ??????????????????????????? SUN????????????????????????????????? ??????????Oracle?????????????????????????? ?????Java???????????????????????? ???Java?????????????????????????????·???????·?????????????????????????? Java??????????????????????????????????????????????????????? ?????????Java???????????? ???????????????????????????? ?????????????????????????????????? google?????????Java???????(?open)?????????????????????? ????????????????????????????????????? ·?????????????????????????(??????????) ·RSS????????????????????????????????? ·??????????????????????????????????????????????????? Java??????????????????????????????????????????????????????????????????????????????? ??????????????????????????????? ?????????????????????????????????????????????????????????????????????

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• Hibernate Lazy init exception in spring scheduled job

  - by Noam Nevo

  I have a spring scheduled job (@Scheduled) that sends emails from my system according to a list of recipients in the DB. This method is annotated with the @Scheduled annotation and it invokes a method from another interface, the method in the interface is annotated with the @Transactional annotation. Now, when i invoke the scheduled method manually, it works perfectly. But when the method is invoked by spring scheduler i get the LazyInitFailed exception in the method implementing the said interface. What am I doing wrong? code: The scheduled method: @Component public class ScheduledReportsSender { public static final int MAX_RETIRES = 3; public static final long HALF_HOUR = 1000 * 60 * 30; @Autowired IScheduledReportDAO scheduledReportDAO; @Autowired IDataService dataService; @Autowired IErrorService errorService; @Scheduled(cron = "0 0 3 ? * *") // every day at 2:10AM public void runDailyReports() { // get all daily reports List<ScheduledReport> scheduledReports = scheduledReportDAO.getDaily(); sendScheduledReports(scheduledReports); } private void sendScheduledReports(List<ScheduledReport> scheduledReports) { if(scheduledReports.size()<1) { return; } //check if data flow ended its process by checking the report_last_updated table in dwh int reportTimeId = scheduledReportDAO.getReportTimeId(); String todayTimeId = DateUtils.getTimeid(DateUtils.getTodayDate()); int yesterdayTimeId = Integer.parseInt(DateUtils.addDaysSafe(todayTimeId, -1)); int counter = 0; //wait for time id to update from the daily flow while (reportTimeId != yesterdayTimeId && counter < MAX_RETIRES) { errorService.logException("Daily report sender, data not ready. Will try again in one hour.", null, null, null); try { Thread.sleep(HALF_HOUR); } catch (InterruptedException ignore) {} reportTimeId = scheduledReportDAO.getReportTimeId(); counter++; } if (counter == MAX_RETIRES) { MarketplaceServiceException mse = new MarketplaceServiceException(); mse.setMessage("Data flow not done for today, reports are not sent."); throw mse; } // get updated timeid updateTimeId(); for (ScheduledReport scheduledReport : scheduledReports) { dataService.generateScheduledReport(scheduledReport); } } } The Invoked interface: public interface IDataService { @Transactional public void generateScheduledReport(ScheduledReport scheduledReport); } The implementation (up to the line of the exception): @Service public class DataService implements IDataService { public void generateScheduledReport(ScheduledReport scheduledReport) { // if no recipients or no export type - return if(scheduledReport.getRecipients()==null || scheduledReport.getRecipients().size()==0 || scheduledReport.getExportType() == null) { return; } } } Stack trace: ERROR: 2012-09-01 03:30:00,365 [Scheduler-15] LazyInitializationException.<init>(42) | failed to lazily initialize a collection of role: com.x.model.scheduledReports.ScheduledReport.recipients, no session or session was closed org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.x.model.scheduledReports.ScheduledReport.recipients, no session or session was closed at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:383) at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:375) at org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:122) at org.hibernate.collection.PersistentBag.size(PersistentBag.java:248) at com.x.service.DataService.generateScheduledReport(DataService.java:219) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) at $Proxy208.generateScheduledReport(Unknown Source) at com.x.scheduledJobs.ScheduledReportsSender.sendScheduledReports(ScheduledReportsSender.java:85) at com.x.scheduledJobs.ScheduledReportsSender.runDailyReports(ScheduledReportsSender.java:38) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:273) at org.springframework.scheduling.support.MethodInvokingRunnable.run(MethodInvokingRunnable.java:65) at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:51) at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:165) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:636) ERROR: 2012-09-01 03:30:00,366 [Scheduler-15] MethodInvokingRunnable.run(68) | Invocation of method 'runDailyReports' on target class [class com.x.scheduledJobs.ScheduledReportsSender] failed org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.x.model.scheduledReports.ScheduledReport.recipients, no session or session was closed at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:383) at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:375) at org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:122) at org.hibernate.collection.PersistentBag.size(PersistentBag.java:248) at com.x.service.DataService.generateScheduledReport(DataService.java:219) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) at $Proxy208.generateScheduledReport(Unknown Source) at com.x.scheduledJobs.ScheduledReportsSender.sendScheduledReports(ScheduledReportsSender.java:85) at com.x.scheduledJobs.ScheduledReportsSender.runDailyReports(ScheduledReportsSender.java:38) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:273) at org.springframework.scheduling.support.MethodInvokingRunnable.run(MethodInvokingRunnable.java:65) at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:51) at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:165) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:636)

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• RPi and Java Embedded GPIO: Writing Java code to blink LED

  - by hinkmond

  So, you've followed the previous steps to install Java Embedded on your Raspberry Pi ?, you went to Fry's and picked up some jumper wires, LEDs, and resistors ?, you hooked up the wires, LED, and resistor the the correct pins ?, and now you want to start programming in Java on your RPi? Yes? ???????! OK, then... Here we go. You can use the following source code to blink your first LED on your RPi using Java. In the code you can see that I'm not using any complicated gpio libraries like wiringpi or pi4j, and I'm not doing any low-level pin manipulation like you can in C. And, I'm not using python (hell no!). This is Java programming, so we keep it simple (and more readable) than those other programming languages. See: Write Java code to do this In the Java code, I'm opening up the RPi Debian Wheezy well-defined file handles to control the GPIO ports. First I'm resetting everything using the unexport/export file handles. (On the RPi, if you open the well-defined file handles and write certain ASCII text to them, you can drive your GPIO to perform certain operations. See this GPIO reference). Next, I write a "1" then "0" to the value file handle of the GPIO0 port (see the previous pinout diagram). That makes the LED blink. Then, I loop to infinity. Easy, huh? import java.io.* /* * Java Embedded Raspberry Pi GPIO app */ package jerpigpio; import java.io.FileWriter; /** * * @author hinkmond */ public class JerpiGPIO { static final String GPIO_OUT = "out"; static final String GPIO_ON = "1"; static final String GPIO_OFF = "0"; static final String GPIO_CH00="0"; /** * @param args the command line arguments */ public static void main(String[] args) { FileWriter commandFile; try { /*** Init GPIO port for output ***/ // Open file handles to GPIO port unexport and export controls FileWriter unexportFile = new FileWriter("/sys/class/gpio/unexport"); FileWriter exportFile = new FileWriter("/sys/class/gpio/export"); // Reset the port unexportFile.write(GPIO_CH00); unexportFile.flush(); // Set the port for use exportFile.write(GPIO_CH00); exportFile.flush(); // Open file handle to port input/output control FileWriter directionFile = new FileWriter("/sys/class/gpio/gpio"+GPIO_CH00+"/direction"); // Set port for output directionFile.write(GPIO_OUT); directionFile.flush(); /*--- Send commands to GPIO port ---*/ // Opne file handle to issue commands to GPIO port commandFile = new FileWriter("/sys/class/gpio/gpio"+GPIO_CH00+"/value"); // Loop forever while (true) { // Set GPIO port ON commandFile.write(GPIO_ON); commandFile.flush(); // Wait for a while java.lang.Thread.sleep(200); // Set GPIO port OFF commandFile.write(GPIO_OFF); commandFile.flush(); // Wait for a while java.lang.Thread.sleep(200); } } catch (Exception exception) { exception.printStackTrace(); } } } Hinkmond

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• NightHacking demo: Java in the Internet of Things

  - by terrencebarr

  The NightHacking session with Steven Chin was good fun. Check out the video on “Java in the Internet of Things” and a live demo of the Smart Solar Tracking System with Java ME Embedded 3.2. Real hardware and demo flakiness included See here. While you are at, have a look at some of the other NightHacking sessions and a number of other videos on the YouTube Java Channel. Cheers, – Terrence Filed under: Mobile & Embedded Tagged: "Oracle Java ME Embedded", demo, embedded, iot, Java Embedded, nighthacking, video, webcast

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• NightHacking demo: Java in the Internet of Things

  - by terrencebarr

  The NightHacking session with Steven Chin was good fun. Check out the video on “Java in the Internet of Things” and a live demo of the Smart Solar Tracking System with Java ME Embedded 3.2. Real hardware and demo flakiness included See here. While you are at, have a look at some of the other NightHacking sessions and a number of other videos on the YouTube Java Channel. Cheers, – Terrence Filed under: Mobile & Embedded Tagged: "Oracle Java ME Embedded", demo, embedded, iot, Java Embedded, nighthacking, video, webcast

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• Moving from C# to Java [closed]

  - by Mike

  I worked over 5 years as C# software developer, but last time I often think, should I learn Java platform (especially Java EE)? On job sites I see that there are much more Java jobs than .NET (financial, corporate sector) and Java salaries 20-25% higher than C#. But on the opposite side I see that job count trend for C# is growing last 7 years, but Java job trend is nearly constant. Is this fact a sign that soon situation will change and C# job became more profitable? I will be grateful for any advice or your opinion! Thank you.

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• How to get a Class literal from a generically specific Class

  - by h2g2java

  There are methods like these which require Class literals as argument. Collection<EmpInfo> emps = SomeSqlUtil.select( EmpInfo.class, "select * from emps"); or GWT.create(Razmataz.class); The problem presents itself when I need to supply generic specific classes like EmpInfo<String> Razmataz<Integer> The following would be wrong syntax Collection<EmpInfo<String>> emps = SomeSqlUtil.select( EmpInfo<String>.class, "select * from emps"); or GWT.create(Razmataz<Integer>.class); Because you cannot do syntax like Razmataz<Integer>.class So, how would I be able to squeeze a class literal out of EmpInfo<String> Razmataz<Integer> so that I could feed them as arguments to methods requiring Class literals? Further info Okay, I confess that I am asking this primarily for GWT. I have a pair of GWT RPC interface Razmataz. (FYI, GWT RPC interface has to be defined in server-client pairs). I plan to use the same interface pair for communicating whether it be String, Integer, Boolean, etc. GWT.create(Razmataz) for Razmataz<T> complains that, since I did not specify T, GWT compiler treated it as Object. Then GWT compiler would not accept Object class. It needs to be more specific than being an Object. So, it seems there is no way for me to tell GWT.create what T is because a Class literal is a runtime concept while generics is a compile time concept, Right?

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• Getting the class of an n dimensional array of an runtime supplied class name

  - by MeBigFatGuy

  Given a fully qualified class name, and a number of dimensions, i would like to get the Class name for this class. I believe i can do this like such public Class<?> getArrayClass(String className, int dimensions) throws ClassNotFoundException { Class<?> elementType = Class.forName(className); return Array.newInstance(elementType, new int[dimensions]).getClass(); } However this requires me to create an unneeded instance of the class. Is there a way to do this without creating the instance? It does not appear that Class.forName("[[[[Ljava/lang/String;") (or a algorithmically generated version) works correctly in all instances from various blog posts i've seen.

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• Returning and instance of a Class given its .class (MyClass.class)

  - by jax

  I have an enum that will hold my algorithms. I cannot instantiate these classes because I need the application context which is only available once the application has started. I want to load the class at runtime when I choose by calling getAlgorithm(Context cnx). How do I easily instantiate a class at runtime given its .class (and my constructor takes arguments)? All my classes are subclasses of Algorithm. public enum AlgorithmTypes { ALL_FROM_9_AND_LAST_FROM_10_ID(AlgorithmFactory.AlgorithmAllFrom9AndLastFrom10Impl.class), ALL_FROM_9_AND_LAST_FROM_10_CURRENCY_ID(AlgorithmFactory.AlgorithmAllFrom9AndLastFrom10Impl.class), DIVIDE_BY_9_LESS_THAN_100(AlgorithmFactory.AlgorithmAllFrom9AndLastFrom10Impl.class), TABLES_BEYOND_5_BY_5(AlgorithmFactory.AlgorithmAllFrom9AndLastFrom10Impl.class); private Class<? extends Algorithm> algorithm; AlgorithmTypes(Class<? extends Algorithm> c) { algorithm = c; } public Algorithm getAlgorithm(Context cnx) { return //needs to return the current algoriths constructor which takes the Context Algorithm(Context cnx); } }

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• UnsatisfiedLinkError on xawt when running HEC-HMS.sh

  - by G.Oxsen

  I am a recent adopter of Linux and this problem has got me stumped. I use HEC-HMS and HEC-DSSVue for work on a regular basis. I have been using the widows versions in wine but they are really buggy. So I decided to try out the linux versions. the links below will take you to the download pages for these two programs. They are free programs for Hydrology and data management. Once I install them and attempt to run the shell file (HEC-HMS.sh for example) I get a ton of java errors that I do not understand. If I had to guess I would say that the java files in question can not be found. When I check to see if java is installed it is. Here is the output from the terminal from trying to run HEC-HMS.sh: Exception in thread "Thread-1" java.lang.UnsatisfiedLinkError: /home/smythe/HEC/hec-hms35/java/lib/i386/xawt/libmawt.so: libXtst.so.6: cannot open shared object file: No such file or directory at java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.lang.ClassLoader.loadLibrary0(Unknown Source) at java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.load0(Unknown Source) at java.lang.System.load(Unknown Source) at java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.lang.ClassLoader.loadLibrary0(Unknown Source) at java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.loadLibrary0(Unknown Source) at java.lang.System.loadLibrary(Unknown Source) at sun.security.action.LoadLibraryAction.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at sun.awt.NativeLibLoader.loadLibraries(Unknown Source) at sun.awt.DebugHelper.<clinit>(Unknown Source) at java.awt.Component.<clinit>(Unknown Source) at javax.swing.ImageIcon.<clinit>(Unknown Source) at hms.i.c(Unknown Source) at hms.i.b(Unknown Source) at hms.K.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Exception in thread "Thread-4" java.lang.UnsatisfiedLinkError: /home/smythe/HEC/hec-hms35/java/lib/i386/xawt/libmawt.so: libXtst.so.6: cannot open shared object file: No such file or directory at java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.lang.ClassLoader.loadLibrary0(Unknown Source) at java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.load0(Unknown Source) at java.lang.System.load(Unknown Source) at java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.lang.ClassLoader.loadLibrary0(Unknown Source) at java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.loadLibrary0(Unknown Source) at java.lang.System.loadLibrary(Unknown Source) at sun.security.action.LoadLibraryAction.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.awt.Toolkit.loadLibraries(Unknown Source) at java.awt.Toolkit.<clinit>(Unknown Source) at sun.print.CUPSPrinter.<clinit>(Unknown Source) at sun.print.UnixPrintServiceLookup.getDefaultPrintService(Unknown Source) at sun.print.UnixPrintServiceLookup.refreshServices(Unknown Source) at sun.print.UnixPrintServiceLookup$PrinterChangeListener.run(Unknown Source) Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class java.awt.Toolkit at java.awt.Color.<clinit>(Unknown Source) at hms.model.l.<init>(Unknown Source) at hms.model.ProjectManager.<init>(Unknown Source) at hms.Hms.<init>(Unknown Source) at hms.Hms.main(Unknown Source) Exception in thread "Thread-2" java.lang.NoClassDefFoundError: Could not initialize class sun.print.CUPSPrinter at sun.print.UnixPrintServiceLookup.getDefaultPrintService(Unknown Source) at javax.print.PrintServiceLookup.lookupDefaultPrintService(Unknown Source) at hms.util.f.run(Unknown Source) at java.lang.Thread.run(Unknown Source) I get similar outputs when I try to run HEC-DSSVue.sh. If anyone could shed some light on a solution I would really appreciate it. The problem turned out to be that the program needed 32 bit versions of the particular dependencies.

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• Class design, One class in two sources

  - by Pavla

  Is it possible define methods from the same class in different "CPP" files? I have header file "myClass.h" with: class myClass { public: // methods for counting ... // methods for other ... }; I would like to define "methods for counting" in one CPP and "methods for other" in other CPP. For clarity. Both groups of methods sometime use the same attributes. Is it possible? Thanks :).

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• ~????Java???????????~ "vJUG" Worldwide Virtual JUG (???????Java???????)????????

  - by OTN-J Master

  ????????????Java????????????Java Source??Tori Wieldt???????????????????????????????????????????????????????????? (?JUG: Java User Group???????JUG???????????????????????)2013/10/28 ???:OTN Java????????? Tori Wieldt ???????Java??????????????????????????????????·????(Simon Maple)???????????????Java????????????????”vJUG"????????????????vJUG????????????? ·????????????? vJUG?????????? (??????????????!)·???????JUG????????????????JUG????????????JUG????????????·????JUG??????????????????????????·??JUG?????????????????????”??”???vJUG??????JUG????????????????????????vJUG?????????JUG????????????????????????????????????????????JUG???????????????????????????????????????????????? ??????????????????????????????????????JUG?????????????????????????????????????????????????JUG?90?????????????WebEX?Google ??????(????Web??????)???????vJUG?????????????·???????????????????????????????????????????????vJUG?????????????????????????? ·?????????????????????????????????????????·????????????????????????????????·??????????????????IRC(Internet Relay Chat)????????????(???????????????????????)·?????????????????????????????·?JUG??????(????????????JUG????)????????????????????????????????????? ·???WebEX????Google?????????????JUG?????????????????JUG?????vJUG???????????????????????????????JUG?????????????????????????????!????vJUG?????????!”vJUG???????http://www.meetup.com/virtualJUG/

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• Exception in thread "main" java.lang.NoSuchMethodError: sun/misc/Unsafe.allocateDBBMemory

  - by user2524935

  Has anyone been able to compile JRuby on a s390x Linux system? I am trying to use LogStash, which apparently requires JRuby, however SLES 11 has no JRuby repo included. jar ant produces the following. compile-annotation-binder: [javac] Compiling 18 source files to /home/user7/jruby-1.7.4/build/classes/jruby [javac] warning: [options] bootstrap class path not set in conjunction with -source 1.6 [javac] Note: /home/user7/jruby-1.7.4/src/org/jruby/util/CodegenUtils.java uses unchecked or unsafe operations. [javac] Note: Recompile with -Xlint:unchecked for details. [javac] 1 warning compile-jruby: [javac] Compiling 1395 source files to /home/user7/jruby-1.7.4/build/classes/jruby [javac] Exception in thread "main" java.lang.NoSuchMethodError: sun/misc/Unsafe.allocateDBBMemory(J)J [javac] at java.nio.DirectByteBuffer.(DirectByteBuffer.java:127) [javac] at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:306) [javac] at sun.misc.Perf.createLong(Native Method) [javac] at sun.misc.PerfCounter.(PerfCounter.java:77) [javac] at sun.misc.PerfCounter.newPerfCounter(PerfCounter.java:83) [javac] at sun.misc.PerfCounter$CoreCounters.(PerfCounter.java:140) [javac] at java.lang.J9VMInternals.initializeImpl(Native Method) [javac] at java.lang.J9VMInternals.initialize(J9VMInternals.java:236) [javac] at sun.misc.PerfCounter.getZipFileOpenTime(PerfCounter.java:194) [javac] at java.util.zip.ZipFile.(ZipFile.java:230) [javac] at java.util.zip.ZipFile.(ZipFile.java:159) [javac] at java.util.jar.JarFile.(JarFile.java:167) [javac] at java.util.jar.JarFile.(JarFile.java:104) [javac] at sun.misc.URLClassPath$JarLoader.getJarFile(URLClassPath.java:958) [javac] at sun.misc.URLClassPath$JarLoader.access$700(URLClassPath.java:826) [javac] at sun.misc.URLClassPath$JarLoader$1.run(URLClassPath.java:909) [javac] at sun.misc.URLClassPath$JarLoader$1.run(URLClassPath.java:899) [javac] at java.security.AccessController.doPrivileged(AccessController.java:280) [javac] at sun.misc.URLClassPath$JarLoader.ensureOpen(URLClassPath.java:898) [javac] at sun.misc.URLClassPath$JarLoader.(URLClassPath.java:871) [javac] at sun.misc.URLClassPath$3.rtJarLoader(URLClassPath.java:596) [javac] at sun.misc.URLClassPath$3.run(URLClassPath.java:546) [javac] at sun.misc.URLClassPath$3.run(URLClassPath.java:536) [javac] at java.security.AccessController.doPrivileged(AccessController.java:280) [javac] at sun.misc.URLClassPath.getLoader(URLClassPath.java:535) [javac] at sun.misc.URLClassPath.getLoader(URLClassPath.java:498) [javac] at sun.misc.URLClassPath.getResource(URLClassPath.java:324) [javac] at java.net.URLClassLoader$ClassFinder.run(URLClassLoader.java:1157) [javac] at java.security.AccessController.doPrivileged(AccessController.java:314) [javac] at java.net.URLClassLoader.findClass(URLClassLoader.java:594) [javac] at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:743) [javac] at java.lang.ClassLoader.loadClass(ClassLoader.java:711) [javac] at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:735) [javac] at java.lang.ClassLoader.loadClass(ClassLoader.java:711) [javac] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:325) [javac] at java.lang.ClassLoader.loadClass(ClassLoader.java:690) [javac] at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:494) BUILD FAILED /home/user7/jruby-1.7.4/build.xml:636: The following error occurred while executing this line: /home/user7/jruby-1.7.4/build.xml:289: Compile failed; see the compiler error output for details. Total time: 1 minute 37 seconds Line 636 of build.xml <target name="jar" depends="init" description="Create the jruby.jar file. Used during dev."> -> <antcall target="jar-jruby" inheritall="true"/> </target> Line 289 of build.xml <javac destdir="${jruby.classes.dir}" fork="true" debug="true" source="${javac.version}" target="${javac.version}" -> deprecation="true" encoding="UTF-8" includeantruntime="true" memorymaximumsize="${jruby.compile.memory}"> <classpath refid="jruby.execute.classpath"/> <src path="${src.dir}"/> <exclude name="org/jruby/runtime/Constants.java"/> java -version java version "1.7.0" Java(TM) SE Runtime Environment (build pxz6470sr4fp1-20130325_01(SR4 FP1)) IBM J9 VM (build 2.6, JRE 1.7.0 Linux s390x-64 Compressed References 20130306_140761 (JIT enabled, AOT enabled) J9VM - R26_Java726_SR4_FP1_20130306_1011_B140761 JIT - r11.b03_20130131_32403ifx1 GC - R26_Java726_SR4_FP1_20130306_1011_B140761_CMPRSS J9CL - 20130306_140761) JCL - 20130315_01 based on Oracle 7u13-b08 ant -version Apache Ant version 1.7.1

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• February 2011 Java SE and Java for Business Critical Patch Update Released

  - by eric.maurice

  Hello, this is Eric Maurice again. Oracle released the February 2011 Critical Patch Update for Java SE and Java for Business today. As discussed in a previous blog entry, Oracle currently maintains a separate Critical Patch Update schedule for Java SE and Java for Business because of commitments made prior to the Oracle acquisition in regards to the timing for the publication of Java fixes. Today's Java Critical Patch Update includes fixes for 21 vulnerabilities. The most severe CVSS Base Score for vulnerabilities fixed in this CPU is 10.0, and this Base Score affects 8 vulnerabilities. Out of these 21 vulnerabilities, 13 affect Java client deployments. 12 of these 13 vulnerabilities can be exploited through Untrusted Java Web Start applications and Untrusted Java Applets, which run in the Java sandbox with limited privileges. One of these 13 vulnerabilities can be exploited by running a standalone application. In addition, one of the client vulnerability affects Java Update, a Windows-specific component. 3 of the 21 vulnerabilities affect client and server deployments. These vulnerabilities can be exploited through Untrusted Java Web Start applications and Untrusted Java Applets, as well as be exploited by supplying malicious data to APIs in the specified components, such as, for example, through a web service. 3 vulnerabilities affect Java server deployments only. These vulnerabilities can be exploited by supplying malicious data to APIs in the specified Java components. Note that one of these vulnerabilities (CVE-2010-4476) was the subject of a Security Alert released on February 8th. Finally, one of these vulnerabilities is specific to Java DB, a component in the Java JDK, but not included in the Java Runtime Environment (JRE). As usual, because of the severity of the vulnerabilities fixed in this Critical Patch Update, Oracle recommends that Java customers apply it as soon as possible. The Critical Patch Advisory provides more details about the vulnerabilities addressed in the Critical Patch Update as well as instructions on how to install the fixes and where to get them. Home users should use the Java auto-update mechanism to install the latest version of the Java Runtime Environment 6 update 24 or higher (JRE), which includes the fix for this vulnerability. For More Information: The Critical Patch Updates and Security Alerts page is located at http://www.oracle.com/technetwork/topics/security/alerts-086861.html More information on Oracle Software Security Assurance is located at http://www.oracle.com/us/support/assurance/index.html Consumers can go to http://www.java.com/en/download/installed.jsp to ensure that they have the latest version of Java running on their desktops. More information on Java Update is available at http://www.java.com/en/download/help/java_update.xml

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• Class initialization issues loading java.util.LogManager in Android Dalvik VM

  - by Freddy B. Rose

  I've done changes in an Android native library and installed a new system.img file but am now getting an unrelated Error on startup. I can get past it by swallowing the error but I wanted to know if anyone can explain what the issue is. The Android implementation of Logger.java claims that it is Forcing the LogManager to be initialized since its class init code performs necessary one-time setup. But this forced initialization results in a NoClassDefFoundError. I'm thinking that it has something to do with the class not having been preloaded by Zygote yet but am not that familiar with the whole class loaders and VM business. If anyone has some insight it would be greatly appreciated. Thanks. I/Zygote ( 1253): Preloading classes... D/skia ( 1253): ------ build_power_table 1.4 D/skia ( 1253): ------ build_power_table 0.714286 W/dalvikvm( 1253): Exception Ljava/lang/StackOverflowError; thrown during Ljava/util/logging/LogManager;. W/dalvikvm( 1253): Exception Ljava/lang/NoClassDefFoundError; thrown during Ljava/security/Security;. W/dalvikvm( 1253): Exception Ljava/lang/ExceptionInInitializerError; thrown during Landroid/net/http/HttpsConnection;. E/Zygote ( 1253): Error preloading android.net.http.HttpsConnection. E/Zygote ( 1253): java.lang.ExceptionInInitializerError E/Zygote ( 1253): at java.lang.Class.classForName(Native Method) E/Zygote ( 1253): at java.lang.Class.forName(Class.java:237) E/Zygote ( 1253): at java.lang.Class.forName(Class.java:183) E/Zygote ( 1253): at com.android.internal.os.ZygoteInit.preloadClasses(ZygoteInit.java:295) E/Zygote ( 1253): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590) E/Zygote ( 1253): at dalvik.system.NativeStart.main(Native Method) E/Zygote ( 1253): Caused by: java.lang.ExceptionInInitializerError E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory$1.run(KeyManagerFactory.java:57) E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory$1.run(KeyManagerFactory.java:56) E/Zygote ( 1253): at java.security.AccessController.doPrivilegedImpl(AccessController.java:264) E/Zygote ( 1253): at java.security.AccessController.doPrivileged(AccessController.java:84) E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory.getDefaultAlgorithm(KeyManagerFactory.java:55) E/Zygote ( 1253): at org.apache.harmony.xnet.provider.jsse.SSLParameters.(SSLParameters.java:142) E/Zygote ( 1253): at org.apache.harmony.xnet.provider.jsse.SSLContextImpl.engineInit(SSLContextImpl.java:82) E/Zygote ( 1253): at android.net.http.HttpsConnection.initializeEngine(HttpsConnection.java:101) E/Zygote ( 1253): at android.net.http.HttpsConnection.(HttpsConnection.java:65) E/Zygote ( 1253): ... 6 more E/Zygote ( 1253): Caused by: java.lang.NoClassDefFoundError: java.util.logging.LogManager E/Zygote ( 1253): at java.util.logging.Logger.initHandler(Logger.java:419) E/Zygote ( 1253): at java.util.logging.Logger.log(Logger.java:1094) E/Zygote ( 1253): at java.util.logging.Logger.warning(Logger.java:906) E/Zygote ( 1253): at org.apache.harmony.luni.util.MsgHelp.loadBundle(MsgHelp.java:61) E/Zygote ( 1253): at org.apache.harmony.luni.util.Msg.getString(Msg.java:60) E/Zygote ( 1253): at java.io.BufferedInputStream.read(BufferedInputStream.java:316) E/Zygote ( 1253): at java.io.FilterInputStream.read(FilterInputStream.java:138) E/Zygote ( 1253): at java.io.BufferedInputStream.fillbuf(BufferedInputStream.java:157) E/Zygote ( 1253): at java.io.BufferedInputStream.read(BufferedInputStream.java:243) E/Zygote ( 1253): at java.util.Properties.load(Properties.java:302) E/Zygote ( 1253): at java.security.Security$1.run(Security.java:80) E/Zygote ( 1253): at java.security.Security$1.run(Security.java:67) E/Zygote ( 1253): at java.security.AccessController.doPrivilegedImpl(AccessController.java:264) E/Zygote ( 1253): at java.security.AccessController.doPrivileged(AccessController.java:84) E/Zygote ( 1253): at java.security.Security.(Security.java:66) E/Zygote ( 1253): ... 15 more W/dalvikvm( 1253): threadid=3: thread exiting with uncaught exception (group=0x2aac6170)

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• Class initialization issues loading java.util.logging.LogManager in Android Dalvik VM

  - by Freddy B. Rose

  I've done changes in an Android native library and installed a new system.img file but am now getting an unrelated Error on startup. I can get past it by swallowing the error but I wanted to know if anyone can explain what the issue is. The Android implementation of Logger.java claims that it is Forcing the LogManager to be initialized since its class init code performs necessary one-time setup. But this forced initialization results in a NoClassDefFoundError. I'm thinking that it has something to do with the class not having been preloaded by Zygote yet but am not that familiar with the whole class loaders and VM business. If anyone has some insight it would be greatly appreciated. Thanks. I/Zygote ( 1253): Preloading classes... D/skia ( 1253): ------ build_power_table 1.4 D/skia ( 1253): ------ build_power_table 0.714286 W/dalvikvm( 1253): Exception Ljava/lang/StackOverflowError; thrown during Ljava/util/logging/LogManager;. W/dalvikvm( 1253): Exception Ljava/lang/NoClassDefFoundError; thrown during Ljava/security/Security;. W/dalvikvm( 1253): Exception Ljava/lang/ExceptionInInitializerError; thrown during Landroid/net/http/HttpsConnection;. E/Zygote ( 1253): Error preloading android.net.http.HttpsConnection. E/Zygote ( 1253): java.lang.ExceptionInInitializerError E/Zygote ( 1253): at java.lang.Class.classForName(Native Method) E/Zygote ( 1253): at java.lang.Class.forName(Class.java:237) E/Zygote ( 1253): at java.lang.Class.forName(Class.java:183) E/Zygote ( 1253): at com.android.internal.os.ZygoteInit.preloadClasses(ZygoteInit.java:295) E/Zygote ( 1253): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590) E/Zygote ( 1253): at dalvik.system.NativeStart.main(Native Method) E/Zygote ( 1253): Caused by: java.lang.ExceptionInInitializerError E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory$1.run(KeyManagerFactory.java:57) E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory$1.run(KeyManagerFactory.java:56) E/Zygote ( 1253): at java.security.AccessController.doPrivilegedImpl(AccessController.java:264) E/Zygote ( 1253): at java.security.AccessController.doPrivileged(AccessController.java:84) E/Zygote ( 1253): at javax.net.ssl.KeyManagerFactory.getDefaultAlgorithm(KeyManagerFactory.java:55) E/Zygote ( 1253): at org.apache.harmony.xnet.provider.jsse.SSLParameters.(SSLParameters.java:142) E/Zygote ( 1253): at org.apache.harmony.xnet.provider.jsse.SSLContextImpl.engineInit(SSLContextImpl.java:82) E/Zygote ( 1253): at android.net.http.HttpsConnection.initializeEngine(HttpsConnection.java:101) E/Zygote ( 1253): at android.net.http.HttpsConnection.(HttpsConnection.java:65) E/Zygote ( 1253): ... 6 more E/Zygote ( 1253): Caused by: java.lang.NoClassDefFoundError: java.util.logging.LogManager E/Zygote ( 1253): at java.util.logging.Logger.initHandler(Logger.java:419) E/Zygote ( 1253): at java.util.logging.Logger.log(Logger.java:1094) E/Zygote ( 1253): at java.util.logging.Logger.warning(Logger.java:906) E/Zygote ( 1253): at org.apache.harmony.luni.util.MsgHelp.loadBundle(MsgHelp.java:61) E/Zygote ( 1253): at org.apache.harmony.luni.util.Msg.getString(Msg.java:60) E/Zygote ( 1253): at java.io.BufferedInputStream.read(BufferedInputStream.java:316) E/Zygote ( 1253): at java.io.FilterInputStream.read(FilterInputStream.java:138) E/Zygote ( 1253): at java.io.BufferedInputStream.fillbuf(BufferedInputStream.java:157) E/Zygote ( 1253): at java.io.BufferedInputStream.read(BufferedInputStream.java:243) E/Zygote ( 1253): at java.util.Properties.load(Properties.java:302) E/Zygote ( 1253): at java.security.Security$1.run(Security.java:80) E/Zygote ( 1253): at java.security.Security$1.run(Security.java:67) E/Zygote ( 1253): at java.security.AccessController.doPrivilegedImpl(AccessController.java:264) E/Zygote ( 1253): at java.security.AccessController.doPrivileged(AccessController.java:84) E/Zygote ( 1253): at java.security.Security.(Security.java:66) E/Zygote ( 1253): ... 15 more W/dalvikvm( 1253): threadid=3: thread exiting with uncaught exception (group=0x2aac6170)

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• Problem getting Java Streams in HP Tandem (Non-Stop)

  - by AndreaG

  Hi. We are porting a simple Java application between Tandem NonStop systems, from G-Series to H-Series. Java version is 1.5.0_02. When performing basic I/O tasks like getting output stream from or opening a client socket, we receive exceptions like java.io.IOException: Value out of range or java.net.SocketException: Value out of range ("value out of range" is Tandem native jargon for, well, quite everything I suppose). Has anybody got similar issues? i.e. I/O corruption while for example messing with JNI? I suppose there is something wrong with the system, but where might it be? Thank you. EDIT: adding snippets as requested sample snippet (a) - using Runtime.exec () (adapted) Properties envVars = new Properties(); Process p = r.exec("/bin/env"); envVars.load(p.getInputStream()); Stack trace (a): java.io.IOException: Value out of range (errno:4034) at java.io.FileInputStream.readBytes(Native Method) at java.io.FileInputStream.read(FileInputStream.java:194) at java.lang.UNIXProcess$DeferredCloseInputStream.read(UNIXProcess.java:221) at java.io.BufferedInputStream.read1(BufferedInputStream.java:254) at java.io.BufferedInputStream.read(BufferedInputStream.java:313) at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:411) at sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:453) at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:183) at java.io.InputStreamReader.read(InputStreamReader.java:167) at java.io.BufferedReader.fill(BufferedReader.java:136) at java.io.BufferedReader.readLine(BufferedReader.java:299) at java.io.BufferedReader.readLine(BufferedReader.java:362) at util.Environment.getVariables(Environment.java:39) Last line fails, and output gets redirected to console (!). sample snippet (b) - using HttpURLConnection: public WorkerThread (HttpURLConnection conn, String requestData, Logger logger) { this.conn = conn; ... } public void run () { OutputStream out = conn.getOutputStream (); } Stack trace (b): java.net.SocketException: Value out of range (errno:4034) at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) at java.net.Socket.connect(Socket.java:507) at sun.net.NetworkClient.doConnect(NetworkClient.java:155) at sun.net.www.http.HttpClient.openServer(HttpClient.java:365) at sun.net.www.http.HttpClient.openServer(HttpClient.java:477) at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:280) at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:337) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:176) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:736) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:162) at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:828) at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:230) Case (a) can be avoided because it was a workaround for other issues with previous JRE version (!), but same behaviour with sockets is really nasty.

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• Getting Information About Class Programatically (methods in class/properties of class)

  This article will teach you how to get information about some class like how many methods are there in class, how many properties are there etc..

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• RPi and Java Embedded GPIO: Sensor Reading using Java Code

  - by hinkmond

  And, now to program the Java code for reading the fancy-schmancy static electricity sensor connected to your Raspberry Pi, here is the source code we'll use: First, we need to initialize ourselves... /* * Java Embedded Raspberry Pi GPIO Input app */ package jerpigpioinput; import java.io.FileWriter; import java.io.RandomAccessFile; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Calendar; /** * * @author hinkmond */ public class JerpiGPIOInput { static final String GPIO_IN = "in"; // Add which GPIO ports to read here static String[] GpioChannels = { "7" }; /** * @param args the command line arguments */ public static void main(String[] args) { try { /*** Init GPIO port(s) for input ***/ // Open file handles to GPIO port unexport and export controls FileWriter unexportFile = new FileWriter("/sys/class/gpio/unexport"); FileWriter exportFile = new FileWriter("/sys/class/gpio/export"); for (String gpioChannel : GpioChannels) { System.out.println(gpioChannel); // Reset the port unexportFile.write(gpioChannel); unexportFile.flush(); // Set the port for use exportFile.write(gpioChannel); exportFile.flush(); // Open file handle to input/output direction control of port FileWriter directionFile = new FileWriter("/sys/class/gpio/gpio" + gpioChannel + "/direction"); // Set port for input directionFile.write(GPIO_IN); directionFile.flush(); } And, next we will open up a RandomAccessFile pointer to the GPIO port. /*** Read data from each GPIO port ***/ RandomAccessFile[] raf = new RandomAccessFile[GpioChannels.length]; int sleepPeriod = 10; final int MAXBUF = 256; byte[] inBytes = new byte[MAXBUF]; String inLine; int zeroCounter = 0; // Get current timestamp with Calendar() Calendar cal; DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss.SSS"); String dateStr; // Open RandomAccessFile handle to each GPIO port for (int channum=0; channum Then, loop forever to read in the values to the console. // Loop forever while (true) { // Get current timestamp for latest event cal = Calendar.getInstance(); dateStr = dateFormat.format(cal.getTime()); // Use RandomAccessFile handle to read in GPIO port value for (int channum=0; channum Rinse, lather, and repeat... Compile this Java code on your host PC or Mac with javac from the JDK. Copy over the JAR or class file to your Raspberry Pi, "sudo -i" to become root, then start up this Java app in a shell on your RPi. That's it! You should see a "1" value get logged each time you bring a statically charged item (like a balloon you rub on the cat) near the antenna of the sensor. There you go. You've just seen how Java Embedded technology on the Raspberry Pi is an easy way to access sensors. Hinkmond

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• javax.naming.InvalidNameException using Oracle BPM and weblogic when accessing directory

  - by alfredozn

  We are getting this exception when we start our cluster (2 managed servers, 1 admin), we have deployed only the ears corresponding to the OBPM 10.3.1 SP1 in a weblogic 10.3. When the server cluster starts, one of the managed servers (the first to start) get overloaded and ran out of connections to the directory DB because of this repeatedly error. It looks like the engine is trying to get the info from the LDAP server but I don't know why it is building a wrong query. fuego.directory.DirectoryRuntimeException: Exception [javax.naming.InvalidNameException: CN=Alvarez Guerrero Bernardo DEL:ca9ef28d-3b94-4e8f-a6bd-8c880bb3791b,CN=Deleted Objects,DC=corp: [LDAP: error code 34 - 0000208F: NameErr: DSID-031001BA, problem 2006 (BAD_NAME), data 8349, best match of: 'CN=Alvarez Guerrero Bernardo DEL:ca9ef28d-3b94-4e8f-a6bd-8c880bb3791b,CN=Deleted Objects,DC=corp,dc=televisa,dc=com,dc=mx' ^@]; remaining name 'CN=Alvarez Guerrero Bernardo DEL:ca9ef28d-3b94-4e8f-a6bd-8c880bb3791b,CN=Deleted Objects,DC=corp']. at fuego.directory.DirectoryRuntimeException.wrapException(DirectoryRuntimeException.java:85) at fuego.directory.hybrid.ldap.JNDIQueryExecutor.selectById(JNDIQueryExecutor.java:163) at fuego.directory.hybrid.ldap.JNDIQueryExecutor.selectById(JNDIQueryExecutor.java:110) at fuego.directory.hybrid.ldap.Repository.selectById(Repository.java:38) at fuego.directory.hybrid.msad.MSADGroupValueProvider.getAssignedParticipantsInternal(MSADGroupValueProvider.java:124) at fuego.directory.hybrid.msad.MSADGroupValueProvider.getAssignedParticipants(MSADGroupValueProvider.java:70) at fuego.directory.hybrid.ldap.Group$7.getValue(Group.java:149) at fuego.directory.hybrid.ldap.Group$7.getValue(Group.java:152) at fuego.directory.hybrid.ldap.LDAPResult.getValue(LDAPResult.java:76) at fuego.directory.hybrid.ldap.LDAPOrganizationGroupAccessor.setInfo(LDAPOrganizationGroupAccessor.java:352) at fuego.directory.hybrid.ldap.LDAPOrganizationGroupAccessor.build(LDAPOrganizationGroupAccessor.java:121) at fuego.directory.hybrid.ldap.LDAPOrganizationGroupAccessor.build(LDAPOrganizationGroupAccessor.java:114) at fuego.directory.hybrid.ldap.LDAPOrganizationGroupAccessor.fetchGroup(LDAPOrganizationGroupAccessor.java:94) at fuego.directory.hybrid.HybridGroupAccessor.fetchGroup(HybridGroupAccessor.java:146) at sun.reflect.GeneratedMethodAccessor66.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at fuego.directory.provider.DirectorySessionImpl$AccessorProxy.invoke(DirectorySessionImpl.java:756) at $Proxy66.fetchGroup(Unknown Source) at fuego.directory.DirOrganizationalGroup.fetch(DirOrganizationalGroup.java:275) at fuego.metadata.GroupManager.loadGroup(GroupManager.java:225) at fuego.metadata.GroupManager.find(GroupManager.java:57) at fuego.metadata.ParticipantManager.addNestedGroups(ParticipantManager.java:621) at fuego.metadata.ParticipantManager.buildCompleteRoleAssignments(ParticipantManager.java:527) at fuego.metadata.Participant$RoleTransitiveClousure.build(Participant.java:760) at fuego.metadata.Participant$RoleTransitiveClousure.access$100(Participant.java:692) at fuego.metadata.Participant.buildRoles(Participant.java:401) at fuego.metadata.Participant.updateMembers(Participant.java:372) at fuego.metadata.Participant.<init>(Participant.java:64) at fuego.metadata.Participant.createUncacheParticipant(Participant.java:84) at fuego.server.persistence.jdbc.JdbcProcessInstancePersMgr.loadItems(JdbcProcessInstancePersMgr.java:1706) at fuego.server.persistence.Persistence.loadInstanceItems(Persistence.java:838) at fuego.server.AbstractInstanceService.readInstance(AbstractInstanceService.java:791) at fuego.ejbengine.EJBInstanceService.getLockedROImpl(EJBInstanceService.java:218) at fuego.server.AbstractInstanceService.getLockedROImpl(AbstractInstanceService.java:892) at fuego.server.AbstractInstanceService.getLockedImpl(AbstractInstanceService.java:743) at fuego.server.AbstractInstanceService.getLockedImpl(AbstractInstanceService.java:730) at fuego.server.AbstractInstanceService.getLocked(AbstractInstanceService.java:144) at fuego.server.AbstractInstanceService.getLocked(AbstractInstanceService.java:162) at fuego.server.AbstractInstanceService.unselectAllItems(AbstractInstanceService.java:454) at fuego.server.execution.ToDoItemUnselect.execute(ToDoItemUnselect.java:105) at fuego.server.execution.DefaultEngineExecution$AtomicExecutionTA.runTransaction(DefaultEngineExecution.java:304) at fuego.transaction.TransactionAction.startNestedTransaction(TransactionAction.java:527) at fuego.transaction.TransactionAction.startTransaction(TransactionAction.java:548) at fuego.transaction.TransactionAction.start(TransactionAction.java:212) at fuego.server.execution.DefaultEngineExecution.executeImmediate(DefaultEngineExecution.java:123) at fuego.server.execution.DefaultEngineExecution.executeAutomaticWork(DefaultEngineExecution.java:62) at fuego.server.execution.EngineExecution.executeAutomaticWork(EngineExecution.java:42) at fuego.server.execution.ToDoItem.executeAutomaticWork(ToDoItem.java:261) at fuego.ejbengine.ItemExecutionBean$1.execute(ItemExecutionBean.java:223) at fuego.server.execution.DefaultEngineExecution$AtomicExecutionTA.runTransaction(DefaultEngineExecution.java:304) at fuego.transaction.TransactionAction.startBaseTransaction(TransactionAction.java:470) at fuego.transaction.TransactionAction.startTransaction(TransactionAction.java:551) at fuego.transaction.TransactionAction.start(TransactionAction.java:212) at fuego.server.execution.DefaultEngineExecution.executeImmediate(DefaultEngineExecution.java:123) at fuego.server.execution.EngineExecution.executeImmediate(EngineExecution.java:66) at fuego.ejbengine.ItemExecutionBean.processMessage(ItemExecutionBean.java:209) at fuego.ejbengine.ItemExecutionBean.onMessage(ItemExecutionBean.java:120) at weblogic.ejb.container.internal.MDListener.execute(MDListener.java:466) at weblogic.ejb.container.internal.MDListener.transactionalOnMessage(MDListener.java:371) at weblogic.ejb.container.internal.MDListener.onMessage(MDListener.java:327) at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:4547) at weblogic.jms.client.JMSSession.execute(JMSSession.java:4233) at weblogic.jms.client.JMSSession.executeMessage(JMSSession.java:3709) at weblogic.jms.client.JMSSession.access$000(JMSSession.java:114) at weblogic.jms.client.JMSSession$UseForRunnable.run(JMSSession.java:5058) at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:516) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201) at weblogic.work.ExecuteThread.run(ExecuteThread.java:173) Caused by: javax.naming.InvalidNameException: CN=Alvarez Guerrero Bernardo DEL:ca9ef28d-3b94-4e8f-a6bd-8c880bb3791b,CN=Deleted Objects,DC=corp: [LDAP: error code 34 - 0000208F: NameErr: DSID-031001BA, problem 2006 (BAD_NAME), data 8349, best match of: 'CN=Alvarez Guerrero Bernardo DEL:ca9ef28d-3b94-4e8f-a6bd-8c880bb3791b,CN=Deleted Objects,DC=corp,dc=televisa,dc=com,dc=mx' ^@]; remaining name 'CN=Alvarez Guerrero Bernardo DEL:ca9ef28d-3b94-4e8f-a6bd-8c880bb3791b,CN=Deleted Objects,DC=corp' at com.sun.jndi.ldap.LdapCtx.processReturnCode(LdapCtx.java:2979) at com.sun.jndi.ldap.LdapCtx.processReturnCode(LdapCtx.java:2794) at com.sun.jndi.ldap.LdapCtx.searchAux(LdapCtx.java:1826) at com.sun.jndi.ldap.LdapCtx.c_search(LdapCtx.java:1749) at com.sun.jndi.toolkit.ctx.ComponentDirContext.p_search(ComponentDirContext.java:368) at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.search(PartialCompositeDirContext.java:338) at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.search(PartialCompositeDirContext.java:321) at javax.naming.directory.InitialDirContext.search(InitialDirContext.java:248) at fuego.jndi.FaultTolerantLdapContext.search(FaultTolerantLdapContext.java:612) at fuego.directory.hybrid.ldap.JNDIQueryExecutor.selectById(JNDIQueryExecutor.java:136) ... 67 more

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• Java Spotlight Episode 75: Greg Luck on JSR 107 Java Temporary Caching API

  - by Roger Brinkley

  Tweet Recorded live at Jfokus 2012, an interview with Greg Luck on JSR 107 Java Temporary Caching API. Joining us this week on the Java All Star Developer Panel is Alexis Moussine-Pouchkine, Java EE Developer Advocate. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link:  Java Spotlight Podcast in iTunes. Show Notes News JavaOne 2012 call for papers is open (closes April 9th) LightFish, Adam Bien's lightweight telemetry application Java EE 6 sample code JavaFX 1.2 and 1.3 EOL Repeating Annotations in the Works Events March 26-29, EclipseCon, Reston, USA March 27, Virtual Developer Days - Java (Asia Pacific (English)),9:30 am to 2:00pm IST / 12:00pm to 4.30pm SGT  / 3.00pm - 7.30pm AEDT April 4-5, JavaOne Japan, Tokyo, Japan April 12, GreenJUG, Greenville, SC April 17-18, JavaOne Russia, Moscow Russia April 18–20, Devoxx France, Paris, France April 26, Mix-IT, Lyon, France, May 3-4, JavaOne India, Hyderabad, India Feature Interview Greg Luck founded Ehcache in 2003. He regularly speaks at conferences, writes and codes. He has also founded and maintains the JPam and Spnego open source projects, which are security focused. Prior to joining Terracotta in 2009, Greg was Chief Architect at Wotif.com where he provided technical leadership as the company went from a single product startup to a billion dollar public company with multiple product lines. Before that Greg was a consultant for ThoughtWorks with engagements in the US and Australia in the travel, health care, geospatial, banking and insurance industries. Before doing programming, Greg managed IT. He was CIO at Virgin Blue, Tempo Services, Stamford Hotels and Resorts and Australian Resorts. He is a Chartered Accountant, and spent 7 years with KPMG in small business and insolvency. Mail Bag What’s Cool RT @harkje: To update an earlier tweet: #JavaFX feels like Swing with added convenience methods, better looking widgets, nice effects and...

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• correct Installation and configuration of openJDK and R

  - by Marco K

  I am relatively new to Ubuntu so I wont know a lot of commands that probably became standard to a lot of you guys. I am trying to set up R and with it the necessary java dependencies to install e.g. JGR, rjava, etc. I read through quite a few instructions to do that but somehow I must have done sth wrong. Here is the state of R and java: R --version R version 2.14.1 (2011-12-22) Copyright (C) 2011 The R Foundation for Statistical Computing ISBN 3-900051-07-0 Platform: x86_64-pc-linux-gnu (64-bit) java -version java version "1.6.0_23" OpenJDK Runtime Environment (IcedTea6 1.11pre) (6b23~pre11-0ubuntu1.11.10.1) OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode) R CMD javareconf Java interpreter : /usr/bin/java Java version : 1.6.0_23 Java home path : /usr/lib/jvm/java-6-openjdk/jre Java compiler : /usr/bin/javac Java headers gen.: /usr/bin/javah Java archive tool: /usr/bin/jar Java library path: /usr/lib/jvm/java-6-openjdk/jre/lib/amd64/server:/usr/lib/jvm/java-6-openjdk/jre/lib/amd64:/usr/lib/jvm/java-6-openjdk/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib/jni:/lib:/usr/lib JNI linker flags : -L/usr/lib/jvm/java-6-openjdk/jre/lib/amd64/server -L/usr/lib/jvm/java-6-openjdk/jre/lib/amd64 -L/usr/lib/jvm/java-6-openjdk/jre/../lib/amd64 -L/usr/java/packages/lib/amd64 -L/usr/lib/jni -L/lib -L/usr/lib -ljvm JNI cpp flags : But when I try to install 'JavaGD' in R, which is a dependency for JGR I get: ... checking Java support in R... present: interpreter : '/usr/bin/java' cpp flags : '' java libs : '-L/usr/lib/jvm/java-6-openjdk/jre/lib/amd64/server -L/usr/lib/jvm/java-6-openjdk/jre/lib/amd64 -L/usr/lib/jvm/java-6-openjdk/jre/../lib/amd64 -L/usr/java/packages/lib/amd64 -L/usr/lib/jni -L/lib -L/usr/lib -ljvm' configure: error: One or more Java configuration variables are not set. Make sure R is configured with full Java support (including JDK). Run R CMD javareconf as root to add Java support to R. ... Any help would be greatly appreciated. Thanks!

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• java.io.FileNotFoundException: /target/test.log

  - by sword101

  Greetings all I am using Apache Camel and Apache CXF in this example: http://camel.apache.org/better-jms-transport-for-cxf-webservice-using-apache-camel.data/cxfcamelexample.zip I followed the readme and when tried to run the client & server classes i got this exception: log4j:ERROR setFile(null,true) call failed. java.io.FileNotFoundException: /target/test.log (No such file or directory) at java.io.FileOutputStream.openAppend(Native Method) at java.io.FileOutputStream.<init>(FileOutputStream.java:177) at java.io.FileOutputStream.<init>(FileOutputStream.java:102) at org.apache.log4j.FileAppender.setFile(FileAppender.java:289) at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:163) at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:256) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:132) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:96) at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:654) at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:612) at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:509) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:415) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:441) at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:470) at org.apache.log4j.LogManager.<clinit>(LogManager.java:122) at org.apache.log4j.Logger.getLogger(Logger.java:104) at org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.java:283) at org.apache.commons.logging.impl.Log4JLogger.<init>(Log4JLogger.java:108) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.apache.commons.logging.impl.LogFactoryImpl.createLogFromClass(LogFactoryImpl.java:1040) at org.apache.commons.logging.impl.LogFactoryImpl.discoverLogImplementation(LogFactoryImpl.java:838) at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:601) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:333) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:307) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:645) at org.springframework.context.support.AbstractApplicationContext.<init>(AbstractApplicationContext.java:146) at org.springframework.context.support.AbstractRefreshableApplicationContext.<init>(AbstractRefreshableApplicationContext.java:84) at org.springframework.context.support.AbstractRefreshableConfigApplicationContext.<init>(AbstractRefreshableConfigApplicationContext.java:59) at org.springframework.context.support.AbstractXmlApplicationContext.<init>(AbstractXmlApplicationContext.java:58) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:136) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93) at com.example.customerservice.impl.CustomerServiceClient.main(CustomerServiceClient.java:34) so any ideas, how to solve this exception ?

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• java.lang.NoClassDefFoundError in command line

  - by Graham

  Hi, I'm developing an application in Eclipse and it runs fine from within Eclipse. The problem I'm having is that when I export it to a jar file and run it from the command line I get a NoClassDefFound error for javax.mail.internet. In both my project build path and class path I have included the activation.jar and mail.jar libraries required for me to use javax.mail.internet, and like I said it works fine from within Eclipse but not when I export it to a jar. If my build path has those files and so does my class path why would this not be working? Here is the error stack: Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: javax/mai l/internet/InternetAddress at airit.com.Auxiliary.validateEmail(Auxiliary.java:29) at airit.com.MainFrame.actionPerformed(MainFrame.java:79) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour ce) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Caused by: java.lang.ClassNotFoundException: javax.mail.internet.InternetAddress at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 27 more

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