treeset addall 28 29 method in java

1import java.util.Iterator;
2import java.util.TreeSet;
3public class TreeSetAddAllMethodExample
4{
5   public static void main(String[] args)
6   {
7      TreeSet<Integer> ts1 = new TreeSet<Integer>();
8      TreeSet<Integer> ts2 = new TreeSet<Integer>();
9      // add in TreeSet ts1
10      ts1.add(23);
11      ts1.add(24);
12      ts1.add(25);
13      // add in TreeSet ts2
14      ts2.add(26);
15      ts2.add(27);
16      ts2.add(28);
17      // add ts2 to ts1
18      ts1.addAll(ts2);
19      // create an iterator
20      Iterator<Integer> iterate = ts1.iterator();
21      // displaying the Tree set data
22      System.out.print("TreeSet values: ");
23      while(iterate.hasNext())
24      {
25         System.out.print(iterate.next() + " ");
26      }
27   }
28}