The IBM iSeries (System i) JDK Juggle

While installing the Oracle Server Manager agent, we learned some interesting little Java tricks on the IBM iSeries. They probably work on all platforms, but I don’t know for sure and I’m not going to take the time to test. Also, these tips are for OS400 V5R4.

  • How do you know which version of JDK is your systems default?
    runjva class(*VERSION)
  • If you have more than one JDK installed, how can you force it to run a certain version?
    runjva class(*VERSION) prop((java.version 1.5))

These couple little tricks may seem pretty simple to you.
However, for someone without Java experience, especially on the iSeries, they can be very helpful.

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