Program: How to iterate through HashMap?

Below example shows how to read add elements from HashMap. The method keySet() returns all key entries as a set object. Iterating through each key, we can get corresponding value object.

package com.java2novice.hashmap;

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

public class MyHashMapRead {
	public static void main(String a[]){
		HashMap<String, String> hm = new HashMap<String, String>();
		//add key-value pair to hashmap
		hm.put("first", "FIRST INSERTED");
		hm.put("second", "SECOND INSERTED");
		hm.put("third","THIRD INSERTED");
		System.out.println(hm);
		Set<String> keys = hm.keySet();
		for(String key: keys){
			System.out.println("Value of "+key+" is: "+hm.get(key));
		}
	}
}

{second=SECOND INSERTED, third=THIRD INSERTED, first=FIRST INSERTED}
Value of second is: SECOND INSERTED
Value of third is: THIRD INSERTED
Value of first is: FIRST INSERTED