Install two version of Java....

[LAST FIRST <eulerkhc kmfms com>]

Dear everyone,
  I just wonder if it is possible to concurrently run two java-vm. I meant java 1.4.1 and 1.3.2. When I install after another, RH8.0 seems to think I have NO java at all! I suspect it maybe one java had "Replace" another! Is it a way that I install both version of them, and run a specific one both from command line and automatically by Mozilla-1.0.1 and Opera-6.11?
  Detail of my system: PIII733,832M RAM, 60G(10G for RH8.0) About 800M swap.

 Thanks in advance
 Regards
 eulerkhc
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