Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.HashMap;
import java.util.Set;

public class Main {
    public static void main(String args[]) {
        HashMap<Integer, String> newmap = new HashMap<Integer, String>();

        // populate hash map
        newmap.put(1, "tutorials");
        newmap.put(2, "from");
        newmap.put(3, "java2s.com");

        // get keyset value from map
        Set keyset = newmap.keySet();

        // check key set values
        System.out.println("Key set values are: " + keyset);
    }
}