public static void main(String[] args) { Scanner in = new Scanner(System.in); while (in.hasNextInt()){ int y = in.nextInt(), m = in.nextInt(); if (m == 2){ if ((y % 4 == 0 && y % 100 != 0) || (y % 400 == 0)){ System.out.println("29"); } else { System.out.println("28"); } } if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12){ System.out.println("31"); } else if (m == 4 || m == 6 || m == 9 || m == 11) { System.out.println("30"); } } }
import java.util.Scanner; import java.util.Arrays; import java.util.List; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); while (in.hasNextInt()) { // 注意 while 处理多个 case int year = in.nextInt(); String month = in.next(); String[] big = new String[] {"1", "3", "5", "7", "8", "10", "12"}; List<String> bigList = Arrays.asList(big); // 2月 if ("2".equals(month)) { //闰年 if ( (year % 4 == 0 && year % 100 != 0) || year % 400 == 0 ) { System.out.println(29); } else { System.out.println(28); } //大月 } else if (bigList.contains(month)) { System.out.println(31); } else { System.out.println(30); } } } }我好蠢na
import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); // 注意 hasNext 和 hasNextLine 的区别 while (in.hasNextInt()) { // 注意 while 处理多个 case int year = in.nextInt(); int month = in.nextInt(); // 判断是否闰年 boolean isRunNian = (year % 4 == 0 && year % 100 != 0) || year % 400 == 0; switch(month){ case 1: case 3: case 5: case 7: case 8: case 10: case 12: System.out.println(31); break; case 4: case 6: case 9: case 11: System.out.println(30); break; case 2: System.out.println(isRunNian ? 29: 28); } } } }
import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); // 注意 hasNext 和 hasNextLine 的区别 while (in.hasNextInt()) { // 注意 while 处理多个 case int year = in.nextInt(); int month = in.nextInt(); // 31天月份的正则表达式 String day31 = "[13578]|10$|12$"; // 30天月份的正则表达式 String day30 = "[469]|11$"; String strMonth = String.valueOf(month); if(month == 2){ if(year % 4 == 0 && year % 100 != 0 || year % 400 == 0){ System.out.println(29); }else{ System.out.println(28); } }else { if(strMonth.matches(day31)){ System.out.println(31); } if(strMonth.matches(day30)){ System.out.println(30); } } } } }
import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); // 注意 hasNext 和 hasNextLine 的区别 while (in.hasNextInt()) { // 注意 while 处理多个 case int y = in.nextInt(); int m = in.nextInt(); if(y%4==0&&y%100!=0){ if(m==2){ System.out.println(29); } }else if(y%400==0){ if(m==2){ System.out.println(29); } }else if(m==2){ System.out.println(28); } if(m==1||m==3||m==5||m==7||m==8||m==10||m==12){ System.out.println(31); }else if(m==4||m==6||m==9||m==11){ System.out.println(30); } } } }
import java.util.*; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); while(scanner.hasNext()){ int year = scanner.nextInt(); int month = scanner.nextInt(); if(month == 1 | month == 3 | month == 5 | month == 7 | month == 8 | month == 10 | month == 12){ System.out.println("31"); }else if(month == 4 | month == 6 | month == 9 | month == 11){ System.out.println("30"); }else if(month == 2){ if((year % 4 == 0 && year % 100 != 0 ) || year % 400 == 0){ System.out.println("29"); }else{ System.out.println("28"); } } } } }
import java.util.*; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); while (sc.hasNext()) { int n = sc.nextInt(); int y = sc.nextInt(); int run = 0; if (y == 1 || y == 3 || y == 5 || y == 7 || y == 8 || y == 10 || y == 12) { System.out.println("31"); } else { if (y == 2) { if (n % 4 == 0 && n % 100 != 0) { System.out.println("29"); } else if (n % 1000 == 0) { System.out.println("29"); } else { System.out.println("28"); } } else { System.out.println("30"); } } } } }
import java.util.*; public class Main{ public static int getday(int y,int m){ int day=0; if(m==1|m==3|m==5|m==7|m==8|m==10|m==12){ return day=31; } else if(m==4|m==6|m==9|m==11){ return day=30; } else if(m==2){ if(y%4==0&&y%100!=0|y%400==0){ return day=29; } else return day=28; } return day; } public static void main(String args[]){ Scanner input=new Scanner(System.in); while(input.hasNext()){ int year=input.nextInt(); int mon=input.nextInt(); System.out.println(getday(year,mon)); } } }
import java.util.Arrays; import java.util.Calendar; import java.util.List; import java.util.Scanner; import java.util.stream.Collectors; /** * @Title: 获得月份天数 * @Remark: KiKi想获得某年某月有多少天,请帮他编程实现。输入年份和月份,计算这一年这个月有多少天。 * @Author: ijunfu * @Version: 1.0.0 * @Date: 2022-03-19 */ public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); while(in.hasNextLine()) { List<Integer> list = Arrays.stream(in.nextLine().split(" ")).map(x -> Integer.valueOf(x)).collect(Collectors.toList()); int year = list.get(0); int month = list.get(1)-1; Calendar calendar = Calendar.getInstance(); calendar.set(Calendar.YEAR, year); calendar.set(Calendar.MONTH, month); int day = calendar.getActualMaximum(Calendar.DAY_OF_MONTH); System.out.println(day); } } }
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scan = new Scanner(System.in); while (scan.hasNextInt()) { int year = scan.nextInt(); int month = scan.nextInt(); //判断月份 switch (month) { case 1: case 3: case 5: case 7: case 8: case 10: case 12: System.out.println("31"); break; case 2: if (isLeapYear(year)) { System.out.println("29"); } else { System.out.println("28"); } break; default: System.out.println("30"); break; } } } public static boolean isLeapYear(int year) { if((year % 100 != 0 && year % 4 == 0)||(year %400 == 0)) { return true; } else { return false; } } }
import java.util.Scanner; import java.util.Arrays; public class Main{ public static void main(String[] args){ Scanner sc=new Scanner(System.in); while(sc.hasNext()){ int year=sc.nextInt(); int month=sc.nextInt(); boolean flg=(year%4==0 && year%100!=0) || (year%400==0); String[] str1=new String[]{"1","3","5","7","8","10","12"}; String[] str2=new String[]{"4","6","9","11"}; if(flg && month==2){ System.out.println(29); }else if(flg && Arrays.asList(str1).contains(month+"")){ System.out.println(31); }else if(flg && Arrays.asList(str2).contains(month+"")){ System.out.println(30); }else if(!flg && month==2){ System.out.println(28); }else if(!flg && Arrays.asList(str1).contains(month+"")){ System.out.println(31); }else if(!flg && Arrays.asList(str2).contains(month+"")){ System.out.println(30); } } } }
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); while (sc.hasNext()) { Integer year = sc.nextInt(); Integer month = sc.nextInt(); switch (month) { case 1: case 3: case 5: case 7: case 8: case 10: case 12: System.out.println("31"); break; case 4: case 6: case 9: case 11: System.out.println("30"); break; case 2: if(year%4==0){ System.out.println("29");} else {System.out.println("28");} break; } } } }不要忘记break;就行
import java.util.Scanner; public class Main{ public static void main(String[] args){ Scanner sc = new Scanner(System.in); while (sc.hasNext()) { int year = sc.nextInt(); int month = sc.nextInt(); switch (month){ case 2: if ((year%100==0 && year%400!=0) || year%4!=0){ System.out.println(28); }else { System.out.println(29); }; break; case 4:System.out.println(30);break; case 6:System.out.println(30);break; case 9:System.out.println(30);break; case 11:System.out.println(30);break; default: System.out.println(31); } } } }