java-6 | 易学教程

Java: easiest way to package both Java 1.5 and 1.6 code

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问题 I want to package a piece of code that absolutely must run on Java 1.5. There's one part of the code where the program can be "enhanced" if the VM is an 1.6 VM. Basically it's this method: private long[] findDeadlockedThreads() { // JDK 1.5 only supports the findMonitorDeadlockedThreads() // method, so you need to comment out the following three lines if (mbean.isSynchronizerUsageSupported()) return mbean.findDeadlockedThreads(); else return mbean.findMonitorDeadlockedThreads(); } What would

Will Java 6 latest run JavaFX 2 out of the box

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问题 Since Java 7 isnt yet as popular as Java 6 I was wondering if I could use some stuff like WebView in latest update of Java 6 JRE out of the box, without having users download JavaFX on their system. 回答1: No, Java 6 will not run JavaFX 2 out of the box. If developing a new JavaFX application today I recommend targeting a minimum version of Java Runtime 7u9 for the following reasons. Java Runtime 6 and JavaFX for Java Runtime 6 are due to cease public distribution in February of 2013. Java

How can I create a netbeans 7.3 project wrapping the jedit source code?

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问题 I thought this is an easy question because there's already a wiki topic about this here especially this section. however the wiki is out of date. A prior question exists here on Stackoverflow that only has a reference to these now out of date wiki topics. The netbeans wiki must be for some older version of NetBeans UI, and I'm using NetBeans 7.3. If I try to use the existing sources option in 7.3 it assumes that you cannot have a build.xml already, and so it tells you you cannot proceed: For

cannot connect subclipse to VisualSVN on Windows 7

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svn: connection refused by the server svn: OPTIONS request failed on '/svn/myrepo/MyProject/trunk' svn: connection refused by the server Java 32 bit 1.6.20 Windows 7 64 bit Eclipse 3.5.2 32 bit VisualSVN 2.1.3 Installed subclipse in Eclipse 3.5.2. Created repository myrepo and Project Structure MyProject. Tried to open repository location https://desktop-PC/svn/myrepo/MyProject/trunk from subclipse and got error popup Error validating location org.tigris.subversion.javahl.ClientException: svn: connection refused by the server svn: OPTIONS request failed on '/svn/myrepo/MyProject/trunk' "" from

When should we use console class?

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问题 I was reading about Console class, and in the very first line, it was written New to Java 6 and when we are running Java SE 6 from command line, then we are typically using console class object So, which means we are implicitly using console class through the command line ?? Then, I started looking for more detail about Console class and I found Input from console class in java and Console link. So, concluded some points Console class are only usable outside the IDE using System.console()

How do I map the inner text content of an element to a Class property?

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Say I have the following XML and Java code respectively: <foo> My text content </foo> @XmlRootElement( name="foo" ) public static class Foo { // This is where I want to see "My text content" stored private String text; // getters and setters } When I tried marshalling the XML, my Foo instance doesn't get its text property populated with value from the inner text of my foo element in the given XML. How do I solve this? You can use the @XmlValue annotation. @XmlValue public String getText() { return text; } For More Information http://blog.bdoughan.com/2011/06/jaxb-and-complex-types-with-simple

Managed Mbeans from ManagementFactory in JDK1.6 - NotCompliantMBeanException:

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I was using ManagementFactory to get ManagedMbeans in JDK1.5 and JBOSS 4.X. Now wanted to move my same code to JDK 1.6. The Mbean part breaks throwing the exception Caused by: javax.management.NotCompliantMBeanException: Class does not expose a management interface: java.lang.Object Caused by: java.lang.Exception: Unable to register platform (JVM) MBeans with JBoss MBeanServer Here's 2 approaches: Make JBossAS use the platform MBeanServer . Create your own proxies that implement the MXBean interfaces (and have the *MBean compliant name in the interface) and delegate the calls to the actual

Jenkins Sonar plugin suddenly stops working

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问题 Our Jenkins builds started failing overnight with the error: [ERROR] Failed to execute goal org.codehaus.mojo:sonar-maven-plugin:2.7:sonar (default-cli) on project <project>: Execution default-cli of goal org.codehaus.mojo:sonar-maven-plugin:2.7:sonar failed: Unable to load the mojo 'sonar' in the plugin 'org.codehaus.mojo:sonar-maven-plugin:2.7' due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: org/codehaus/mojo/sonar/SonarMojo :

Downloading Multiple Files Parallelly or Asynchronously in Java

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Here I am trying to download multiple files one after another: Environment - Java 1.6 public List<Attachment> download(List<Attachment> attachments) { for(Attachment attachment : attachments) { attachment.setDownStatus("Failed"); String destLocation = "C:\Users\attachments"; try { String attUrl = attachment.getUrl(); String fileName = attachment.getFileName(); URL url = new URL(attUrl); File fileLocation = new File(destLoc, fileName); FileUtils.copyURLToFile(url, fileLocation); if(fileLocation.exists()) { attachment.setDownStatus("Completed"); } } catch(Exception e) { attachment.setDownStatus(

Dynamic Function Creation in Java

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So I'm trying to figure out if there is some method to dynamically create/assign a method to a class in Java. If it were C, I would just do it as follows using pointers: public class Foo { void bar(void *ptr) {....} }; int main() { Foo f = new Foo(); f.bar({"my function" ...}) } However, Java of course has no pointers, so is there any way to get a similar functionality out of a Java application? In Java, you would normally declare an interface with a method to be called. For example, if your function simply wants to execute some code, you would declare a Runnable and implement its run method.