Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

public class Main {
    public static void main(String[] s) {
        //object hash table 
        Hashtable<String, String> table = new Hashtable<String, String>();

        // populate the table
        table.put("key1", "value1");
        table.put("key2", "value2");
        table.put("key3", "from java2s.com");

        System.out.println("Initial collection: " + table);

        // create unmodifiable map
        Map<String, String> m = Collections.unmodifiableMap(table);

        // try to modify the collection
        m.put("key3", "value3");
    }
}