For purposes of Java development is it better to have both the 32 and 64 bit versions of the SDK installed, or only one of them? Some programs require the 32 bit and some come in a version for each, like eclipse. When x64 Java first became available I began using it but found that some programs, like Vuze, required the 32 bit version. It seems odd that you would need 2 versions of the SDK and JVM installed on a machine. I¢d like to eliminate one of them but it seems that means the 32 bit would be the one to use since it¢s probably the most compatible. And that seems like moving backwards.