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  • How to get Java Decompiler / JD / JD-Eclipse running in Eclipse Helios

    - by Universalspezialist
    Java Decompiler (JD) is generally recommended as a good, well, Java Decompiler. JD-Eclipse is the Eclipse plugin for JD. I had problems on several different machines to get the plugin running. Whenever I tried to open a .class file, the standard "Source not found" editor would show, displaying lowlevel bytecode disassembly, not the Java source output you'd expect from a decompiler. Installation docs in http://java.decompiler.free.fr/?q=jdeclipse are not bad but quite vague when it comes to troubleshooting. Opening this question to collect additional information: What problems did you encounter before JD was running in Eclipse Helios? What was the solution?

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  • Windows thumbnail preview with JNA (Java)

    - by rukoche
    W32API.HWND targetHwnd = User32.INSTANCE.FindWindow('SunAwtFrame', 'Frame') W32API.HWND sourceHwnd = User32.INSTANCE.FindWindow('triuiScreen', 'EVE') W32API.HANDLE thumbnailH = new W32API.HANDLE() NativeLibrary dwm = NativeLibrary.getInstance('dwmapi') dwm.getFunction('DwmRegisterThumbnail').invoke(targetHwnd, sourceHwnd, thumbnailH) gives me # A fatal error has been detected by the Java Runtime Environment: # # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x70f34bee, pid=7208, tid=7364 # # JRE version: 6.0_18-b07 # Java VM: Java HotSpot(TM) Client VM (16.0-b13 mixed mode, sharing windows-x86 ) # Problematic frame: # C [DWMAPI.DLL+0x4bee] I have a feeling I'm doing it completely wrong, but digging in documentation got me nowhere.

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  • Any recommended java profiling tutorial?

    - by Wing C. Chen
    Is there any recommended java application profiling tutorial? I am now using jProfiler and eclipse TPTP with my profiling. However, although equipped with wonderful weapons, as a newbie in java profiling, I am still missing the general theory and skill in pinpointing the bottleneck. So would you please provide me with some recommended tutorial for java profiling?

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  • Java: exception-throwing class?

    - by HH
    I have classes DirReader and Search. The search uses DirReader. I want the search to know when DirReader throws exception. So how can I have class throwing exception? Currently, I use initCorrect -dummy var. Exception-style method may be more appropriate. Simplified Example Error $ javac ExceptionStatic.java ExceptionStatic.java:4: '{' expected public class ExceptionStatic throws Exception{ ^ 1 error Code import java.util.*; import java.io.*; // THIS PART NEEDS TO BE FIXED: public class ExceptionStatic throws Exception{ private static boolean initCorrect = false; public static String hello; static{ try{ hello = "hallo"; //some other conditionals in real code if( true) throw new Exception(); initCorrect=true; }catch(Exception e){ e.printStackTrace(); } } public static void main(String[] args){ if(initCorrect) System.out.println(hello); } }

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  • Java File URI error ?

    - by Frank
    I need to get a file object online, and I know the file is located at : http://nmjava.com/Dir_App_IDs/Dir_GlassPaneDemo/GlassPaneDemo_2010_04_06_15_00_SNGRGLJAMX If I paste it into my browser's url, I'll be able to download this file, now I'm trying to get it with Java, my code looks like this : String File_Url="http://nmjava.com/Dir_App_IDs/Dir_GlassPaneDemo/GlassPaneDemo_2010_04_06_15_00_SNGRGLJAMX"; Object myObject=Get_Online_File(new URI(File_Url)); Object Get_Online_File(URI File_Uri) throws IOException { return readObject(new ObjectInputStream(new FileInputStream(new File(File_Uri)))); } public static synchronized Object readObject(ObjectInput in) throws IOException { Object o; ...... return o; } But I got the following error message : java.lang.IllegalArgumentException: URI scheme is not "file" at java.io.File.<init>(File.java:366) Why ? How to fix it ? Frank

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  • Facebook with RestFB (Java)

    - by Trick
    I just began to use this and I already stumbled on some from-my-side-strange errors. I am using RestFB jar. My problem is, that I can not get my session key (this is the start of everything :)). FacebookClient facebookClient = new DefaultFacebookClient(API_KEY, SECRET_KEY); try { String token = facebookClient.execute("auth.createToken", String.class, Parameter.with("null", "null")); System.out.println(token); String session = facebookClient.execute("auth.getSession", String.class, Parameter.with("auth_token", token)); System.out.println(session); } catch (FacebookException e) { e.printStackTrace(); } I get the token correctly. Parameter.with("null,"null") is there because it demands at least one, but method for creating token doesn't expect any. When trying to get the session key, I get the following error: com.restfb.FacebookResponseStatusException: Received Facebook error response (code 100): Invalid parameter at com.restfb.DefaultFacebookClient.throwFacebookResponseStatusExceptionIfNecessary(DefaultFacebookClient.java:357) at com.restfb.DefaultFacebookClient.makeRequest(DefaultFacebookClient.java:320) at com.restfb.DefaultFacebookClient.execute(DefaultFacebookClient.java:188) at com.restfb.DefaultFacebookClient.execute(DefaultFacebookClient.java:178) Documentation for getting session doesn't say any more parameters are required! Did anybody already try this JAR or do you have any other solution for Java? EDIT: Does the application needs to be "published" in searchers to be able to do this??

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  • Difference between Java SE/EE/ME?

    - by Richard Knop
    Which one should I install when I want to start learning Java? I going to start with some basics so I will create simple programs that create files, directories, edit XML files and so on, nothing too complex for now. I guess Java SE (Standard Edition) is the one I should install on my Windows 7 desktop? I already have Komodo IDE which I will use to write Java code.

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  • Is there a goto statement in java?

    - by Venkats
    I'm confused about this. Most of us have been told that there is no goto statement in Java. But I found that it is one of the keyword in Java. Where can it be used? If it can not be used, then why was it included in Java as a keyword?

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  • Java Simple Chat Box

    - by Allen
    I am trying to create a very simple chat window that simply has the ability to display some text, which i add to from time to time. However I get the following run time error when attempting to append text to the window: java.lang.ClassCastException: javax.swing.JViewport cannot be cast to javax.swing.JTextPane at ChatBox.getTextPane(ChatBox.java:41) at ChatBox.getDocument(ChatBox.java:45) at ChatBox.addMessage(ChatBox.java:50) at ImageTest2.main(ImageTest2.java:160) Here is the class to handle the basic operations: public class ChatBox extends JScrollPane { private Style style; public ChatBox() { StyleContext context = new StyleContext(); StyledDocument document = new DefaultStyledDocument(context); style = context.getStyle(StyleContext.DEFAULT_STYLE); StyleConstants.setAlignment(style, StyleConstants.ALIGN_LEFT); StyleConstants.setFontSize(style, 14); StyleConstants.setSpaceAbove(style, 4); StyleConstants.setSpaceBelow(style, 4); JTextPane textPane = new JTextPane(document); textPane.setEditable(false); this.add(textPane); } public JTextPane getTextPane() { return (JTextPane) this.getComponent(0); } public StyledDocument getDocument() { return (StyledDocument) getTextPane().getStyledDocument(); } public void addMessage(String speaker, String message) { String combinedMessage = speaker + ": " + message; StyledDocument document = getDocument(); try { document.insertString(document.getLength(), combinedMessage, style); } catch (BadLocationException badLocationException) { System.err.println("Oops"); } } } if there is a simpler way to do this, by all means let me know. I only need the text to be of a single font type, and uneditable by the user. Aside from that, I just need to be able to append text on the fly.

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  • Setting java.awt.headless=true programmatically

    - by reto
    I'm trying to set java.awt.headless=true during the application startup but it appears like I'm to late and the non-headless mode is already started: static { System.setProperty("java.awt.headless", "true"); /* java.awt.GraphicsEnvironment.isHeadless() returns false */ } Is there another way set headless=true beside -Djava.awt.headless? I would prefer to not configure anything on the console. Thanks! Reto

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  • Can you do icon overlays using Java on Windows OS

    - by Saviz
    I would like to manupilate badges or icon overlays using Java on windows. Basically some files on the drive to have overlays depending what state those files are in. This should be visible through windows explorer. Something simillar to how DropBox does things. Is that possible? I've seen several articles on this topic but none of them use Java. They all seem to use C++ or C# or COM objects. I was looking for a Java solution for windows. Of course I'd like to have a Java solution on Mac's too. Not sure if this is possible but before I give up I thought I ask.

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  • Compiling Java code in terminal having a Jar in CLASSPATH

    - by Masi
    How can you compile the code using javac in a terminal by using google-collections in CLASSPATH? Example of code trying to compile using javac in a terminal (works in Eclipse) import com.google.common.collect.BiMap; import com.google.common.collect.HashBiMap; public class Locate { ... BiMap<MyFile, Integer> rankingToResult = HashBiMap.create(); ... } Compiling in terminal src 288 % javac Locate.java Locate.java:14: package com.google.common.collect does not exist import com.google.common.collect.BiMap; ^ Locate.java:15: package com.google.common.collect does not exist import com.google.common.collect.HashBiMap; ^ Locate.java:153: cannot find symbol symbol : class BiMap location: class Locate BiMap<MyFile, Integer> rankingToResult = HashBiMap.create(); ^ Locate.java:153: cannot find symbol symbol : variable HashBiMap location: class Locate BiMap<MyFile, Integer> rankingToResult = HashBiMap.create(); ^ 4 errors My CLASSPATH src 289 % echo $CLASSPATH /u/1/bin/javaLibraries/google-collect-1.0.jar

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  • Java obfuscators

    - by jbu
    I'm looking for a good Java obfuscator. I've done initial research into the following Java obfuscators: proguard, yguard, retroguard, dasho, allatori, jshrink, smokescreen, jobfuscate, marvin, jbco, jode, javaguard, jarg, joga, cafebabe, donquixote, mwobfu, bbmug, zelix klassmaster, sandmark, jcloak, thicket, blufuscator, and java code protector. I tried proguard and it has a really nice GUI, seems really stable, and seems to be the most popular, but it seemed to not like some enumeration on a referenced jar file (not within the code I was trying to obfuscate) which was weird. Yguard seems to require some interaction with ant, which I didn't know too much about. What is a good java obfuscator? It doesn't need to be free, it just needs to work well and be easy to use.

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  • How to register a QueryExecuterFactory in jasper reports in java

    - by Bosso
    Hi, I implemented JRQueryExecuter and want to use it in a report. Using iReport I managed to register and use the executer. Now I want to use it in a java application, but I can't find any resources how to register the factory. I thought it's enough to have the implementation in the classpath, but I get the following exception: Caused by: net.sf.jasperreports.engine.JRException: No query executer factory class registered for tmql queries. at net.sf.jasperreports.engine.query.DefaultQueryExecuterFactoryBundle.getQueryExecuterFactory(DefaultQueryExecuterFactoryBundle.java:80) at net.sf.jasperreports.engine.util.JRQueryExecuterUtils.getQueryExecuterFactory(JRQueryExecuterUtils.java:57) at net.sf.jasperreports.engine.design.JRDesignDataset.queryLanguageChanged(JRDesignDataset.java:1006) Can anybody give me a hint? regards Hannes

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  • Reading inputs in java

    - by Gandalf StormCrow
    Hello everyone I'm trying to improve my Java skills by solving some problems from ACM, now the thing is my sample input looks like this : 3 100 34 100 75 250 27 2147483647 101 304 101 303 -1 -1 So at first I'm just trying to read them but its not working here is the java code: import java.io.BufferedInputStream; import java.util.Scanner; public class Main { public static void main(String args[]) { Scanner stdin = new Scanner(new BufferedInputStream(System.in)); while (stdin.hasNext()) { System.out.println(stdin.nextInt() + " and the next " + stdin.nextInt()); } } } I'm trying to send these inputs as an argument, and not by reading them from file, here is how: The program just spins(executes) but not printing anything. How can I fix this?

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  • Java operator precedence guidelines

    - by trashgod
    Misunderstanding Java operator precedence is a source of frequently asked questions and subtle errors. I was intrigued to learn that even the Java Language Specification says, "It is recommended that code not rely crucially on this specification." JLS §15.7 Preferring clear to clever, are there any useful guidelines in this area? Here are a number of resources on the topic: JLS Operators JLS Precedence Java Glossary Princeton Sun Tutorial University of West Florida Usenet discussion Additions or corrections welcome.

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  • "java.lang.ClassNotFoundException: javax.ejb.EJBObject" when running JAR

    - by Bernhard V
    Hi, I'm getting a "java.lang.ClassNotFoundException: javax.ejb.EJBObject" error when I'm running my application as a JAR file. When running it in Eclipse everything is working fine. The application properly access the main class and the main method. But when it tries to load the application context it cannot resolve a reference to an EJB bean. I then get the following error: Error creating bean with name 'bc' defined in class path resource [blabla.xml]: Initialization of bean failed; nested exception is java.lang.NoClassDefFoundError: javax/ejb/EJBObject at org.springframework.beans.factory.support.BeanDefinitionValueResolver .resolveReference(BeanDefinitionValueResolver.java:275) ... Caused by: java.lang.ClassNotFoundException: javax.ejb.EJBObject I've included all runtime-scoped dependencies with Maven in the JAR file. Do you know any further information regarding this error?

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  • Setting classpath java for use in Runtime.exec

    - by phil swenson
    I am trying to spawn a process using Runtime.exec. I want to use my current classpath : System.getProperty("java.class.path") Unfortunately, I am having all kinds of issues. When it works on my mac, it doesn't work on Windows. And doesn't work on my mac ever when there is a space in the classpath. The error I always get is ClassDefNotFound, so it's related to how I'm building and passing in the classpath. here is some sample code: String startClass = "com.test.MyClass" String javaHome = System.getProperty("java.home"); String javaCmd = javaHome + "/bin/java"; String classPath = "-Djava.class.path=" + System.getProperty("java.class.path"); String[] commands = new String[]{javaCmd, classPath, startClass}; String commandString = StringUtils.join(commands, " "); Process process = Runtime.getRuntime().exec(commandString); So, how should I setup the classpath? Thanks for any help

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  • Java JMS Messaging

    - by London
    Hello, I have a working example of sending message to server and server receiving it via qpid messaging. Here is simple hello world to send to server : http://pastebin.com/M7mSECJn And here is server which receives requests and sends response(the current client doesn't receive response) : http://pastebin.com/2mEeuzrV Here is my property file : http://pastebin.com/TLEFdpXG They all work perfectly, I can see the messages in the qpid queue via Qpid JMX management console. These examples are downloaded from https://svn.apache.org/repos/asf/qpid/trunk/qpid/java/client/example (someone may need it also). I've done Jboss messaging using spring before, but I can't manage to do the same with qpid. With jboss inside applicationsContext I had beans jndiTemplate, conectionFactory, destinationQueue, and jmscontainer like this : <!-- Queue configuration --> <bean id="jndiTemplate" class="org.springframework.jndi.JndiTemplate"> <property name="environment"> <props> <prop key="java.naming.factory.initial">org.jnp.interfaces.NamingContextFactory</prop> <prop key="java.naming.provider.url">jnp://localhost:1099</prop> <prop key="java.naming.factory.url.pkgs">org.jboss.naming:org.jnp.interfaces</prop> <prop key="java.naming.security.principal">admin</prop> <prop key="java.naming.security.credentials">admin</prop> </props> </property> </bean> <bean id="connectionFactory" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiTemplate" ref="jndiTemplate" /> <property name="jndiName" value="ConnectionFactory" /> </bean> <bean id="queueDestination" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiTemplate" ref="jndiTemplate" /> <property name="jndiName"> <value>queue/testQueue</value> </property> </bean> <bean id="jmsContainer" class="org.springframework.jms.listener.DefaultMessageListenerContainer"> <property name="connectionFactory" ref="connectionFactory" /> <property name="destination" ref="queueDestination" /> <property name="messageListener" ref="listener" /> </bean> and of course sender and listener : Now I'd like to rewrite this qpid example using spring context logic. Can anyone help me?

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