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  • A strange error in java generic.

    - by ???
    This is ok: Class<? extends String> stringClass = "a".getClass(); But this gets error: <T> void f(T obj) { Class<? extends T> objClass = obj.getClass(); } I know I can cast it like: <T> void f(T obj) { @SuppressWarnings("unchecked") Class<? extends T> objClass = (Class<? extends T>) obj.getClass(); } But why the previous error? Will the next release of Java 7 will support such usage?

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  • C# Generics Multiple Inheritance Problem

    - by Ciemnl
    Can any one help me with this syntax issue with C#? I have no idea how to do it. class SomeClass<T> : SomeOtherClass<T> where T : ISomeInterface , IAnotherInterface { ... } I want SomeClass to inherit from SomeOtherClass and IAnotherInterface and for T to inherit ISomeInterface only It seems the problem is that the where keyword screws everything up so that the compiler thinks both ISomeInterface and IAnotherInterface should both be inherited by T. This problem is very annoying and I think the solution is some kind of parenthesis but I have tried and failed finding one that works. Also, switching around the order of the two items inherited from SomeClass does not work because the class inherited always has to come before any interfaces. I couldn't find any solutions on the MSDN C# generics pages and I can't beleive I'm the first person to have this problem. Thanks, any help is much appreciated!

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  • Operation Problems in Java Generic

    - by alantheweasel
    I got some problem when i was learning Java Generic : interface calculator<T, R> { public void execute(T t, R r); } class executeAdd<T, R> implements calculator<T, R> { private T first; private R second; public executeAdd(T first, R second) { super(); this.first = first; this.second = second; } @Override public void execute(T t, R r) { // TODO Auto-generated method stub Object o = t + r // ERROR ! What i could do it ? } }

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  • GlassFish build failed

    - by hp1
    Hello, Each time I try to deploy my server side code, the build fails. If I try to restart my machine, the build is successful but fails later when I try to build the subsequent times. I get the following Severe messages when I attempt to build: SEVERE: "IOP00410216: (COMM_FAILURE) Unable to create IIOP listener on the specified host/port: localhost/3820" org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 216 completed: No WARNING: Can not find resource bundle for this logger. class name that failed: org.glassfish.enterprise.iiop.impl.IIOPSSLSocketFactory WARNING: Exception getting SocketInfo java.lang.RuntimeException: Orb initialization eror WARNING: "IOP02310202: (OBJ_ADAPTER) Error in connecting servant to ORB" org.omg.CORBA.OBJ_ADAPTER: vmcid: SUN minor code: 202 completed: No Following are the details for the severe method: SEVERE: "IOP00410216: (COMM_FAILURE) Unable to create IIOP listener on the specified host/port: localhost/3820" org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 216 completed: No at com.sun.corba.ee.impl.logging.ORBUtilSystemException.createListenerFailed(ORBUtilSystemException.java:3835) at com.sun.corba.ee.impl.logging.ORBUtilSystemException.createListenerFailed(ORBUtilSystemException.java:3855) at com.sun.corba.ee.impl.transport.SocketOrChannelAcceptorImpl.initialize(SocketOrChannelAcceptorImpl.java:98) at com.sun.corba.ee.impl.transport.CorbaTransportManagerImpl.getAcceptors(CorbaTransportManagerImpl.java:247) at com.sun.corba.ee.impl.transport.CorbaTransportManagerImpl.addToIORTemplate(CorbaTransportManagerImpl.java:264) at com.sun.corba.ee.spi.oa.ObjectAdapterBase.initializeTemplate(ObjectAdapterBase.java:131) at com.sun.corba.ee.impl.oa.toa.TOAImpl.<init>(TOAImpl.java:130) at com.sun.corba.ee.impl.oa.toa.TOAFactory.getTOA(TOAFactory.java:114) at com.sun.corba.ee.impl.orb.ORBImpl.connect(ORBImpl.java:1740) at com.sun.corba.ee.spi.presentation.rmi.StubAdapter.connect(StubAdapter.java:212) at com.sun.corba.ee.impl.orb.ORBImpl.getIOR(ORBImpl.java:2194) at com.sun.corba.ee.impl.orb.ORBImpl.getFVDCodeBaseIOR(ORBImpl.java:966) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.glassfish.gmbal.generic.FacetAccessorImpl.invoke(FacetAccessorImpl.java:126) at org.glassfish.gmbal.impl.MBeanImpl.invoke(MBeanImpl.java:440) at org.glassfish.gmbal.impl.AttributeDescriptor.get(AttributeDescriptor.java:144) at org.glassfish.gmbal.impl.MBeanSkeleton.getAttribute(MBeanSkeleton.java:569) at org.glassfish.gmbal.impl.MBeanSkeleton.getAttributes(MBeanSkeleton.java:625) at org.glassfish.gmbal.impl.MBeanImpl.getAttributes(MBeanImpl.java:389) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttributes(DefaultMBeanServerInterceptor.java:726) at com.sun.jmx.mbeanserver.JmxMBeanServer.getAttributes(JmxMBeanServer.java:665) at org.glassfish.admin.amx.util.jmx.MBeanProxyHandler.getAttributes(MBeanProxyHandler.java:273) at org.glassfish.admin.amx.core.proxy.AMXProxyHandler.attributesMap(AMXProxyHandler.java:1193) at org.glassfish.admin.amx.core.proxy.AMXProxyHandler.attributesMap(AMXProxyHandler.java:1203) at org.glassfish.admin.amx.core.proxy.AMXProxyHandler.handleSpecialMethod(AMXProxyHandler.java:414) at org.glassfish.admin.amx.core.proxy.AMXProxyHandler._invoke(AMXProxyHandler.java:792) at org.glassfish.admin.amx.core.proxy.AMXProxyHandler.invoke(AMXProxyHandler.java:526) at $Proxy107.attributesMap(Unknown Source) at org.glassfish.admin.amx.core.AMXValidator._validate(AMXValidator.java:642) at org.glassfish.admin.amx.core.AMXValidator.validate(AMXValidator.java:1298) at org.glassfish.admin.amx.impl.mbean.ComplianceMonitor$ValidatorThread.doRun(ComplianceMonitor.java:256) at org.glassfish.admin.amx.impl.mbean.ComplianceMonitor$ValidatorThread.run(ComplianceMonitor.java:227) Caused by: java.net.BindException: Address already in use at sun.nio.ch.Net.bind(Native Method) at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119) at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59) at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:52) at org.glassfish.enterprise.iiop.impl.IIOPSSLSocketFactory.createServerSocket(IIOPSSLSocketFactory.java:293) at com.sun.corba.ee.impl.transport.SocketOrChannelAcceptorImpl.initialize(SocketOrChannelAcceptorImpl.java:91) ... 32 more

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  • ??????????? - Java SE Embedded 8

    - by kshimizu-Oracle
    Java?OS??????1?????????????????????????????????3?????????????? HEAP: Java????????????????????????????????? NON-HEAP: NON-HEAP????JVM???????????????????Code Cache?Metaspace???2????????????? Code Cache: ????JIT??????????????????????????? Metaspace: HEAP??????????????????????????   JavaVM??????????: VM?????????????????? ??????????????? ????????????????????????????????????????????????????????????????????????? HEAP?Java Mission Control???????????????????? (????)? ????Java SE?????????????API????????????????????????????????????? Mission Control?????API?????????????????????????????????API??????????????? HEAP???????????? VM????????"-Xmx"???????????????? java.lang.Runtime.maxMemory(); ?????HEAP????????? ?????VM????????"-Xms"? ????????????? "-Xms"???????"-Xmx"?????????? java.lang.Runtime.totalMemory(); ???????????HEAP????????????? java.lang.Runtime.freeMemory(); ??NON-HEAP???????????? API??????????? Java Mission Control?????????? ????????????Java Mission Control??????????????????????? ????"NON_HEAP"?????????NON-HEAP?????? ???? HEAP????NON-HEAP?????????????? Java VM???????????????????????????????????????? ?????????????????????????????????? ????HEAP/NON-HEAP?????????????????????????? OS?????????????? Linux???????procfs?Java??????????????????? (VmHWM or VmRSS) ????? ????HEAP/NON-HEAP??????????????????????????? ?????????????????? ??????JVM?????????????????? ?????????????????JVM???????????????????? ???JVM?????? ????????????? Embedded??JVM?????????? ??Embedded???Oracle JVM??????CPU????????????????????????????????????????? ??????CPU??????????????????????????????????????? Minimal/Client/Server??JVM???????????????? ????JVM??????????????????? ??????Compact????????????????? ? 2 - 3?????? Concept Guide (http://docs.oracle.com/javase/8/embedded/embedded-concepts/basic-concepts.htm) ???????? ??JVM??????????? ????????????????????? -Xms: ??????????? ?????????? ?????????????????????????????????????????????????? -Xmx: ??????????? -XX:ReservedCodeCacheSize: Code Cache??????? ?) JIT??????????????Code Cache????????????0???????? -Xint: JIT??????????? ????????????? JIT?????????????????????? ????????????????? -Xss: ???????????????????? ????????????????????????? ????????????????????????????? -XX:CompileThreshold: JIT?????????????????????????????????? ?????????????????????? ????????? ?????????????????? Code Cache?????????? ?????????? ????????????????????? ????????????????????????? ??????????????????????? ?????????????????????

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  • javax.servlet.ServletException: Servlet.init() for servlet Relay threw exception

    - by Talha Bin Shakir
    I built application by using Netbeans and its working fine. But When i deployed on TOMCAT I am getting this error javax.servlet.ServletException: Servlet.init() for servlet Relay threw exception org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454) java.lang.Thread.run(Thread.java:636) *root cause* java.security.AccessControlException: access denied (java.util.PropertyPermission jasper.reports.compile.class.path write) java.security.AccessControlContext.checkPermission(AccessControlContext.java:342) java.security.AccessController.checkPermission(AccessController.java:553) java.lang.SecurityManager.checkPermission(SecurityManager.java:549) java.lang.System.setProperty(System.java:744) com.servlet.Relay.init(Relay.java:38) javax.servlet.GenericServlet.init(GenericServlet.java:212) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:616) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:269) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject.java:537) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:301) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:115) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454) Any Idea.

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  • Java error: Bad version number in .class file error when trying to run Cassandra on OS X

    - by Sam Lee
    I am trying to get Cassandra to work on OS X. When I run bin/cassandra, I get the following error: ~/apache-cassandra-incubating-0.4.1-src > bin/cassandra -f Listening for transport dt_socket at address: 8888 Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:675) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:316) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374) From what I could determine by searching, this error is related to incompatible versions of Java. However, as far as I can tell, I have the latest version of Java: ~/apache-cassandra-incubating-0.4.1-src > java -version java version "1.6.0_13" Java(TM) SE Runtime Environment (build 1.6.0_13-b03-211) Java HotSpot(TM) 64-Bit Server VM (build 11.3-b02-83, mixed mode) ~/apache-cassandra-incubating-0.4.1-src > javac -version javac 1.6.0_13 ~/Downloads/apache-cassandra-incubating-0.4.1-src > echo $JAVA_HOME /System/Library/Frameworks/JavaVM.framework/Versions/1.6/Home Any ideas on what I'm doing wrong?

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  • java.sql.Exception ClosedConnection

    - by john
    I am getting the following error: java.sql.SQLException: Closed Connection at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:208) at oracle.jdbc.driver.PhysicalConnection.getMetaData(PhysicalConnection.java:1508) at com.ibatis.sqlmap.engine.execution.SqlExecutor.moveToNextResultsSafely(SqlExecutor.java:348) at com.ibatis.sqlmap.engine.execution.SqlExecutor.handleMultipleResults(SqlExecutor.java:320) at com.ibatis.sqlmap.engine.execution.SqlExecutor.executeQueryProcedure(SqlExecutor.java:277) at com.ibatis.sqlmap.engine.mapping.statement.ProcedureStatement.sqlExecuteQuery(ProcedureStatement.java:34) at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:173) at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryForList(GeneralStatement.java:123) at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:614) at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:588) at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForList(SqlMapSessionImpl.java:118) at org.springframework.orm.ibatis.SqlMapClientTemplate$3.doInSqlMapClient(SqlMapClientTemplate.java:268) at org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:193) at org.springframework.orm.ibatis.SqlMapClientTemplate.executeWithListResult(SqlMapClientTemplate.java:219) at org.springframework.orm.ibatis.SqlMapClientTemplate.queryForList(SqlMapClientTemplate.java:266) at gov.hud.pih.eiv.web.authentication.AuthenticationUserDAO.isPihUserDAO(AuthenticationUserDAO.java:24) at gov.hud.pih.eiv.web.authorization.AuthorizationProxy.isAuthorized(AuthorizationProxy.java:125) at gov.hud.pih.eiv.web.authorization.AuthorizationFilter.doFilter(AuthorizationFilter.java:224) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) at I am really stumped and can't figure out what could be causing this error. I am not able to reproduce the error on my machine but on production it is coming a lot of times. I am using iBatis in the whole application so there are no chances of my code not closing connections. We do have stored procedures that run for a long time before they return results (around 15 seconds). does anyone have any ideas on what could be causing this? I dont think raising the # of connections on the application server will fix this issue buecause if connections were running out then we'd see "Error on allocating connections"

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  • Problem running java code through command line

    - by kunjaan
    I have a simple Class package chapter10; public class CompilationTest { public static void main(String[] args) { System.out.println("HELLO WORLD"); } } The path is Test\src\chapter10\CompilationTest.java I successfully compiled the code into the same folder and now I have Test\src\chapter10\CompilationTest.class However when I try to run from the same folder it I get this error >java CompilationTest Exception in thread "main" java.lang.NoClassDefFoundError: CompilationTest (wrong name: chapter10/CompilationTest) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(Unknown Source) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$000(Unknown Source) 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) Could not find the main class: CompilationTest. Program will exit. When I run using >java chapter10/PropertiesTest Exception in thread "main" java.lang.NoClassDefFoundError: chapter10/PropertiesTest Caused by: java.lang.ClassNotFoundException: chapter10.PropertiesTest 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) Could not find the main class: chapter10/PropertiesTest. Program will exit.

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  • Wrapping up an Exciting Mobile World Congress

    - by Jacob Lehrbaum
    Its been a busy week here in Barcelona, with noticeably more energy at the show than in 2010. This year, we decided to move the Java booth to the App Planet and really engage with the increasing number of developers that are attending the event. Our booth featured 10 demos and a series of nearly 25 workshops featuring a variety of topics ranging from information about Java Verified, to the use of web technologies with Java ME, to sessions hosted by Operators such as Orange and Telefonica (see image to the left).One of the more popular topics in our booth was the use of Java in the Smart Grid. In our booth we were showing off some of the work of the Hydra Consortium whose goal it is to leverage the emerging smart grid infrastructure to securely enable the delivery of personal health data (weight, blood pressure, etc) from the home to your doctor. If you'd like to learn more about this innovative project, you can watch a video that was filmed at the event featuring Charles Palmer of Onzo. If you'd like to learn more about Java in the Smart Grid, check out our on-demand webinar

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  • Java map with values limited by key's type parameter

    - by Ashley Mercer
    Is there a way in Java to have a map where the type parameter of a value is tied to the type parameter of a key? What I want to write is something like the following: public class Foo { // This declaration won't compile - what should it be? private static Map<Class<T>, T> defaultValues; // These two methods are just fine public static <T> void setDefaultValue(Class<T> clazz, T value) { defaultValues.put(clazz, value); } public static <T> T getDefaultValue(Class<T> clazz) { return defaultValues.get(clazz); } } That is, I can store any default value against a Class object, provided the value's type matches that of the Class object. I don't see why this shouldn't be allowed since I can ensure when setting/getting values that the types are correct. EDIT: Thanks to cletus for his answer. I don't actually need the type parameters on the map itself since I can ensure consistency in the methods which get/set values, even if it means using some slightly ugly casts.

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  • How can Java be improved so that it no longer needs to perform type erasure? [closed]

    - by user63904
    The official Java tutorial on generics explains type erasure and why it was added to the compiler: When a generic type is instantiated, the compiler translates those types by a technique called type erasure — a process where the compiler removes all information related to type parameters and type arguments within a class or method. Type erasure enables Java applications that use generics to maintain binary compatibility with Java libraries and applications that were created before generics. This most likely was a pragmatic approach, or perhaps the least painful one. However, now that generics is widely supported across the industry, what can be done in order for us to not need type erasure? Is it feasible with out needing to break backwards compatibility, or if it is feasible, is it practical? Has the last the last statement in the quote above become self referential? That is: "type erasure enables Java applications that use generics to maintain binary compatibility with Java libraries and applications that were created with Java versions that perform type erasure."

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  • Wildcards vs. generic methods

    - by FredOverflow
    Is there any practical difference between the following approaches to print all elements in a range? public static void printA(Iterable<?> range) { for (Object o : range) { System.out.println(o); } } public static <T> void printB(Iterable<T> range) { for (T x : range) { System.out.println(x); } } Apparently, printB involves an additional checked cast to Object (see line 16), which seems rather stupid to me -- isn't everything an Object anyway? public static void printA(java.lang.Iterable); Code: 0: aload_0 1: invokeinterface #18, 1; //InterfaceMethod java/lang/Iterable.iterator:()Ljava/util/Iterator; 6: astore_2 7: goto 24 10: aload_2 11: invokeinterface #24, 1; //InterfaceMethod java/util/Iterator.next:()Ljava/lang/Object; 16: astore_1 17: getstatic #30; //Field java/lang/System.out:Ljava/io/PrintStream; 20: aload_1 21: invokevirtual #36; //Method java/io/PrintStream.println:(Ljava/lang/Object;)V 24: aload_2 25: invokeinterface #42, 1; //InterfaceMethod java/util/Iterator.hasNext:()Z 30: ifne 10 33: return public static void printB(java.lang.Iterable); Code: 0: aload_0 1: invokeinterface #18, 1; //InterfaceMethod java/lang/Iterable.iterator:()Ljava/util/Iterator; 6: astore_2 7: goto 27 10: aload_2 11: invokeinterface #24, 1; //InterfaceMethod java/util/Iterator.next:()Ljava/lang/Object; 16: checkcast #3; //class java/lang/Object 19: astore_1 20: getstatic #30; //Field java/lang/System.out:Ljava/io/PrintStream; 23: aload_1 24: invokevirtual #36; //Method java/io/PrintStream.println:(Ljava/lang/Object;)V 27: aload_2 28: invokeinterface #42, 1; //InterfaceMethod java/util/Iterator.hasNext:()Z 33: ifne 10 36: return

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  • Working with libpath with java reflection.

    - by C. Ross
    I'm dynamically loading a class and calling a method on it. This class does JNI. When I call the class, java attempts to load the library. This causes an error because the library is not on the libpath. I'm calling from instead a jar so I can't easily change the libpath (especially since the library is not in the same directory or a sub directory of the jar). I do know the path of the library, but how can I load it before I load the class. Current code: public Class<?> loadClass(String name) throws ClassNotFoundException { if(!CLASS_NAME.equals(name)) return super.loadClass(name); try { URL myUrl = new URL(classFileUrl); URLConnection connection = myUrl.openConnection(); InputStream input = connection.getInputStream(); byte[] classData = readConnectionToArray(input); return defineClass(CLASS_NAME, classData, 0, classData.length); } catch (MalformedURLException e) { throw new UndeclaredThrowableException(e); } catch (IOException e) { throw new UndeclaredThrowableException(e); } } Exception: Can't find library libvcommon.so java.lang.UnsatisfiedLinkError: vcommon (A file or directory in the path name does not exist.) at java.lang.ClassLoader.loadLibraryWithPath(ClassLoader.java:998) at java.lang.ClassLoader.loadLibraryWithClassLoader(ClassLoader.java:962) at java.lang.System.loadLibrary(System.java:465) at vcommon.(vcommon.java:103) at java.lang.J9VMInternals.initializeImpl(Native Method) at java.lang.J9VMInternals.initialize(J9VMInternals.java:200) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:599) at com.fortune500.fin.v.vunit.reflection.ReflectionvProcessor.calculateV(ReflectionvProcessor.java:36) at com.fortune500.fin.v.vunit.UTLTestCase.execute(UTLTestCase.java:42) at com.fortune500.fin.v.vunit.TestSuite.execute(TestSuite.java:15) at com.fortune500.fin.v.vunit.batch.Testvendor.execute(Testvendor.java:101) at com.fortune500.fin.v.vunit.batch.Testvendor.main(Testvendor.java:58) Related: Dynamic loading a class in java with a different package name

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  • Trouble swapping values as keys in generic java BST class

    - by user1729869
    I was given a generic binary search tree class with the following declaration: public class BST<K extends Comparable<K>, V> I was asked to write a method that reverses the BST such that the values become the keys and keys become values. When I call the following method (defined in the class given) reverseDict.put(originalDict.get(key), key); I get the following two error messages from Netbeans: Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - Erroneous sym type: BST.put And also: no suitable method found for put(V,K) method BST.put(BST<K,V>.Node,K,V) is not applicable (actual and formal argument lists differ in length) method BST.put(K,V) is not applicable (actual argument V cannot be converted to K by method invocation conversion) where V,K are type-variables: V extends Object declared in method <K,V>reverseBST(BST<K,V>) K extends Comparable<K> declared in method <K,V>reverseBST(BST<K,V>) From what the error messages are telling me, since my values do not extend Comparable I am unable to use them as keys. If I am right, how can I get around that without changing the class given (maybe a cast)?

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  • Updating and deleting java (red hat / centos) (new)

    - by JochemTheSchoolKid
    I am a total noob with linux. So please explain clearly if you have a solution for me. I have an VPS and I want to update JAVA. I found a guide on the Java site which says: rpm -e < package_name I searched for the packages: [root@srv1 ~]# rpm -qa | grep java java_cup-0.10k-5.el6.x86_64 java-1.5.0-gcj-1.5.0.0-29.1.el6.x86_64 Than I tried to do the delete command [root@srv1 ~]# rpm -e java-1.5.0-gcj-1.5.0.0-29.1.el6.x86_64 error: Failed dependencies: java-gcj-compat is needed by (installed) java_cup-1:0.10k-5.el6.x86_64 java-gcj-compat >= 1.0.70 is needed by (installed) sinjdoc-0.5-9.1.el6.x86_64 What should I do now? Removing has worked thanks to the answer below Problem two! Now am I installing this package from java [root@srv1 java]# rpm -ivh jre-7u9-linux-i586.rpm Preparing... ########################################### [100%] 1:jre ########################################### [100%] Unpacking JAR files... rt.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/rt.pack jsse.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/jsse.pack charsets.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/charsets.pack localedata.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/ext/localedata.pack plugin.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/plugin.pack javaws.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/javaws.pack deploy.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/deploy.pack Can someone help me again with this?

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  • How to repair Java in Ubuntu after trying to switch to Java 6 using update-java-alternatives

    - by Kau-Boy
    I tried to switch from Java 5 to Java 6 using the "update-java-alternatives" command like explained on this page: https://help.ubuntu.com/community/Java But afterwards I get the following error when I tried to execute java: root@webserver:~# java Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. I also tried to reinstall the java binaries using "apt-get" but I didn't succeed reinstalling it. I would like to post the "apt-get" errors, but unfortunately I don't know how to print out the error messages in English and not in German. My system is a Ubuntu 8.04 ROOT server.

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  • Java Builder pattern with Generic type bounds

    - by I82Much
    Hi all, I'm attempting to create a class with many parameters, using a Builder pattern rather than telescoping constructors. I'm doing this in the way described by Joshua Bloch's Effective Java, having private constructor on the enclosing class, and a public static Builder class. The Builder class ensures the object is in a consistent state before calling build(), at which point it delegates the construction of the enclosing object to the private constructor. Thus public class Foo { // Many variables private Foo(Builder b) { // Use all of b's variables to initialize self } public static final class Builder { public Builder(/* required variables */) { } public Builder var1(Var var) { // set it return this; } public Foo build() { return new Foo(this); } } } I then want to add type bounds to some of the variables, and thus need to parametrize the class definition. I want the bounds of the Foo class to be the same as that of the Builder class. public class Foo<Q extends Quantity> { private final Unit<Q> units; // Many variables private Foo(Builder<Q> b) { // Use all of b's variables to initialize self } public static final class Builder<Q extends Quantity> { private Unit<Q> units; public Builder(/* required variables */) { } public Builder units(Unit<Q> units) { this.units = units; return this; } public Foo build() { return new Foo<Q>(this); } } } This compiles fine, but the compiler is allowing me to do things I feel should be compiler errors. E.g. public static final Foo.Builder<Acceleration> x_Body_AccelField = new Foo.Builder<Acceleration>() .units(SI.METER) .build(); Here the units argument is not Unit<Acceleration> but Unit<Length>, but it is still accepted by the compiler. What am I doing wrong here? I want to ensure at compile time that the unit types match up correctly.

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  • Difference between jruby AOT classes with --java flag and without

    - by Johnathan Leppert
    When I compile a ruby file to a java class using jrubyc, I get different output when compiling with just jrubyc and with jrubyc --java (to generate the java file) and just javac. Why? Example: First Method: $ jrubyc --java myscript.rb $ javac -cp .:./jruby-complete.jar myscript.java Second Method: $ jrubyc myscript.rb I'd expect the generated classes to be exactly the same, but they're not. What's jrubyc doing under the covers? Thanks!

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  • Instantiating a list of parameterized types, making beter use of Generics and Linq

    - by DanO
    I'm hashing a file with one or more hash algorithms. When I tried to parametrize which hash types I want, it got a lot messier than I was hoping. I think I'm missing a chance to make better use of generics or LINQ. I also don't like that I have to use a Type[] as the parameter instead of limiting it to a more specific set of type (HashAlgorithm descendants), I'd like to specify types as the parameter and let this method do the constructing, but maybe this would look better if I had the caller new-up instances of HashAlgorithm to pass in? public List<string> ComputeMultipleHashesOnFile(string filename, Type[] hashClassTypes) { var hashClassInstances = new List<HashAlgorithm>(); var cryptoStreams = new List<CryptoStream>(); FileStream fs = File.OpenRead(filename); Stream cryptoStream = fs; foreach (var hashClassType in hashClassTypes) { object obj = Activator.CreateInstance(hashClassType); var cs = new CryptoStream(cryptoStream, (HashAlgorithm)obj, CryptoStreamMode.Read); hashClassInstances.Add((HashAlgorithm)obj); cryptoStreams.Add(cs); cryptoStream = cs; } CryptoStream cs1 = cryptoStreams.Last(); byte[] scratch = new byte[1 << 16]; int bytesRead; do { bytesRead = cs1.Read(scratch, 0, scratch.Length); } while (bytesRead > 0); foreach (var stream in cryptoStreams) { stream.Close(); } foreach (var hashClassInstance in hashClassInstances) { Console.WriteLine("{0} hash = {1}", hashClassInstance.ToString(), HexStr(hashClassInstance.Hash).ToLower()); } }

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  • Generics and collections ... struggling with an implementation

    - by mattruma
    I am trying to figure out a way to leverage generics so I can make the property Value be an actual type that initialized (not sure if this is the correct way of saying it) when my collection class is created. I would like to have the syntax be something like: var list = new ListItemCollection<Guid>(parameters would go here); I have the following class: [Serializable] public class ListItem { public object Value { get; set; } public string Text { get; set; } public object DataContext { get; set; } public Nullable<bool> Checked { get; set; } public ListItem() { this.Checked = false; } } I have the following collection: [Serializable] public class ListItemCollection : List<ListItem> { public ListItem this[object value] { get { foreach (var child in this) { if (child.Value.Equals(value)) return child; } return null; } } public bool Contains(object value) { foreach (var child in this) { if (child.Value.Equals(value)) return true; } return false; } public void Add(object value, string text) { this.Add(value, text, null); } public void Add(object value, string text, object dataContext) { var child = new ListItem(); child.Value = value; child.Text = text; child.DataContext = dataContext; this.Add(child); } public ListItemCollection() { } public ListItemCollection(IEnumerable items, string displayMember, string valueMember, bool showEmptyItem, string emptyItemText, object emptyItemValue) { if (showEmptyItem) { this.Add(emptyItemValue, emptyItemText); } foreach (object item in items) { object text = null; object value = null; text = item.GetType().GetProperty(displayMember).GetValue(item, null); value = item.GetType().GetProperty(valueMember).GetValue(item, null); // Add the item this.Add(value, text.ToString(), item); } } }

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  • Structure map and generics (in XML config)

    - by James D
    Hi I'm using the latest StructureMap (2.5.4.264), and I need to define some instances in the xml configuration for StructureMap using generics. However I get the following 103 error: Unhandled Exception: StructureMap.Exceptions.StructureMapConfigurationException: StructureMap configuration failures: Error: 103 Source: Requested PluginType MyTest.ITest`1[[MyTest.Test,MyTest]] configured in Xml cannot be found Could not create a Type for 'MyTest.ITest`1[[MyTest.Test,MyTest]]' System.ApplicationException: Could not create a Type for 'MyTest.ITest`1[[MyTest.Test,MyTest]]' ---> System.TypeLoadException: Could not loa d type 'MyTest.ITest`1' from assembly 'StructureMap, Version=2.5.4.264, Culture=neutral, PublicKeyToken=e60ad81abae3c223'. at System.RuntimeTypeHandle._GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName) at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark) at System.RuntimeType.PrivateGetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& s tackMark) at System.Type.GetType(String typeName, Boolean throwOnError) at StructureMap.Graph.TypePath.FindType() --- End of inner exception stack trace --- at StructureMap.Graph.TypePath.FindType() at StructureMap.Configuration.GraphBuilder.ConfigureFamily(TypePath pluginTypePath, Action`1 action) A simply replication of the code is as follows: public interface ITest<T> { } public class Test { } public class Concrete : ITest<Test> { } Which I then wish to define in the XML configuration something as follows: <DefaultInstance PluginType="MyTest.ITest`1[[MyTest.Test,MyTest]],MyTest" PluggedType="MyTest.Concrete,MyTest" Scope="Singleton" /> I've been racking my brain, however I can't see what I'm doing wrong - I've used Type.GetType to verify the type actually is valid which it is. Anyone have any ideas? Thanks !

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  • ca-certificates-java fails when trying to install openjdk-6-jre

    - by Jonas
    I use a VPS with Ubuntu Server 10.10 x64. I want to use Java and run the command sudo apt-get install openjdk-6-jre but it fails because the installation encounted errors while processing ca-certificates-java. I have tried to install the failed package with: sudo apt-get install ca-certificates-java How can I solve this? I have run sudo apt-get update and sudo apt-get upgrade but I get the same errors after that. I have also installed Ubuntu Server x64 on a VirtualBox, but the two Ubuntu Server 10.10 has different kernel versions (2.6.35 on VirtualBox and 2.6.18 on my VPS). And on VirtualBox I can install Jetty without any problems. The VPS is a fresh install of Ubuntu Server 10.10 x64, the first command I was running was sudo apt-get install openjdk-6-jre. When I run sudo apt-get install ca-certificates-java I get this message: Reading package lists... Done Building dependency tree Reading state information... Done ca-certificates-java is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 0B of additional disk space will be used. Do you want to continue [Y/n]? Here I press Y then I get this message: Setting up ca-certificates-java (20100412) ... creating /etc/ssl/certs/java/cacerts... error adding brasil.gov.br/brasil.gov.br.crt error adding cacert.org/cacert.org.crt error adding debconf.org/ca.crt error adding gouv.fr/cert_igca_dsa.crt error adding gouv.fr/cert_igca_rsa.crt error adding mozilla/ABAecom_=sub.__Am._Bankers_Assn.=_Root_CA.crt error adding mozilla/AOL_Time_Warner_Root_Certification_Authority_1.crt error adding mozilla/AOL_Time_Warner_Root_Certification_Authority_2.crt error adding mozilla/AddTrust_External_Root.crt error adding mozilla/AddTrust_Low-Value_Services_Root.crt error adding mozilla/AddTrust_Public_Services_Root.crt error adding mozilla/AddTrust_Qualified_Certificates_Root.crt error adding mozilla/America_Online_Root_Certification_Authority_1.crt error adding mozilla/America_Online_Root_Certification_Authority_2.crt error adding mozilla/Baltimore_CyberTrust_Root.crt error adding mozilla/COMODO_Certification_Authority.crt error adding mozilla/COMODO_ECC_Certification_Authority.crt error adding mozilla/Camerfirma_Chambers_of_Commerce_Root.crt error adding mozilla/Camerfirma_Global_Chambersign_Root.crt error adding mozilla/Certplus_Class_2_Primary_CA.crt error adding mozilla/Certum_Root_CA.crt error adding mozilla/Comodo_AAA_Services_root.crt error adding mozilla/Comodo_Secure_Services_root.crt error adding mozilla/Comodo_Trusted_Services_root.crt error adding mozilla/DST_ACES_CA_X6.crt error adding mozilla/DST_Root_CA_X3.crt error adding mozilla/DigiCert_Assured_ID_Root_CA.crt error adding mozilla/DigiCert_Global_Root_CA.crt error adding mozilla/DigiCert_High_Assurance_EV_Root_CA.crt error adding mozilla/DigiNotar_Root_CA.crt error adding mozilla/Digital_Signature_Trust_Co._Global_CA_1.crt error adding mozilla/Digital_Signature_Trust_Co._Global_CA_2.crt error adding mozilla/Digital_Signature_Trust_Co._Global_CA_3.crt error adding mozilla/Digital_Signature_Trust_Co._Global_CA_4.crt error adding mozilla/Entrust.net_Global_Secure_Personal_CA.crt error adding mozilla/Entrust.net_Global_Secure_Server_CA.crt error adding mozilla/Entrust.net_Premium_2048_Secure_Server_CA.crt error adding mozilla/Entrust.net_Secure_Personal_CA.crt error adding mozilla/Entrust.net_Secure_Server_CA.crt error adding mozilla/Entrust_Root_Certification_Authority.crt error adding mozilla/Equifax_Secure_CA.crt error adding mozilla/Equifax_Secure_Global_eBusiness_CA.crt error adding mozilla/Equifax_Secure_eBusiness_CA_1.crt error adding mozilla/Equifax_Secure_eBusiness_CA_2.crt error adding mozilla/Firmaprofesional_Root_CA.crt error adding mozilla/GTE_CyberTrust_Global_Root.crt error adding mozilla/GTE_CyberTrust_Root_CA.crt error adding mozilla/GeoTrust_Global_CA.crt error adding mozilla/GeoTrust_Global_CA_2.crt error adding mozilla/GeoTrust_Primary_Certification_Authority.crt error adding mozilla/GeoTrust_Universal_CA.crt error adding mozilla/GeoTrust_Universal_CA_2.crt error adding mozilla/GlobalSign_Root_CA.crt error adding mozilla/GlobalSign_Root_CA_-_R2.crt error adding mozilla/Go_Daddy_Class_2_CA.crt error adding mozilla/IPS_CLASE1_root.crt error adding mozilla/IPS_CLASE3_root.crt error adding mozilla/IPS_CLASEA1_root.crt error adding mozilla/IPS_CLASEA3_root.crt error adding mozilla/IPS_Chained_CAs_root.crt error adding mozilla/IPS_Servidores_root.crt error adding mozilla/IPS_Timestamping_root.crt error adding mozilla/NetLock_Business_=Class_B=_Root.crt error adding mozilla/NetLock_Express_=Class_C=_Root.crt error adding mozilla/NetLock_Notary_=Class_A=_Root.crt error adding mozilla/NetLock_Qualified_=Class_QA=_Root.crt error adding mozilla/Network_Solutions_Certificate_Authority.crt error adding mozilla/QuoVadis_Root_CA.crt error adding mozilla/QuoVadis_Root_CA_2.crt error adding mozilla/QuoVadis_Root_CA_3.crt error adding mozilla/RSA_Root_Certificate_1.crt error adding mozilla/RSA_Security_1024_v3.crt error adding mozilla/RSA_Security_2048_v3.crt error adding mozilla/SecureTrust_CA.crt error adding mozilla/Secure_Global_CA.crt error adding mozilla/Security_Communication_Root_CA.crt error adding mozilla/Sonera_Class_1_Root_CA.crt error adding mozilla/Sonera_Class_2_Root_CA.crt error adding mozilla/Staat_der_Nederlanden_Root_CA.crt error adding mozilla/Starfield_Class_2_CA.crt error adding mozilla/StartCom_Certification_Authority.crt error adding mozilla/StartCom_Ltd..crt error adding mozilla/SwissSign_Gold_CA_-_G2.crt error adding mozilla/SwissSign_Platinum_CA_-_G2.crt error adding mozilla/SwissSign_Silver_CA_-_G2.crt error adding mozilla/Swisscom_Root_CA_1.crt error adding mozilla/TC_TrustCenter__Germany__Class_2_CA.crt error adding mozilla/TC_TrustCenter__Germany__Class_3_CA.crt error adding mozilla/TDC_Internet_Root_CA.crt error adding mozilla/TDC_OCES_Root_CA.crt error adding mozilla/TURKTRUST_Certificate_Services_Provider_Root_1.crt error adding mozilla/TURKTRUST_Certificate_Services_Provider_Root_2.crt error adding mozilla/Taiwan_GRCA.crt error adding mozilla/Thawte_Personal_Basic_CA.crt error adding mozilla/Thawte_Personal_Freemail_CA.crt error adding mozilla/Thawte_Personal_Premium_CA.crt error adding mozilla/Thawte_Premium_Server_CA.crt error adding mozilla/Thawte_Server_CA.crt error adding mozilla/Thawte_Time_Stamping_CA.crt error adding mozilla/UTN-USER_First-Network_Applications.crt error adding mozilla/UTN_DATACorp_SGC_Root_CA.crt error adding mozilla/UTN_USERFirst_Email_Root_CA.crt error adding mozilla/UTN_USERFirst_Hardware_Root_CA.crt error adding mozilla/ValiCert_Class_1_VA.crt error adding mozilla/ValiCert_Class_2_VA.crt error adding mozilla/VeriSign_Class_3_Public_Primary_Certification_Authority_-_G5.crt error adding mozilla/Verisign_Class_1_Public_Primary_Certification_Authority.crt error adding mozilla/Verisign_Class_1_Public_Primary_Certification_Authority_-_G2.crt error adding mozilla/Verisign_Class_1_Public_Primary_Certification_Authority_-_G3.crt error adding mozilla/Verisign_Class_2_Public_Primary_Certification_Authority.crt error adding mozilla/Verisign_Class_2_Public_Primary_Certification_Authority_-_G2.crt error adding mozilla/Verisign_Class_2_Public_Primary_Certification_Authority_-_G3.crt error adding mozilla/Verisign_Class_3_Public_Primary_Certification_Authority.crt error adding mozilla/Verisign_Class_3_Public_Primary_Certification_Authority_-_G2.crt error adding mozilla/Verisign_Class_3_Public_Primary_Certification_Authority_-_G3.crt error adding mozilla/Verisign_Class_4_Public_Primary_Certification_Authority_-_G2.crt error adding mozilla/Verisign_Class_4_Public_Primary_Certification_Authority_-_G3.crt error adding mozilla/Verisign_RSA_Secure_Server_CA.crt error adding mozilla/Verisign_Time_Stamping_Authority_CA.crt error adding mozilla/Visa_International_Global_Root_2.crt error adding mozilla/Visa_eCommerce_Root.crt error adding mozilla/WellsSecure_Public_Root_Certificate_Authority.crt error adding mozilla/Wells_Fargo_Root_CA.crt error adding mozilla/XRamp_Global_CA_Root.crt error adding mozilla/beTRUSTed_Root_CA-Baltimore_Implementation.crt error adding mozilla/beTRUSTed_Root_CA.crt error adding mozilla/beTRUSTed_Root_CA_-_Entrust_Implementation.crt error adding mozilla/beTRUSTed_Root_CA_-_RSA_Implementation.crt error adding mozilla/thawte_Primary_Root_CA.crt error adding signet.pl/signet_ca1_pem.crt error adding signet.pl/signet_ca2_pem.crt error adding signet.pl/signet_ca3_pem.crt error adding signet.pl/signet_ocspklasa2_pem.crt error adding signet.pl/signet_ocspklasa3_pem.crt error adding signet.pl/signet_pca2_pem.crt error adding signet.pl/signet_pca3_pem.crt error adding signet.pl/signet_rootca_pem.crt error adding signet.pl/signet_tsa1_pem.crt error adding spi-inc.org/spi-ca-2003.crt error adding spi-inc.org/spi-cacert-2008.crt error adding telesec.de/deutsche-telekom-root-ca-2.crt failed (VM used: java-6-openjdk). dpkg: error processing ca-certificates-java (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: ca-certificates-java E: Sub-process /usr/bin/dpkg returned an error code (1) Update I also get a problem when running java -version: Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. My VPS had 128MB of Memory, I changed to 256MB but got the same problem. Then I changed to 512MB and got the same problem. I found a related post on a forum: Sub-process /usr/bin/dpkg returned an error code (1) And I tried: sudo apt-get clean sudo apt-get --reinstall install openjdk-6-jre sudo dpkg --configure -a But I got the same problem, even when I'm using 512MB of Memory. Any suggestions?

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  • Oracle’s Java Community Outreach Plan

    - by Yolande Poirier
    As the steward of Java, Oracle recognizes the importance and value of the Java community, and the relevant role it plays in keeping Java the largest, most vibrant developer community in the world.   In order to increase Oracle’s touch with Java developers worldwide, we are shifting our focus from a flagship JavaOne event followed by several regional JavaOne conferences, to a new outreach model which continues with the JavaOne flagship event, as well as a mix of online content, regional Java Tours, and regional 3rd party event participation.  1. JavaOne JavaOne continues to remain the premier hub for Java developers where you are given the opportunity to improve your Java technical skills, and interact with other members of the Java community. JavaOne is centered on open collaboration and sharing, and Oracle will continue to invest in JavaOne as a unique stand-alone event for the Java community. Oracle recognizes that many developers cannot attend JavaOne in person, therefore Oracle will share the wealth of the unique event material to those developers through a new and easy-to-access online Java program. While online JavaOne content cannot address the importance of actual face-to-face community/developer engagements and networking, online content does aide in extending the Java technical learning opportunity to a broader collection of developers. 2. Java Developer Day Tours Oracle will execute regional Java Developer Days with recognized Java User Groups (JUGs) with participation from Java Evangelist and Java Champions. This allows local, regional specific Java topics to be addressed both by Oracle and the Java community. In addition, Oracle will deliver more virtual technical content programs to reach developers where an existing JUG may not have a presence. 3. Sponsorship of Community-Driven Regional Events/Conferences Oracle also recognizes that improved community dialog and relations are achievable by continued Oracle sponsorship and onsite participation at both established/well-recognized 3rd party events and new emerging/growing 3rd party events. Oracle’s ultimate goal is to be an even better steward for Java by reaching more of the Java ecosystem with face-to-face and online community engagements. We look forward to planning tours and events with you, members of the Java community.

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  • Java doesn't show up in firefox plugins

    - by user857990
    I've just installed the newest java, because firefox blocks the old version. I used the tutorial from http://www.backtrack-linux.org/wiki/index.php/Java_Install Because I had some trouble once, I knew that there are multiple library folders, so I linked into all mozilla plugin folders that there are. /root/.mozilla/plugins /usr/lib/firefox/plugins/ /usr/lib/firefox-addons /usr/lib/mozilla/plugins /usr/lib64/mozilla/plugins java -version returns java version "1.7.0_07" Java(TM) SE Runtime Environment (build 1.7.0_07-b10) Java HotSpot(TM) 64-Bit Server VM (build 23.3-b01, mixed mode) But when I go to firefox plugins, it's not listed. What do I need to do, so that firefox recognizes java?

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