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  • Java程序设计之算出一年第多少天

      可以直接拷贝运行。

    package year;
    
    import java.util.Scanner;
    
    public class year {
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            year y = new year();
            y.fun();
        }
        
        public void fun(){
            String str = shuru();
            int year = Integer.parseInt(str.split(" ")[0]);
            int month = Integer.parseInt(str.split(" ")[1]);
            int day = Integer.parseInt(str.split(" ")[2]);
            jisuan(year,month,day);
        }
        
        private String shuru(){
            System.out.print("输入年月日中间以空格间隔:");
            Scanner s = new Scanner(System.in);
            return s.nextLine();
        }
        
        private void jisuan(int year, int month,int day){
            int i = 0;
            int j = 0;
            //是闰年
            if(year%400 == 0||year%4==0&&year%100!=0){
                switch(month){
                case 12: i+=31;
                case 11: i+=30;
                case 10: i+=31;
                case 9: i+=30;
                case 8: i+=31;
                case 7: i+=31;
                case 6: i+=30;
                case 5: i+=31;
                case 4: i+=30;
                case 3: i+=31;
                case 2: i+=28;
                case 1: i+=31;
                }
                if(month == 1||month == 3||month == 5||month == 7||month == 8||month == 10||month == 12){
                    j = 31 - day;
                    System.out.println(i-j);
                }else if(month == 2){
                    j = 28 - day;
                    System.out.println(i-j);
                }else{
                    j = 30 - day;
                    System.out.println(i - j);
                }
            }else{
                switch(month){
                case 12: i+=31;
                case 11: i+=30;
                case 10: i+=31;
                case 9: i+=30;
                case 8: i+=31;
                case 7: i+=31;
                case 6: i+=30;
                case 5: i+=31;
                case 4: i+=30;
                case 3: i+=31;
                case 2: i+=29;
                case 1: i+=31;
                }
                if(month == 1||month == 3||month == 5||month == 7||month == 8||month == 10||month == 12){
                    j = 31 - day;
                    System.out.println(i-j);
                }else if(month == 2){
                    j = 28 - day;
                    System.out.println(i-j);
                }else{
                    j = 30 - day;
                    System.out.println(i - j);
                }
            }
        }
    }

      比如输入:1994 3 28

      输出:88

      1994年的第88天。

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  • 原文地址:https://www.cnblogs.com/xiangxi/p/4708593.html
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