java.util.IdentityHashMap.clear() Method

Description

The clear() method is used to remove all mappings from this map.

Declaration

Following is the declaration for java.util.IdentityHashMap.clear() method.

public void clear()

Parameters

NA

Return Value

NA

Exception

NA

Example

The following example shows the usage of java.util.IdentityHashMap.clear()

package com.tutorialspoint;

import java.util.*;

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

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

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

      System.out.println("Initial Map content: " + ihmap);

      // clear the map 
      ihmap.clear();

      System.out.println("Map content after clear: " + ihmap);
   }    
}

Let us compile and run the above program, this will produce the following result.

Initial Map content: {1=java, 3=package, 2=util}
Map content after clear: {}

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