Hash Map Contoh

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

/**
 * Collection dengan
 * Hash map
 *
 * @author Thomasdwi.a
 * @version 20201025
 */
public class hashMapContoh {
    public static void main (String [] args){

        HashMap<Integer, String> hm = new HashMap<Integer, String>();
        hm.put(101,"anwar");
        hm.put(102,"Amir");
        hm.put(103,"Amos");
        hm.put(null,"Zo");

        for (Map.Entry m : hm.entrySet()) {
            System.out.println(m.getKey()+" "+m.getValue());
        }
    }
}
/** Output:
 * null Zo
 * 101 anwar
 * 102 Amir
 * 103 Amos
 */