Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

public class Main {
    public static void main(String[] args) {
        WeakHashMap<String, String> weakHashMap = new WeakHashMap<String, String>();

        System.out.println("Putting values into the Map");
        weakHashMap.put("1", "first");
        weakHashMap.put("2", "two");
        weakHashMap.put("3", "from java2s.com");

        // checking Map
        System.out.println("Map: " + weakHashMap);

        // putting value at key 2
        String str = (String) weakHashMap.put("2", "newvalue");
        System.out.println("Returned value: " + str);
        System.out.println("New Map: " + weakHashMap);
    }
}