妳好，這是代碼
import?java.util.Calendar;
import?java.util.Scanner;
/**
*?@author?liuxe *?@since?JDK?1.7.0_79 */public?class?CalendarTest?{
public?static?void?main(String[]?args)?{
int?year?=?-1;
int?month?=?-1;
Scanner?scanner?=?new?Scanner(System.in);
System.out.println("請輸入年份");
while?(year?<?0)?{
try?{
year?=?scanner.nextInt();
}?catch?(Exception?ex)?{
year?=?-1;
scanner.nextLine();
System.out.println("輸入錯誤,請輸入年份");
}
}
System.out.println("請輸入月份");
while?(month?<?0)?{
try?{
month?=?scanner.nextInt();
if?(month?<?1?||?month?>?12)?{
throw?new?Exception();
}
}?catch?(Exception?ex)?{
month?=?-1;
scanner.nextLine();
System.out.println("輸入錯誤,請輸入月份");
}
}
System.out.println("\n日\t壹\t二\t三\t四\t五\t六\n");
Calendar?calendar?=?Calendar.getInstance();
calendar.set(year,?month?-?1,?1);
int?week?=?calendar.get(Calendar.DAY_OF_WEEK);
int?weekLoop?=?0;
int?monthDays?=?0;
//switch結構
switch?(month)?{
case?1:
monthDays?=?31;
break;
case?2:
//判斷是不是閏年
if?(((year?%?4?==?0)?&&?(year?%?100?!=?0))?||?(year?%?400?==?0))?{
monthDays?=?29;
}?else?{
monthDays?=?28;
}
break;
case?3:
monthDays?=?31;
break;
case?4:
monthDays?=?30;
break;
case?5:
monthDays?=?31;
break;
case?6:
monthDays?=?30;
break;
case?7:
monthDays?=?31;
break;
case?8:
monthDays?=?31;
break;
case?9:
monthDays?=?30;
break;
case?10:
monthDays?=?31;
break;
case?11:
monthDays?=?30;
break;
default:
monthDays?=?31;
}
//for循環
for?(int?i?=?0?-?week?+?2;?i?<=?monthDays;?i++)?{
if?(i?<=?0)?{
System.out.print("");
}?else?{
System.out.print(i);
}
weekLoop++;
System.out.print("\t");
if?(weekLoop?%?7?==?0)?{
System.out.println();
}
}
System.out.println();
scanner.close();
}
}
運行結果：