Well, this is the shortest chapter of them all, as I decided to give the standard OpenJDK a shot. Install it the simple way (through the command line) with:
$ sudo apt-get install icedtea6-plugin openjdk-6-jre openjdk-6-jdk ant
If you are using another operating system than Ubuntu, please visit http://www.oracle.com/technetwork/java/javase/downloads/index.html and download the appropriate installation package from there.
Observe that you need the "JDK" package. Only the "JRE" is not sufficient.
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