java中对象流objectstream问题

输出的为什么不是cyh男20
ym女20
求大神解答！！！！！！！！！！

你的代码和我这个一样吗？麻烦把你的代码粘全了，我看看

这个是照片。。。。。。。。。

我和你写的差不多，不知道你为啥会这样，我给你粘出我的代码
package lianxi;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class TestObjectOutPutString{
public static void main(String[] args) throws IOException{
Person p = new Person("wang", "boy", 20);
Person p1 = new Person("ma", "girl", 21);
try {
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("d:/1.txt"));
out.writeObject(p);
out.writeObject(p1);
out.flush();
out.close();

        ObjectInputStream in = new ObjectInputStream(new FileInputStream("d:/1.txt"));
        while(true){    
            System.out.println(in.readObject());
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

}

}
class Person implements Serializable {
private String name;
private String gender;
private int age;
public Person(String name, String gender, int age) {
super();
this.name = name;
this.gender = gender;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "Person [name=" + name + ", gender=" + gender + ", age=" + age
+ "]";
}

}

结果就是
Person [name=wang, gender=boy, age=20]
Person [name=ma, gender=girl, age=21]