Added iteration logic.

double-dispatch/src/main/java/com/iluwatar/App.java

@@ -1,7 +1,16 @@
 package com.iluwatar;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class App {
 	
     public static void main( String[] args ) {
+    	List<GameObject> objects = new ArrayList<>();
+    	objects.add(new FlamingAsteroid(0, 0, 5, 5));
+    	objects.add(new SpaceStationMir(1, 1, 4, 4));
+    	objects.add(new Meteoroid(10, 10, 15, 15));
+    	objects.add(new SpaceStationIss(12, 11, 14, 15));
+    	objects.stream().forEach(o1 -> objects.stream().forEach(o2 -> { if (o1 != o2) System.out.println(String.format("%s -> %s", o1, o2)); } ));
     }
 }