Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.HashMap;
import java.util.Map;

public class Main {
    public static void main(String[] a) {

        Map<String, String> map = new HashMap<String, String>();
        map.put("key1", "value1");
        map.put("key2", "value2");
        map.put("key3", "value3");

        System.out.println(map.get("key2"));
        System.out.println(map.containsKey("key2"));
        System.out.println(map.containsKey("key4"));
    }
}