public class ToStringDemo {
 String name;
 int age;
 public ToStringDemo(String name,int age){
  this.name = name;
  this.age = age;
 }
 public String toString(){
  return "名字是:"+name+","+"年齡是:"+age;
 }
 
 public static void main(String[] args){
  ToStringDemo p = new ToStringDemo("smile",34);
  System.out.println(p);
 }
}