Java编写的日历,输入年月,输出这个月的日期与星期

import java.util.Scanner;

public class rili {

    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++;
}
}
}
}

Java编写的日历,输入年月,输出这个月的日期与星期

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