Setting the target version of Java in ant javac

Question

I need to compile a jar file using ant (1.7.0) to run under a specific version of Java (1.5). I currently have Java 1.6 on my machine. I have tried setting:

Answer 1

To find the version of the java in the classfiles I used:

javap -verbose 

which announces the version at the start as

minor version: 0
major version: 49

which corresponds to Java 1.5