JAVA Swing and AWT applications freezing in Ubuntu

Now I had been facing this problem from quite some time, but recently found a quick solution. Well, by default, the system uses GIJ as the Java byte interpretor and possibly, it causes the applications to freeze. I had installed the sun-java-6 jdk package but it was not functional because gij was the default one.\ \ Steps:\ \ 1. Install the sun-java6-sdk package.\ 2. Find the default jvm being used by your machine by typing: java -version\ 3. In case it shows ‘gij’, then type: sudo update-alternatives –config java\ It would list all the possible options with a number corresponding to each. For me it shows:\ \ There are 5 alternatives which provide `java’.\ \ Selection Alternative\ ———————————————–\ 1 /usr/bin/cacao\ * 2 /usr/lib/jvm/java-6-sun/jre/bin/java\ 3 /usr/lib/jvm/java-1.5.0-sun/jre/bin/java\ 4 /usr/bin/gij-4.3\ + 5 /usr/lib/jvm/java-gcj/jre/bin/java\ \ Press enter to keep the default[*], or type selection number:\ \ 4. Type in the corresponding number to java-6-sun/jre/bin/java, and press return.\ \ \ That’s all… unsure the version of java again by typing th command in step 2, hopefully you will see something different :)