void (String[] args) { int size; HashSet collection = new HashSet(); // The following fragement must not be formatteed String str1 = "Yellow", str2 = "White", str3 = "Green", str4 = "Blue"; // end of fragment Iterator iterator; // do not format the following: collection.add( str1 ); collection.add( str2 ); collection.add( str3 ); // end of fragment collection.add(str4); iterator = collection.iterator(); while (iterator.hasNext()) { System.out.print(iterator.next() + " "); } }