WeakHashMap boolean containsKey(Object key) method Example Program

Returns true if this map contains a mapping for the specified key.

Program

package com.candidjava;

import java.util.Map;
import java.util.WeakHashMap;
/* 
 * @author : Mohan 
 * @description : The containsKey(Object key) method is used to return true if this map contains a mapping for the specified key.
 */
public class WeakHashMapContainsKey {
	public static void main(String[] args) {
		Map weakHashMap = new WeakHashMap();
		weakHashMap.put("1", "anandh");
		weakHashMap.put("2", "hari");
		weakHashMap.put("3", "vinoth");
		weakHashMap.put("4", "kamal");
		weakHashMap.put("5", "karthic");
		System.out.println("Checking value for key 1 ="+ weakHashMap.containsKey("1"));
	}
}

Output

Checking value for key 1 =true

Explanation

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