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Editorial Team
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Asked: 2026-05-26T19:58:08+00:00

I have an eclipse project where the source output must comply with version 1.3

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I have an eclipse project where the source output must comply with version 1.3 of the Java language specification

  • /src/ (must run on a Java 1.3 JRE)
  • /test/ (must run on a Java 1.6 JRE)

The application will run on a java 1.3 JRE (phoneME J2ME Advanced profile, if anyone is curious), while the test code uses JUnit 4, Mockito, etc… and so requires running on a JRE supporting java 1.5 or higher.

I can only seem to configure java language levels on a per-project basis, nothing more granular. At this stage I have set the project language level to 1.6, and use a Makefile to build the final jar with java 1.3 as the target.

Is there a way to have my cake and eat it? Is there a way to set up multiple language levels (and system libraries) within a single project? The only other option I can think of is to split the test code into its own project, which feels like a kludge.

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1 Answer

  1. Editorial Team

    I don’t think this is possible within a single project. But it should be easy to separate the test part out into a second project, that depends on the original.

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