Chapter 21.5, Problem 21.5.3CP

Program Plan Intro

Program:

//import the util package

import java.util.*;

//class Definition

public class Test {

// main method

public static void main(String[] args) {

//declare a LinkedHashMap

Map<Integer, String> map = new LinkedHashMap<>();

//insert keys and values into the map

map.put("123", "John Smith");

map.put("111", "George Smith");

map.put("123", "Steve Yao");

map.put("222", "Steve Yao");

//print elements present in the map

System.out.println("(1) " + map);

/*print elements in a new Treemap which implements map */

System.out.println("(2) " + new TreeMap<, String>(map));

//check if key equals 123 then print the value

map.forEach((k, v) -> {

if (k.equals("123"))

System.out.println(v);});

}

}