Java 1.5 and Java 1.6

[mario2409]

Can both of them be installed on the same machine? If so, how can I install 1.5 in an ubuntu machine with 1.6 already installed. I ask this because I am writing a java program in eclipse which should only work under 1.5. Any help would be appreciate it.

[nanotube]

yes you can, just open synaptic and select the packages.

[mario2409]

I did look for java 1.5, and selected java-package which supposly contains 1.5. It installed sucessfully but once I tried to create a project in eclipse and I try to select a different JRE it doesn't show 1.5 :( And I did try for Eclipse to look for different JREs installed and no sucess, any suggestions?

[nanotube]

ok, so the java5 package would be called "sun-java5-jdk"

the binaries would go here i think:
/usr/lib/jvm/java-5-sun/jdk/bin/

so you can find your javac in there, and that would be the java5

your java6 would of course be in
/usr/lib/jvm/java-6-sun/jdk/bin/

your /default/ javac would be in /usr/bin/javac, and will point to /etc/alternatives/javac

you can change your default java by using "sudo update-alternatives javac"

or you can just use java5 javac directly by funding it in that dir i posted above.

hope that helps.