WeakHashMap size() in Java

size(): This method is available in java.util.WeakHashMap class of Java.

Syntax:

int java.util.WeakHashMap.size()

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

Parameters: NA

Returns: the number of key-value mappings in this map.

Exceptions: NA

Approach

Java

import java.util.WeakHashMap;

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

        WeakHashMap<String, String> weakHashMap = 
           new WeakHashMap<String, String>();

        weakHashMap.put("Java", "Program");
        weakHashMap.put("Hello", "World");

        System.out.println(weakHashMap.size());

    }
}

Output:

2