Build in multiple java versions using Ant

Hi,

I have a project written in NetBeans 6.1 that I need to be able to compile on demand using any JDK version from 1.4.2, on a machine that does not have NetBeans installed (but does have Ant of course). The app compiles under 1.4.2 and up using the Ant xml files generated by NetBeans. At the moment, the options are 1.4.2/1.5/1.6 as they are the JDKs that are installed on the machine. The application uses Swing so has a couple of dependant jars.

Modifying the xml build files is not an option. Specifying a properties file from the Ant command-line is fine, and I have had to do this anyway (as well as copying the swing and NetBeans copylibs jars to the machine). The file is autogenerated and is created automatically before calling Ant.

Are there properties I can add to my properties file to specify which version of the SDK to compile with? Any other suggestions?

Using Windows.
Current properties file, used with ant -v -propertyfile temp.properties jar:
 
libs.swing-app-framework.classpath=appframework-1.0.3.jar;swing-worker-1.1.jar
libs.CopyLibs.classpath=org-netbeans-modules-java-j2seproject-copylibstask.jar

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scuzzieAsked:
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szigetiCommented:
Hi Scuzzie,

Let's say your build machine is running JDK 1.6, and Ant 1.7. You want to build classes you can distribute to clients running 1.4.2, 1.5, and 1.6 JREs respectively.:

Please note:
1. You cannot use any 1.6 specific functionality in your code, as that is not availabe in 1.5 and 1.4.2 clients.
2. You need Ant 1.7 to do this.

For 1.4.2 set these properties in your file:
ant.build.javac.source=1.4
ant.build.javac.target=1.4

For 1.5 set these properties in your file:
ant.build.javac.source=1.5
ant.build.javac.target=1.5

For 1.6 set these properties in your file:
ant.build.javac.source=1.6
ant.build.javac.target=1.6
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