Java输出日历

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public class Calendar{public static void main(String[] args) { */        for (int g = 0; g < 100; g++) {            Scanner in = new Scanner(System.in);            System.out.println("\n请输入年份：");            int year = in.nextInt();            System.out.println("请输入月份：");            int month = in.nextInt();            int sum = 0;            int k = 0;            for (int i = 1; i <= month - 1; i++) {                if (i == 2) {                    if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {                        sum = sum + 29;                    } else {                        sum = sum + 28;                    }                } else {                    if (i == 4 || i == 6 || i == 9 || i == 11) {                        sum = sum + 30;                    } else {                        sum = sum + 31;                    }                }            }            for (int a = 1900; a <= year - 1; a++) {                if (a % 4 == 0 && a % 100 != 0 || a % 400 == 0) {                    sum = sum + 366;                } else {                    sum += 365;                }            }            sum += 1;            int wekday = sum % 7;            System.out.println("日\t一\t二\t三\t四\t五\t六");            for (int j = 1; j <= wekday; j++) {                System.out.print("\t");            }            if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {                if (month == 2) {                    k = 29;                } else if (month == 4 || month == 6 || month == 9 || month == 11) {                    k = 30;                } else {                    k = 31;                }            } else {                if (month == 2) {                    k = 28;                } else if (month == 4 || month == 6 || month == 9 || month == 11) {                    k = 30;                } else {                    k = 31;                }            }            for (int i = 1; i <= k; i++) {                if (sum % 7 == 6) {                    System.out.print(i + "\n");                } else {                    System.out.print(i + "\t");                }                sum++;            }        }    }}
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