Question

Is it possible to specify a method as a method parameter?

e.g.

public void someMethod(String blah, int number, method MethodName)

Where MethodName is the name of a different method that needs to be specified.

Thanks

Answer 1

No, but you specify an interface with a single method. And you can pass an anonymous implementation to the method

interface CompareOp {
  int compare(Object o1, Object o2);
}

// Inside some class, call it Klass
public static int compare ( CompareOp comparator, Object o1, Object o2) {
   return comparator.compare(o1, o2);
}

Then you would call it like

Klass.compare( new CompareOp(){
  public int compare(Object o1, Object o2) {
    return o1.hashCode() - o2.hashCode();
  }
}, obj1, obj2 );