package?calendar1;
/*通過用戶的輸入某年某月是以星期幾開頭
?*?輸出當年每一個月的日歷*/
import?java.util.Scanner;

public?class?Calendar?{
	public?static??void?main（String[]?args）{
		Scanner?input?=?new?Scanner（System.in）;
		
		System.out.println（“Enter?year“）;
		int?year?=?input.nextInt（）;
		
		System.out.println（“Enter?month?between?1?and?12“）;
		int?month?=?input.nextInt（）;
		while（?month???12）
			System.out.println（“illegal?month?please?enter?again“）;
		
		System.out.println（“Enter?the?first?day?index?1~7“）;
		int?day?=?input.nextInt（）;
		
		makeMonth（yearmonthday）;
	}
	
	//建立這年的日歷
	public?static?void?makeMonth（int?yearint?monthint?day）{
		int?StartDay?=?getStartDay（yearmonthday）;
		for（int?i?=?1;?i?<=?12;?i++）
		StartDay?=?printMonth（StartDayyeari）;
	}
	
	//輸出當月日歷
	public?static?int?printMonth（int?StartDayint?yearint?month）{
		printtitle（yearmonth）;
		return?printMonthBody（StartDayyearmonth）;
	}
	
	//輸出日歷開頭
	public?static?void?printtitle（int?yearint?month）{
		System.out.println（“?????????“?+?getMonthName（month）
				+?“?“?+?year）;
		System.out.println（“-----------------------------“）;
		System.out.println（“?Sun?Mon?Tue?Wed?Thu?Fri?Sat“）;
	}
	
	
	//輸出月份體
	public?static?int?printMonthBody（int?startDayint?yearint?month）{
		int?NumberOfDaysInMonth?=?getNumberOfDaysInMonth（yearmonth）;
		
		int?i?=?0;?
		for（;i?			System.out.print（“????“）;
		for（i?=?1;i?<=?NumberOfDaysInMonth;i++）{
			System.out.printf（“%4d“i）;
			
			if（（i?+?startDay）?%?7?==?0）
				System.out.println（）;
		}
		System.out.println（）;
		return?（startDay?+?NumberOfDaysInMonth）?%?7;//計算下一個月的開始天數
		
	}
	
	//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;
	}
	
	//得到當前月的天書
	public?static?int?getNumberOfDaysInMonth（int?yearint?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;
	}
	
	?//判斷是否是閏年
	public?static?boolean?isLeapYear（int?year）{
		return?year?%?400?==?0?||?（year?%?4?==?0?&&?year?%?100?!=?0）;
	}
	
	//的到當年第一天的位置
	public?static?int?getStartDay（int?yearint?monthint?day）{
		int?frontDays?=?0;
		for（int?i?=?0?;?i?			frontDays?+=?getNumberOfDaysInMonth（yeari）;
		}
		re