I recommend assuming root priviliges, then
1) put them somewhere sensible like /usr/java
2) chmod 755 *bin if necessary
3) run each one and accept the license agreements
4) symlink the required applications into your own bin folder eg ~/bin/
OR symlink them into a generic bin folder eg /usr/bin
In particular you will need javac to compile your .java sources.
For browser support, you will need to copy the .so file, (or create a link to it) into the plugins folder of your preferred browser. Much the same process as installing the Flash plugin..
that should get you started