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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