Looping through ArrayList using enums?

Newbie & Debugging Questions
#1

I’m having trouble creating a method which loops through an ArrayList of multiple types of objects.

Here’s my failed attempt:

import java.util.ArrayList;

public class DebugObjects {

	public enum Block {
		Solid, Bad, Bounce
	}

	public static void debug(ArrayList<Block> list) {

		for (Block b : list) {

			String n = b.getClass().getName();
			byte i = (byte) Solid.list.indexOf(b);

			if (b.X < 0) {
				System.out.println(n + " " + i + " is outside the left side.");
			}
			if (b.X + b.W > Game.WH) {
				System.out.println(n + " " + i + " is outside the right side.");
			}
			if (b.Y < 0) {
				System.out.println(n + " " + i + " is outside the up side.");
			}
			if (b.Y + b.H > Game.WH) {
				System.out.println(n + " " + i + " is outside the down side.");
			}

		}

	}

}

My goal with this is to be able to call the method like this:
DebugObjects.debug(Solid.list);
This would loop through all Solid objects inside of Solid.list and tell me if any of them exceed the game window.

Thanks in advance!