Java IdentityHashMap containsValue() method

Use the containsValue() method to check for the existence of a value. First, create a IdentityHashMap −

Map<String, Integer> m = new IdentityHashMap<String, Integer>();

Add some elements −

m.put("1", 100); m.put("2", 200); m.put("3", 300); m.put("4", 150); m.put("5", 110); m.put("6", 50); m.put("7", 90); m.put("8", 250); m.put("9", 350); m.put("10", 450);

Now check for the existence of a value −

m.containsValue(100))

The following is an example to implement containsValue() method −

Example

 Live Demo

import java.util.*; public class Demo {    public static void main(String[] args) {       Map<String, Integer> m = new IdentityHashMap<String, Integer>();       m.put("1", 100);       m.put("2", 200);       m.put("3", 300);       m.put("4", 150);       m.put("5", 110);       m.put("6", 50);       m.put("7", 90);       m.put("8", 250);       m.put("9", 350);       m.put("10", 450);       System.out.println("IdentityHashMap elements\n"+ m);       System.out.println("Is value 100 in the Map? " + m.containsValue(100));    } }

Output

IdentityHashMap elements {2 = 200, 4 = 150, 9 = 350, 7 = 90, 10 = 450, 6 = 50, 5 = 110, 8 = 250, 1 = 100, 3 = 300} Is value 100 in the Map? true