Chapter 21.7, Problem 21.7.1CP

Program Plan Intro

Program:

//import util package

import java.util.*;

//class definition

public class Example_1

{

//main method

public static void main(String[] args)

  {

/* declare singleton set and add "Chicago" */

Set<String>set = Collections.singleton("Chicago");

//add Dallas into set

set.add("Dallas");

//print set

System.out.println("set is " + set);

  }

}