java.util.IdentityHashMap.remove() 方法

package com.codingdict;

import java.util.*;

public class IdentityHashMapDemo {
   public static void main(String args[]) {

      // create identity hash
      IdentityHashMap ihmap = new IdentityHashMap();

      // populate the ihmap
      ihmap.put(1, "java");
      ihmap.put(2, "util");
      ihmap.put(3, "package");

      System.out.println("Value of ihmap before: " + ihmap);

      // remove element at key 2
      ihmap.remove(2);

      System.out.println("Value of ihmap after remove: " + ihmap);
   }    
}