.equals（）方法，比较一个类的两个对象没有给出确切的结果[重复]

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How to override equals method in Java 9 answers

如何在Java 9答案中覆盖equals方法

I have a class named student contains two variables name,no and i have created two objects for the class, now i want to check whether both objects are same or not. I am using .equals() method but i am not getting proper output.

我有一个名为student的类包含两个变量name,no和我为该类创建了两个对象,现在我想检查两个对象是否相同。我正在使用.equals()方法,但我没有得到正确的输出。

public class Student {
    String name;
    int no;

    Student(String name,int no){
        this.name=name;
        this.no=no;
    }

    public static void main(String[] args) {
        Student s1 = new Student("abc", 10);
        Student s2 = new Student("abc", 10);
        System.out.println(s1.equals(s2));
    }
}

output: false

1 个解决方案

#1

You haven't provided an implementation of equals, meaning it will use the default one it inherits from Object, which is the same as: s1 == s2, which returns false because they are not the same object.

你还没有提供equals的实现,这意味着它将使用它从Object继承的默认实现,它与:s1 == s2相同,它返回false,因为它们不是同一个对象。

You'll need to provide your own implementation.

您需要提供自己的实现。

Take a look at this.

看看这个。

#1