Java HashMap 储存自定义对象

package Map.Demo;import java.util.HashMap;import java.util.Iterator;import java.util.Set;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储存到map集合中 *   *   */HashMap<Students, String> hm=new HashMap<>();hm.put(new Students("lisi", 38),"北京");hm.put(new Students("zhaoliu", 24),"上海");hm.put(new Students("xiaoqiang", 31),"沈阳");hm.put(new Students("wangcai", 28),"大连");hm.put(new Students("zhaoliu", 24),"铁岭");//Set<Students> keySet=hm.keySet();//Iterator<Students> it=keySet.iterator();Iterator<Students> it=hm.keySet().iterator();//等于前两句while(it.hasNext()) {Students key=it.next();String value=hm.get(key);System.out.println(key.getName()+":"+key.getAge()+"---"+value);}} }