
class ViewMonth {
int month;
int year;
ViewMonth(final int displayMonth, final int displayYear) {
month = displayMonth;
year = displayYear;
}
private String checkMonth() {
String[] months = { "1 月", "2 月", "3 月", "4 月", "5 月", "6 月", "7 月",
"8 月", "9 月", "10 月", "11 月", "12 月" };
return months[month];
}
private int checkDays() {
int[] numofDays = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
return numofDays[month];
}
/
使用此方法打印该月的日历
/
void printMonth() {
/ 将该月份起始处的天数留空 /
int initialSpaces = 0;
try {
/ 获取月份名称 /
String monthName = checkMonth();
Systemoutprintln();
Systemoutprintln("\t\t\t " + year + " 年 " + monthName);
Systemoutprintln();
} catch (ArrayIndexOutOfBoundsException ae) {
Systemoutprintln("超出范围 ");
Systemexit(0);
}
GregorianCalendar cal = new GregorianCalendar(year, month, 1);
Systemoutprintln("\t日\t一\t二\t三\t四\t五\t六");
initialSpaces = calget(CalendarDAY_OF_WEEK) - 1;
/ 获取天数 /
int daysInMonth = checkDays();
/ 检查是否为闰年并为二月增加一天 /
if (calisLeapYear(calget(CalendarYEAR)) && month == 1) {
++daysInMonth;
}
for (int ctr = 0; ctr < initialSpaces; ctr++) {
Systemoutprint("\t");
}
for (int ctr = 1; ctr <= daysInMonth; ctr++) {
/ 为单个日期添加空格 /
if (ctr <= 9) {
Systemoutprint(" ");
}
Systemoutprint("\t" + ctr);
/ 检查行的末尾 /
if ((initialSpaces + ctr) % 7 == 0) {
Systemoutprintln();
} else {
Systemoutprint(" ");
}
}
Systemoutprintln();
}
}
class J7上机2 {
protected J7上机2() {
}
public static void main(String[] args) {
int month, year;
if (argslength == 2) {
Systemoutprintln("显示日历");
Systemoutprintln();
int mon = IntegerparseInt(args[0]);
month = mon - 1;
year = IntegerparseInt(args[1]);
} else {
Calendar today = CalendargetInstance();
month = todayget(CalendarMONTH);
year = todayget(CalendarYEAR);
}
ViewMonth mv = new ViewMonth(month, year);
mvprintMonth();
}
}花了半个小时写了一个望采纳给好评。
import javautilScanner;
public class PrintCalendar {
/ Main method /
public static void main(String[] args) {
Scanner input = new Scanner(Systemin);
// Prompt the user to enter year
Systemoutprint("Enter full year (eg, 2001): ");
int year = inputnextInt();
// Prompt the user to enter month
Systemoutprint("Enter month in number between 1 and 12: ");
int month = inputnextInt();
// Print calendar for the month of the year
printMonth(year, month);
}
/ Print the calendar for a month in a year /
public static void printMonth(int year, int month) {
// Print the headings of the calendar
printMonthTitle(year, month);
// Print the body of the calendar
printMonthBody(year, month);
}
/ Print the month title, eg, May, 1999 /
public static void printMonthTitle(int year, int month) {
Systemoutprintln(" " + getMonthName(month)
+ " " + year);
Systemoutprintln("-----------------------------");
Systemoutprintln(" Sun Mon Tue Wed Thu Fri Sat");
}
/ Get the English name for the month /
public static String getMonthName(int month) {
String monthName = "";
switch (month) {
case 1: monthName = "January"; break;
case 2: monthName = "February"; break;
case 3: monthName = "March"; break;
case 4: monthName = "April"; break;
case 5: monthName = "May"; break;
case 6: monthName = "June"; break;
case 7: monthName = "July"; break;
case 8: monthName = "August"; break;
case 9: monthName = "September"; break;
case 10: monthName = "October"; break;
case 11: monthName = "November"; break;
case 12: monthName = "December";
}
return monthName;
}
/ Print month body /
public static void printMonthBody(int year, int month) {
// Get start day of the week for the first date in the month
int startDay = getStartDay(year, month);
// Get number of days in the month
int numberOfDaysInMonth = getNumberOfDaysInMonth(year, month);
// Pad space before the first day of the month
int i = 0;
for (i = 0; i < startDay; i++)
Systemoutprint(" ");
for (i = 1; i <= numberOfDaysInMonth; i++) {
Systemoutprintf("%4d", i);
if ((i + startDay) % 7 == 0)
Systemoutprintln();
}
Systemoutprintln();
}
/ Get the start day of month/1/year /
public static int getStartDay(int year, int month) {
final int START_DAY_FOR_JAN_1_1800 = 3;
// Get total number of days from 1/1/1800 to month/1/year
int totalNumberOfDays = getTotalNumberOfDays(year, month);
// Return the start day for month/1/year
return (totalNumberOfDays + START_DAY_FOR_JAN_1_1800) % 7;
}
/ Get the total number of days since January 1, 1800 /
public static int getTotalNumberOfDays(int year, int month) {
int total = 0;
// Get the total days from 1800 to 1/1/year
for (int i = 1800; i < year; i++)
if (isLeapYear(i))
total = total + 366;
else
total = total + 365;
// Add days from Jan to the month prior to the calendar month
for (int i = 1; i < month; i++)
total = total + getNumberOfDaysInMonth(year, i);
return total;
}
/ Get the number of days in a month /
public static int getNumberOfDaysInMonth(int year, int month) {
if (month == 1 || month == 3 || month == 5 || month == 7 ||
month == 8 || month == 10 || month == 12)
return 31;
if (month == 4 || month == 6 || month == 9 || month == 11)
return 30;
if (month == 2) return isLeapYear(year) 29 : 28;
return 0; // If month is incorrect
}
/ Determine if it is a leap year /
public static boolean isLeapYear(int year) {
return year % 400 == 0 || (year % 4 == 0 && year % 100 != 0);
}
}
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