View difference between Paste ID: ai8zz1Jm and YtNgdnyj

 import java.util.ArrayList;
 
 public class Test {
 
 	public static void main(String[] args) {
 		new Test();
 	}
 
 	ArrayList<Button> list = new ArrayList<Button>();
 
 	int i;
 
 	Test() {
 		for (i = 0; i < 10; i++) {
 			Button b = new Button(i);
 			b.l = new Listener() {
 				@Override
 				public void trigger() {
 					System.out.println(i + "");
 				}
 			};
 			list.add(b);
 		}
 
 		for (Button b : list) {
 			b.l.trigger();
 		}
 	}
 
 	class Button {
 		int i;
 		Listener l;
 
 		Button(int i) {
 			this.i = i;
 		}
 
 		public void setListener(Listener l) {
 			this.l = l;
 		}
 	}
 
 	interface Listener {
 		public void trigger();
 	}
 }