重写Object类的equals方法

最新推荐文章于 2025-12-21 20:07:43 发布

原创最新推荐文章于 2025-12-21 20:07:43 发布 · 460 阅读

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#java #开发语言

该篇文章展示了如何在Java中定义和使用一个名为Doctor的类，重点讲解了equals方法的重写，用于比较两个Doctor对象是否相等。

package com.lmdedu.homework;

public class Homework10 {
    public static void main(String[] args) {
        Doctor doctor = new Doctor("lmd", 20, "医生", '男', 50000);
        Doctor doctor1 = new Doctor("lmd", 20, "医生", '男', 50000);
        System.out.println(doctor.equals(doctor1));

    }
}

class Doctor{
    private String name;
    private int age;
    private String job;
    private char gender;
    private double sal;

    public Doctor(String name, int age, String job, char gender, double sal) {
        this.name = name;
        this.age = age;
        this.job = job;
        this.gender = gender;
        this.sal = sal;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getJob() {
        return job;
    }

    public void setJob(String job) {
        this.job = job;
    }

    public char getGender() {
        return gender;
    }

    public void setGender(char gender) {
        this.gender = gender;
    }

    public double getSal() {
        return sal;
    }

    public void setSal(double sal) {
        this.sal = sal;
    }

    @Override
    public boolean equals(Object obj) {
        //判断两个对象是否相同
        if(this == obj){
            return true;
        }
        //判断obj是否时 Doctor类对象或其子类对象
        //过关斩将 校验方式
        if(!(obj instanceof Doctor)) {
            return false;
        }
        //因为obj的运行类型是Doctor或其子类，向下转型，将Obj向下转型为Doctor,
        Doctor doc = (Doctor)obj;
        return this.name.equals(doc.getName()) && this.age == doc.getAge() &&
                this.job.equals(doc.getJob()) && this.gender == doc.getGender()
                && this.sal == doc.getSal();
    }
}