声明一个日期类MyDate，包含如下方法：
* - boolean isLeapYear()：判断是否是闰年
* - String monthName()：根据月份值，返回对应的英语单词
* - int totalDaysOfMonth()：返回这个月的总天数
* - int totalDaysOfYear()：返回这一年的总天数
* - int daysOfTheYear()：返回这一天是当年的第几数
* 在测试类的main方法中，创建MyDate对象，赋值为当天日期值，调用方法
public class MyDate {//判断是否是闰年public boolean isLeapYear(int year) {if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {return true;} else {return false;}}//根据月份值，返回对应的英语单词public String monthName(int month) {switch (month) {case 1:return "January";case 2:return "February";case 3:return "March";case 4:return "April";case 5:return "May";case 6:return "June";case 7:return "July";case 8:return "August";case 9:return "February";case 10:return "October";case 11:return "November";case 12:return "December";default:return "数据错误";}}//返回这个月的总天数public int totalDaysOfMonth(int year, int month) {switch (month) {case 1:case 3:case 5:case 7:case 8:case 10:case 12:return 31;case 4:case 6:case 9:case 11:return 30;case 2:if (isLeapYear(year)) {return 29;} else {return 28;}default:return -1;}}//返回这一年的总天数public int totalDaysOfYear(int year) {if (isLeapYear(year)) {return 366;} else {return 365;}}//返回这一天是当年的第几天数public int daysOfTheYear(int year, int month, int date) {int total = 0;for (int i = 1; i <= month; i++) {total += totalDaysOfMonth(year, month);}return total += date;}
}
public class MyDateTest {public static void main(String[] args) {MyDate myDate = new MyDate();System.out.println("请输入年份：");Scanner scan1 = new Scanner(System.in);int year = scan1.nextInt();System.out.println("请输入月份：");Scanner scan2 = new Scanner(System.in);int month = scan2.nextInt();System.out.println("请输入日期：");Scanner scan3 = new Scanner(System.in);int date = scan2.nextInt();// System.out.println(year);
// System.out.println(month);
// System.out.println(date);System.out.println("今年是否是闰年："+myDate.isLeapYear(year));System.out.println("这个月对应的英文单词是："+myDate.monthName(month));System.out.println("这个月总共"+myDate.totalDaysOfMonth(year, month)+"天");System.out.println("今年的总天数是"+myDate.totalDaysOfYear(year)+"天");System.out.println("今天是今年的第"+myDate.daysOfTheYear(year, month, date)+"天");}
}
)
