sudo update-alternatives --config java
one sentence work out . Awesome!
i love ubuntu!
there are some commands show information about jre ,jdk.
sudo update-java-alternatives
and you can add some param to show .
for example:
william@william-superstar:/VirtualWorld/eclipse$ sudo update-java-alternatives -l
[sudo] password for william:
java-6-sun 63 /usr/lib/jvm/java-6-sun
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