import java.util.HashMap; public class testMain { /** * @param args */ public static void main(String[] args) { new testMain(); } public testMain(){ HashMap<Integer, String> arr = new HashMap<Integer, String>(); arr.put(3,"c"); arr.put(2,"b"); arr.put(4,"d"); arr.put(1,"a"); for(int key: arr.keySet()) System.out.println(key+"=>"+arr.get(key)); } }
1=>a 2=>b 3=>c 4=>d