第3章：给出一个月的总天数

/** * 给出一个月的总天数。 * 提示用户输入月份和年份： * 显示这个月的天数。 */package Test;import java.util.Scanner;public class T311Scanner {public static void main(String[] args) {Scanner input = new Scanner(System.in);System.out.print("Enter the month and year: ");int months = input.nextInt();int year = input.nextInt();int day = 0;boolean isLeapYear = (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);//System.out.println((isLeapYear == true) ? day == 29 :day == 28);if (isLeapYear == true)day = 29;elseday = 28;if (months == 1 || months == 3 || months == 5 || months == 7|| months == 8 || months == 10 || months == 12)System.out.println("Jan. " + year + " has 31 days!");elseSystem.out.println((months == 2) ? "Feb. " + year + " has " + day + " days!" : "Jan. " + year + " has 30 days!");/** * System.out.println((months == 4 || months == 6 || months == 9 || months == 11) *  ? "Jan. " + year + " has 30 days!" : "Feb. " + year + " has " + day + " days!"); *      * else if (months == 4 || months == 6 || months == 9 || months == 11) * System.out.println("Jan. " + year + " has 30 days!"); * else * System.out.println("Feb. " + year + " has " + day + " days!"); *  * switch(months){ * case 1: System.out.println("Jan. " + year + " has 31 days!"); *         break; * case 2: System.out.println("Feb. " + year + " has " + day + " days!"); *                break; * case 3: System.out.println("Mar. " + year + " has 31 days!"); *                 break; * case 4: System.out.println("Apr. " + year + " has 30 days!"); *                 break; * case 5: System.out.println("May. " + year + " has 31 days!"); *                break; * case 6: System.out.println("Jun. " + year + " has 30 days!"); *                 break; * case 7: System.out.println("Jul. " + year + " has 31 days!"); *                 break; * case 8: System.out.println("Aug. " + year + " has 31 days!"); *                 break; * case 9: System.out.println("Sep. " + year + " has 30 days!"); *                break; * case 10: System.out.println("Oct. " + year + " has 31 days!"); *                  break; * case 11: System.out.println("Nov. " + year + " has 30 days!"); *                 break; * case 12: System.out.println("Dec. " + year + " has 31 days!"); *                 break; * } */}}