problem in ant build invalid target release

Question

problem in ant build

[javac] Compiling 86 source files to F:\\XXX\\classes
    [javac] javac: invalid target release: 1.6
    [javac] Usage: javac 

        

Answer 1

You use a compiler that cannot compile with -target 1.6 (javac: invalid target release: 1.6). Are you sure you use the JDK 1.6? Maybe a JDK 1.5 is installed and used by ant. Check the used Java-version with adding following line to your target (at the beginning):

It outputs the Java-version used by Ant.

You can set the compiler to use a different Java-version. You have to use the fork-attribute to use an external javac and specify which one you want:

Read the documentation of the javac-task for details.