Java—覆写toString方法，覆写equals方法

要求:
1).Person类有name,age,salary属性，要求实现至少两个构造方法，并且属性私有，
提供对应的getter、setter。
2).覆写toString方法，要求在System.out.println()函数中传递Person对象
能打印出三个属性值而不是对象地址。
3).覆写equals方法，要求两个Person类对象的值相同时返回true。

class Person{
    private String name;
    private int age;
    private double salary;

    public Person(String name,int age,double salary){
        this.name = name;
        this.age = age;
        this.salary = salary;
    }
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    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 double getSalary() {
        return salary;
    }

    public void setSalary(double salary) {
        this.salary = salary;
    }

    @Override
    public String toString() {
        return "姓名："+this.name+"年龄："+this.age+"工资："+this.salary;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof Person)) {
            return false;
        }
        Person person = (Person) obj;
        return this.name.equals(person.name) && this.age == person.age && this.salary == person.salary;
    }
}
public class Test{
    public static void main(String[] args) {
        Person per1 = new Person("张三",20,10000);
        Person per2 = new Person("张三",30,10000);
        System.out.println(per1);
        System.out.println(per2);
        System.out.println(per1.equals(per2));
    }
}