import java.util.HashMap;

 import java.util.Iterator;

 import cn.itcast.p2.bean.Student;

 public class HashMapDemo {

     public static void main(String[] args) {

         /*

          * 将学生对象和学生的归属地通过键与值存储到map集合中

          */

         HashMap<Student,String> hm = new HashMap<Student,String>();

         hm.put(new Student("lisi",38), "北京");

         hm.put(new Student("zhaoliu",24), "上海");

         hm.put(new Student("xiaoqiang",31), "沈阳");

         hm.put(new Student("wangcai",38), "大连");

         hm.put(new Student("zhaoliu",24), "铁岭");

         Iterator<Student> it = hm.keySet().iterator();

         while (it.hasNext())

         {

             Student key = it.next();

             String value = hm.get(key);

             System.out.println(key.getName()+":"+key.getAge()+"--"+value);

         }

     }

 }