package devmanuals.com;

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

public class MapPut {
	public static void main(String args[]) {
		Map<Integer, String> mp = new HashMap<Integer, String>();
		mp.put(1, "A");
		mp.put(2, "B");
		mp.put(3, "C");
		mp.put(4, null);
		System.out.println("Elements in Map are : " + mp);
		System.out.println("Size of Map = " + mp.size());
		// Add the new element into the map;
		mp.put(5, "E");
		System.out.println("After putting the new element into map, Map = "
				+ mp);
		System.out.println("Size of Map = " + mp.size());
		String s1 = mp.put(5, "F");
		String s = mp.put(4, "D");
		// In the next implementation of put()method the old value will be
		// replaced
		// by new value
		System.out.println("Replaces the old value ");
		System.out.println(mp);
		System.out.println("Size of Map = " + mp.size());
		System.out.println("The previous value of 4 was " + "'" + s + "'");
		System.out.println("The previous value of 5 was " + "'" + s1 + "'");
		// insert a new element into map
		String s2 = mp.put(6, "G");
		System.out.println(mp);
		System.out.println("The previous value of 6 was " + "'" + s2 + "'");
	}
}