作者:走过滴岁月688 | 来源:互联网 | 2023-05-19 00:28
packageMap.Demo;importjava.util.HashMap;importjava.util.Iterator;importjava.util.Set;
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 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 keySet=hm.keySet();
// Iterator it=keySet.iterator();
Iterator 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);
}
}
}