java设计一个日期及其测试类把日期类放在MyPackage，测试类和日期类不在同一包中

日期类：

package MyPackage;

public class MyDate {
    private int year;
    private int month;
    private int day;

    public MyDate(int year, int month, int day) {
        this.year = year;
        this.month = month;
        this.day = day;
    }

    public int getYear() {
        return year;
    }

    public int getMonth() {
        return month;
    }

    public int getDay() {
        return day;
    }

    public void setYear(int year) {
        this.year = year;
    }

    public void setMonth(int month) {
        this.month = month;
    }

    public void setDay(int day) {
        this.day = day;
    }

    @Override
    public String toString() {
        return year + "-" + month + "-" + day;
    }
}

测试类：

import MyPackage.MyDate;

public class TestMyDate {
    public static void main(String[] args) {
        MyDate date = new MyDate(2022, 12, 31);
        System.out.println(date);
    }
}