Hands-On Design Patterns with Java

Programming the design pattern

The first part of our source code includes import statements for ArrayList and Iterator. In the main() method, we create a colonies ArrayList of strings. We then populate 12 elements to the ArrayList:

import java.util.ArrayList;import java.util.Iterator;public class IteratorExample {    public static void main(String[] args) {        ArrayList<String> colonies = new ArrayList<>();        colonies.add("Aerlion");        colonies.add("Aquaria");        colonies.add("Canceron");        colonies.add("Caprica");        colonies.add("Gemenon");        colonies.add("Leonis");        colonies.add("Libran");        colonies.add("Picon");        colonies.add("Sagittaron");        colonies.add("Scorpia");        colonies.add("Tauron");        colonies.add("Virgon");

The second half of the source code does three ...