hashmap.java

package HashMap;
import java.util.Iterator;
import java.util.HashMap;
import java.util.Map;

//public class hashmap {
//    public static void main(String[] args) {
////     ----------------------------Default Constructor------------------------------------
//        java.util.HashMap<Integer, String> hmap1 = new java.util.HashMap<>();
//        java.util.HashMap<Integer, String> hmap2 = new java.util.HashMap<>();
////     -----------------------------Add Ele by using Put method-------------------------
//        hmap1.put(1, "Sudhu");
//        hmap1.put(2, "Gill $");
//        hmap1.put(3, "Vishal");
//        hmap1.put(4, "Shubh");
//        hmap1.put(5, "Tarun");
//        System.out.println(hmap1);
////     -----------------------------Retrieve Ele by get method---------------------------
//        System.out.println(hmap1.get(1));
////     -----------------------------Retrieve Ele by getorDefault method----------------
//        System.out.println(hmap1.getOrDefault(5, "Not Exist"));
//     -----------------------------Getting only values------------------------------------
//        System.out.println(hmap1.values());
//        Iterator<hashmap.Entry<Integer, String>> itr = hmap1.entrySet().iterator();
//        while(itr.hasNext()) {
//            hashmap.Entry<Integer, String> entry = itr.next();
//            System.out.println("Key: " + entry.getKey() +", Value: " + entry.getValue() );
// }
//
//    }
//}