Running JDK 1.2 and 1.3 at the same machine

Can I run two versions of JDK at the same machine? IS there any drawback of doing this?
thanks,
Jun Xiao
LDMI
313-972-8088

i have jdk's 1.1, 1.2, 1.3.1_04 and 1.4.0_01 and jre's 1.3.1_01, 1.3.1_04 and 1.4.0_01 installed on my machine without problems.
but as the last post indicates it can get confusing some times.
i use batch files for different builds to set the path as needed.
the only issue I know of where I can't switch from one to another is in my browser where i have the (last installed) 1.4 runtime but i can use the different appletviewers for testing in this case.
in case anyone is wondering why i have all these installed. i use
1.1 for some applets because if you can get away with just this people generally don't need the plug-in.
1.2 is old but sometimes i use it for some stuff for servers that don't have anything newer
i.4 is what i use normally
1.3 i need to use the ActiveX bridge and packager which was removed in 1.4 but is coming back for the next release.

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