java.util.WeakHashMap.size() Method

Description

The size() method is used to return the number of key-value mappings in this map.

Declaration

Following is the declaration for java.util.WeakHashMap.size() method.

public int size()

Parameters

• NA

Return Value

The method call returns the number of key-value mappings in this map.

Exception

• NA

Example

The following example shows the usage of java.util.WeakHashMap.size() method.

package com.tutorialspoint;

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

public class WeakHashMapDemo {
   public static void main(String[] args) { 
      Map<String, String> weakHashMap = new WeakHashMap<String, String>();
            
      // put keys and values in the Map
      System.out.println("Putting values into the Map");
      weakHashMap.put("1", "first");
      weakHashMap.put("2", "two");
      weakHashMap.put("3", "three");
      
      // checking the size of the Map
      System.out.println("Map size: "+weakHashMap.size());      
   }    
}

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

Putting values into the Map
Map size: 3