My project is build in 1.4.2 JDK. Now it is going to interact with a third party jar, build in JDK 1.6 I am getting compatibility problem while using client classes. Is it possible to resolve it without upgrading my JDK to 1.6 or rebuilding third party jar in 1.4.2 ...
Hi all, I have installed windows 7 x64, therefore i have a confusion whether i have to install JDK x64 or JDK x86? please help me, thank you ...
I found that Java 6 includes Rhino JS (except for one or two minor pieces), as javax.script. Pretty cool! Does a Java 6 install (JRE or JDK, either) contain a binary that I can simply point to a .js file to run? (I think it would be great to be able to provide source code for others to read and run, without compilation, and require on...
I have a JTable extension that has been in use since Java 1.3/1.4 in the project that provided things like column reordering and sorting by clicking on the column. We are upgrading to Java 1.6, and the new JTable stops the old sorting code from working. It would be somewhat extensive rework to fit everything to the new JTable API. Until ...
From PMD: IntegerInstantiation: In JDK 1.5, calling new Integer() causes memory allocation. Integer.valueOf() is more memory friendly. ByteInstantiation: In JDK 1.5, calling new Byte() causes memory allocation. Byte.valueOf() is more memory friendly. ShortInstantiation: In JDK 1.5, calling new Short() causes memory allocati...
I am just trying to compile and run a very simple test program, but it simply will not work, and I have no idea what the problem is. I have a java project that's been heaped on me, and I know little to nothing about java. Especially compiling from the windows command line. I have two Jars that I need to compile a simple "hello world"...
I have read that HttpURLConnection supports persistent connections, so that a connection can be reused for multiple requests. I tried it and the only way to send a second POST was by calling openConnection for a second time. Otherwise I got a IllegalStateException("Already connected"); I used the following: try{ URL url = new URL("http:...
Hello, Just to inform GWT developers, GWT 2.0.3 and 2.0.4 does not work in Intellij with JDK 1.6.0_20. Why is this? No error, no nothing, just no output of gwt in war. Me thinks Oracle has done something bad again. ...
I'm using JDK1.6. When I implement an interface and in the implementing class, if I give @override before my function names, Eclipse throws an compilation error. i.e. below code is wrong according to Eclipse. public class SomeListener implements ServletContextListener { @Override public void contextDestroyed(ServletContextEvent ...
I've built a JAR file and it executes fine on my PC (XP) which has Eclipse installed. It also works on another PC, which also has Eclipse. I've tried running it on another PC(XP) that does not have Eclipse. Though it contains the JDK and multiple JRE. The JAR file just does not execute by clicking or from the command prompt. I am not ...
Hi, I downloaded the jdk-6u21-linux-x64-rpm.bin from Sun and installed the Java. During execution the rpm which got extracted is jdk-6u21-linux-amd64.rpm. I am trying to build an application which requires libjvm.so. And in the above JDK it is found in /usr/java/jdk1.6.0_21/jre/lib/amd64/server/libjvm.so As a result , I am getting a c...
I'm looking for a technique to find out the Garbage Collection (GC) strategy (collector) the Java VM is using at a given point of time. (Later on, I'd like it to correctly reflect the strategy that I choose, say XX:+UseConcMarkSweepGC.) verbose:gc (in its basic form) does not help as it just shows me what all it did with each generation...
i've create a project/class file in Eclipse Helios using JDK1.6. I had let the eclipse to generate the code for the implementation class of an Interface. public interface Foo { void bar(); } public class FooImpl implements Foo { @Override public void bar() { } } So for so good. Now for some reason, I've imported the p...
I'm running an application server which uses quite a bit of memory (there are quite a few users). It's running on an 18 GB EC2 instance. I pass these GC parameters to the VM: -server -XX:GCTimeRatio=19 -Xmx12g -XX:+PrintGCDetails -XX:+PrintGCTimeStamps The server works fine for awhile (as well as you'd expecte without concurrent GC) ...
:~$ !529 Desktop/./jdk-6u21-linux-i586-rpm.bin Unpacking... Checksumming... Extracting... UnZipSFX 5.50 of 17 February 2002, by Info-ZIP ([email protected]). inflating: jdk-6u21-linux-i586.rpm inflating: sun-javadb-common-10.5.3-0.2.i386.rpm inflating: sun-javadb-core-10.5.3-0.2.i386.rpm inflating: sun-javadb-client-10.5.3...
Somehow, I'm getting a null pointer exception here with JDK 1.6.0_14: HttpSession session = request.getSession(true); LinkedList<MyObject> list = (LinkedList<MyObject>) session.getAttribute(MY_LIST_KEY); .... list.addFirst( new MyObject(str1, str2, map) ); Then, I get this: at java.util.LinkedList.addBefore(LinkedList.java:779) He...
My work project needs to be compiled and run under JDK1.5 and I'm on a Mac. I followed the instructions here to get 1.5 back on Snow Leopard, and it works fine when building from IntelliJ IDEA, or if I'm just in the same directory as the build.xml and try "ant CleanRebuild" When I "Run Target" in NetBeans they're all compiled with the ...