java.lang.System.currentTimeMillis() replace method

Question

Aside from recompiling rt.jar is there any way I can replace the currentTimeMillis() call with one of my own?

1# The right way to

Answer 1

You could use an AspectJ compiler/weaver to compile/weave the problematic user code, replacing the calls to java.lang.System.currentTimeMillis() with your own code. The following aspect will just do that:

public aspect CurrentTimeInMillisMethodCallChanger {

    long around(): 
       call(public static native long java.lang.System.currentTimeMillis()) 
       && within(user.code.base.pckg.*) {
         return 0; //provide your own implementation returning a long
    }
}