What's ANT version to run Java 6 projects?

Question

I have many legacy java 6 projects and I need to build it.

Using Eclipse Neon Ant plugin with Java 8 is building the jar, but when I use the generated jar with another Java 6 project, I have the problem 'Unsupported major.minor version 52.0'.

My solution is install Ant version compatible with Java 6 and build the project out of Eclipse.

It is not an ant-version problem. You have to configure ant that it is used the correct jdk-version — Jens, Oct 28 '16 at 10:51
have a look in to this post http://stackoverflow.com/questions/10382929/how-to-fix-java-lang-unsupportedclassversionerror-unsupported-major-minor-versi — Zia, Oct 28 '16 at 11:03

score 1 · Accepted Answer · edited Sep 01 '18 at 13:57

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It doesn't matter what version of Ant you use or what version of Java it was compiled with.

What matters is the JDK that the Ant javac task uses and the values of the source and target arguments of the javac task.

When running Ant from Eclipse you can set the JDK used in the 'JRE' tab of the 'Ant Build' you are using in the 'Run > External Tools Configuration' dialog. Choose a Java 6 JDK.

Specify source="1.6" target="1.6" on the javac task in your Ant build.xml.

edited Sep 01 '18 at 13:57

The Impaler

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answered Oct 28 '16 at 13:01

greg-449

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wrong! Ant 1.10.x requires java 1.8 or higher. – ulab Aug 16 '18 at 13:50
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ulab, you are correct. Downvoting this answer. Ant 1.9 runs on Java 6. Ant 1.10 requires Java 8. – The Impaler Sep 01 '18 at 01:43
@TheImpaler The question is about what version of Ant you need to run the 'javac' task at different compiler compliance levels - not about what version of Java Ant itself needs to run. – greg-449 Sep 01 '18 at 06:35
@greg449 OK, I got it wrong. You are right about compiling. – The Impaler Sep 01 '18 at 13:58

What's ANT version to run Java 6 projects?

1 Answers1