Ralph Soika

After I installed Ubuntu 8.04 I was surprised that now OpenJDK and also Sun JDK 1.6.0_06 is available via Synaptic apt-install

But STOP! If you need to work with Eclipse or Glassfish this will not help you!

Glassfish is not installable using OpenJDK 

And Eclipse 3.3.2 will not run with Sun JDK 1.6.0_06 

So what should you do? Do not use Synaptic and install JDK 1.6.0_03 manually.

1. Download JDK from the Sun Download Archive  http://java.sun.com/products/archive/
   chose JDK/JRE - 6  Version 6 update 3 (this version I have tested. Not sure if update 4 or 5 will also work)
2. copy 'jdk-6u3-linux-i586.bin' into /opt/java
3. install JDK
   >sudo ./jdk-6u3-linux-i586.bin
4. Now Change the standard link to java and java_vm in Ubuntu /usr/bin
   >sudo mv /usr/bin/java_vm java_vm_default
   >sudo mv /usr/bin/java java_default
   >sudo ln -s /opt/java/jdk1.6.0_03/bin/java /usr/bin/java
   >sudo ln -s /opt/java/jdk1.6.0_03/jre/bin/java_vm /usr/bin/java_vm

Ok now you can check your new installed Version of Java. Close all Terminal windows and check Java version with

>java -version

You should see :

java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode, sharing)

Finished! Now Eclipse and Glassfish will work