I don't have an answer, but some questions. My apologies if they sound like "is the computer plugged in?", but it can't hurt to check the simple things first.

How did you do the installation?
Do you know how to use the "find" command to locate where the new version was placed?

What do you get from `which java` ? Is it something simple like /usr/bin/java, or something more complicated that includes version names? Sometimes people end up putting locations to packages in their search paths in such a way that a new installation is ignored.