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: {}