用java寫一個萬年曆

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import java.util.Scanner;public class rili {    static boolean mark=true;    public static void main(String[] args){        Scanner in=new Scanner(System.in);        Scanner in1=new Scanner(System.in);        while(rili.mark){        System.out.println("請輸入年份");        int year=in.nextInt();        System.out.println("請輸入月份");        int month=in.nextInt();        int sum=0;        int c;        for(int i=1990;i<year;i++){            if(i%4==0&&i%100!=0||i%400==0){                sum+=366;            }else {                sum+=365;        }        }        for(int i=1;i<month;i++){            if(i==2){                if(year%4==0&&year%100!=0||year%400==0){                    sum+=29;                }else{                    sum+=28;                }            }else{                if(i==4||i==6||i==9||i==11){                sum+=30;                    }else{                    sum+=31;                }            }        }        sum+=1;        int weekday=sum%7;        System.out.println("日\t一\t二\t三\t四\t五\t六");        for(int i=1;i<=weekday;i++){            System.out.print("\t");}        if(month==2){                if(year%4==0&&year%100!=0||year%400==0){c=29;}                else{c=28;}}                else{if(month==4||month==6||month==9||month==11){c=30;}                    else{c=31;}}            for(int i = 1;i<=c;i++){                if(sum%7==6){                    System.out.print(i+"\n");}                else{                    System.out.print(i+"\t");}                 sum++;  }        System.out.println("\n");        System.out.println("如果想繼續請按1，退出按2");        int flag=in1.nextInt();        if(flag==2)            mark=false;}}   }

用java寫一個萬年曆