Getting a field value in the calling class

Hi

I have written two classes hoping to find out in run time the value of
a field in the calling class. But my attempt resulted in a run time
error. Anyone could help fix my code or suggestion? Thank you!

Jan
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public class GetCallingClass {
    void printCallingClassInfo() throws ClassNotFoundException,
            SecurityException, NoSuchFieldException, IllegalArgumentException,
            IllegalAccessException {
        StackTraceElement[] ste = new Throwable().getStackTrace();
        if (ste.length > 1) {
            System.out.println(ste[1].getClassName()); // print CallClass

System.out.println(CallClass.class.getField("m").toGenericString());
            Class c = ste[1].getClass();
            Integer m2 = (Integer)
CallClass.class.getField("m").get(ste[1].getClass());
            System.out.println("m2 = "+m2);
            System.out.println(this.getClass().getGenericSuperclass()
                    .getClass().getName()); // print java.lang.Class
        }
    }
}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

public class CallClass {
    public int m = 0;
    public static void main(String[] args) throws SecurityException,
ClassNotFoundException, NoSuchFieldException,
IllegalArgumentException, IllegalAccessException {
        GetCallingClass c = new GetCallingClass();
        c.printCallingClassInfo();
    }
}
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