Java Collection Tutorial - Java WeakHashMap.remove(Object key)


WeakHashMap.remove(Object key) has the following syntax.

public V remove(Object key)


In the following code shows how to use WeakHashMap.remove(Object key) method.

//from   w ww.j  a v  a2 s .c  o m

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

public class Main {
   public static void main(String[] args) { 
      Map<String, String>  weakHashMap = new WeakHashMap<String, String> ();
      System.out.println("Putting values into the Map");
      weakHashMap.put("1", "first");
      weakHashMap.put("2", "two");
      weakHashMap.put("3", "from");
      // checking Map
      System.out.println("Map: "+weakHashMap);
      // remove value at key 2      
      System.out.println("Returned value: "+weakHashMap.remove("2"));
      System.out.println("New Map: "+weakHashMap);

The code above generates the following result.