技術標籤：java

計算某年的某個月份有多少天（Java實現）

import java.time.LocalDate;
import java.util.Scanner;

public class Test {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println("請輸入年：");
		int year = sc.nextInt();
		System.out.println("請輸入月：")
 
;
		int month = sc.nextInt();
		int days = 1;//日子預設為1日
		switch (month) {
		case 4, 6, 9, 11:
			days = 30;
			break;
		case 1, 3, 5, 7, 8, 10, 12:
			days = 31;
			break;
		case 2:
			LocalDate now = LocalDate.of(year, month, days);
			days = now.isLeapYear() ? 29 : 28;
			break;
		}
		System.out.printf
 
("%d年%d月有%d天", year, month, days);
	}

}

實現效果如下（控制檯輸出結果）：