public class User {
int id;
String name;
double money;
public User(int id,String name,double money){
this.id=id;
this.name=name;
this.money=money;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", money=" + money + "]";
}
}
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
public class test {
public static void main(String[] args) {
// TODO Auto-generated method stub
User u1=new User(0001, "張三", 126000);
User u2=new User(0002, "李四", 25000);
User u3=new User(0003, "王五", 150200);
HashMap<Integer,User> h=new HashMap<>();
h.put(1, u1);
h.put(2, u2);
h.put(3, u3);
Set s=h.keySet();
Iterator i=s.iterator();
while(i.hasNext()){
Object key=i.next();
System.out.println("key值:"+key+",value值："+h.get(key));
}
}
}
