MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.util.Collections;
import java.util.Hashtable;
import java.util.Map;

public class MainClass {
    public static void main(String[] s) {
        Hashtable table = new Hashtable();
        table.put("key1", "value1");
        table.put("key2", "value2");
        table.put("key3", "value3");

        Map m = Collections.unmodifiableMap(table);

        m.put("key3", "value3");

        System.out.println(m);

    }
}