Passing a method to a method

Question

Hi all, is it possible for me to pass a method to a method? Or to somehow store a method as a variable or an object or in something? I'm sorry if I sound vague, I am kind of confusing myself with this question. I basically want a method to take a method to use in its method, but the method could be one of three methods.

Answer 1

I agree, reflection should be a last resort. An
interface would not be useful if you don't know what
method you want to invoke at compile time. Interfaces
are useful when you know the method you want to
invoke, but not the class.That's not true. This is a really lame-ass example but it shows the point.
public interface RuntimeMethod
   public void method();
class AClass {
   public static void main(Sting[] args)
      new AClass.handleAtRuntime(
         Factory.getRuntimeMethod(Integer.parse(args[0])));
   public void handleAtRuntime(RuntimeMethod runtime)
      runtime.method();
class Factory
   public static getRuntimeMethod(int method)
      switch(method)
         case 0: return new RuntimeMethod
            public void method()
               methodA();
         case 2: return new RuntimeMethod
            public void method()
               methodB();
         default:
            throw new IllegalArgumentException("bad input");
}