Some time ago I installed Oracle jdk7 and jre7 using java-installer under TC 5.x (I forget the exact version).
Look at the Info for java-installer in the Apps browser.
Double-check that you downloaded the correct Oracle Java version and file type (I blew this a couple times), should be:
jdk-7u51-linux-i586.tar.gz
and should be in /home/tc directory.
Then at /home/tc terminal prompt type:
sudo UPD=51 java-installer