java - Get/Set 方法错误输出

Question

正在开发一个小型应用程序，允许 DVD 和主角对象从两个不同的类显示，但我得到以下输出。

person.Person@10ed7f5c

任何人都可以深入了解我出了什么问题吗？

DVD类

public class DVD {

private String title;
private Person leadActor;
private int noOfStars;


public DVD (String a,Person person, int b) {

title = a;
leadActor = person;
noOfStars = b;   

}    

public String getTitle(){

return title;

}

public void setTitle(String title){

this.title = title;    
}

public Person getLeadActor(){

return leadActor;
}

public void setLeadActor(Person leadActor){

this.leadActor = leadActor;
}

public int getNoOfStars(){

return noOfStars;
}

public void setNoOfStarts(int noOfStars){

this.noOfStars = noOfStars;

}

@Override
public String toString() {

String s = "Title " + title + "/r" + "Actor:" + leadActor + "/r" + noOfStars;

return s;
}

}

人员类别

public class Person {

private String firstName;
private String lastName;    


public Person (String a, String b){

firstName = a;
lastName = b;


}

public String getfirstName(){


    return firstName;
}

public void setfirstName(String firstName){


   this.firstName = firstName;
}

public String getlastName(){


    return lastName;
}

public void setlastName(String lastName){

this.lastName = lastName;
}
}

我的类创建对象并调用 toString

public class DvdTest {


private DVD d1;

public static void main (String [] args){

Person p2 = new Person ("Leonardo", "Decaprio");

DVD d1 = new DVD ("Inception",p2,4); 

System.out.println (p2.toString());

}
}

Answer 1

就像 DVD 类一样，您也需要重写 Person 类中的 toString() 方法。目前它正在打印从toString()的默认实现返回的值。 ，就像这样

getClass().getName() + '@' + Integer.toHexString(hashCode())

下面是您可以使用的 IDE 生成实现示例。

@Override
public String toString() {
    return "Person [firstName=" + firstName + ", lastName=" + lastName + "]";
}