WeakHashMap remove(Object key) method Example Program

Removes the mapping for a key from this weak hash map if it is present. More formally, if this map contains a mapping from key k to value v such that (key==null ? k==null : key.equals(k)), that mapping is removed. (The map can contain at most one such mapping.)

Program

package com.candidjava;

import java.util.Map;
import java.util.WeakHashMap;

/* 
 * @author : Mohan 
 * @description : The remove(Object key) method is used to remove the mapping for this key from this map if present.
 */
public class WeakHashMapRemove {
	public static void main(String[] args) {
		Map<String, String> weakHashMap = new WeakHashMap<String, String>();

		weakHashMap.put("1", "anandh");
		weakHashMap.put("2", "hari");
		weakHashMap.put("3", "vinoth");
		weakHashMap.put("4", "kamal");
		weakHashMap.put("5", "karthic");
		weakHashMap.put("6", "mohan");
		System.out.println("Map: " + weakHashMap);
		System.out.println("Returned value: " + weakHashMap.remove("2"));
		System.out.println("New Map: " + weakHashMap);
	}
}

Output

Explanation

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