import java.util.Scanner;
public class MyDate {
private int year;
private int month;
private int day;
public MyDate(int year, int month, int day) {
if (isValidDate(year, month, day)) {
this.year = year;
this.month = month;
this.day = day;
} else {
throw new IllegalArgumentException("Invalid date");
}
}
public int getYear() {
return year;
}
public void setYear(int year) {
if (isValidDate(year, month, day)) {
this.year = year;
} else {
throw new IllegalArgumentException("Invalid year");
}
}
public int getMonth() {
return month;
}
public void setMonth(int month) {
if (isValidDate(year, month, day)) {
this.month = month;
} else {
throw new IllegalArgumentException("Invalid month");
}
}
public int getDay() {
return day;
}
public void setDay(int day) {
if (isValidDate(year, month, day)) {
this.day = day;
} else {
throw new IllegalArgumentException("Invalid day");
}
}
private boolean isValidDate(int year, int month, int day) {
if (year < 1 || month < 1 || month > 12 || day < 1) {
return false;
}
int[] daysInMonth = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
if (isLeapYear(year)) {
daysInMonth[1] = 29;
}
return day <= daysInMonth[month - 1];
}
private boolean isLeapYear(int year) {
return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
}
public boolean isThisYearLeapYear() {
return isLeapYear(year);
}
public String getMonthType() {
int[] bigMonths = {1, 3, 5, 7, 8, 10, 12};
for (int bigMonth : bigMonths) {
if (month == bigMonth) {
return "大月";
}
}
if (month == 2) {
return isThisYearLeapYear() ? "Leap February" : "Common February";
}
return "小月";
}
@Override
public String toString() {
String leapYearInfo = isThisYearLeapYear() ?
" 闰年" : " 不是闰年";
return String.format("%04d/%02d/%02d", year, month, day) + " - " + getMonthType() + " - " + leapYearInfo;
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
try {
System.out.print("请输入年份: ");
int year = scanner.nextInt();
System.out.print("请输入月份: ");
int month = scanner.nextInt();
System.out.print("请输入日期: ");
int day = scanner.nextInt();
MyDate date = new MyDate(year, month, day);
System.out.println(date);
} catch (Exception e) {
System.out.println("输入的日期无效: " + e.getMessage());
} finally {
scanner.close();
}
}
}自定义一个异常类 DateException，继承自 Exception 类，有一个私有的成
员变量 message（异常提示信息，String 类型），完善上述代码中日期类的定义，
设置日期时若用户输入的日期不合法则抛出日期类异常对象，并输出异常信息，
提示用户重新输入，直至用户输入一个合法的日期为止。
博客内容为对读者及其家人送上中国新年假期的美好祝福。
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