package com.yenange.test3;import java.util.HashMap; import java.util.Iterator; import java.util.Map;public class TestMap {   public static void main(String[] args) {     Map map=new HashMap();     map.put(1, 1);     map.put(5, 3);     map.put(2, 7);     map.put(6, 4);     Iterator iterator=map.keySet().iterator();     while (iterator.hasNext()) {       int key=(Integer)iterator.next();       System.out.println("鍵:"+key+"/t值:"+map.get(key));     }   } }