如何用java语言 写出一个万年历呢？ 要求自己输入年份 自动出现月 日 以及对应的星期

如果要月历，只要把月份循环那里修改链穗御下，直接调用月历方法既可import java.text.DateFormatSymbols;import java.util.Calendar;import javax.swing.JOptionPane;public class YearCalendar { public static void main(String[] args) { final String title = getCalTitle(); String input = JOptionPane.showInputDialog("Please input year"); try{ if(!input.trim().matches("^\\d{4}$")){ throw new NumberFormatException(); } int year = Integer.parseInt(input.trim()); System.out.println("------- Calendar For Year " + year + " ----------------"); String[] monthTitles = new DateFormatSymbols().getMonths(); for(int month = Calendar.JANUARY; month <= Calendar.DECEMBER; month++){ System.out.println("\t********** "族祥 + monthTitles[month] + " *********"棚岩); System.out.println(title); generateMonthlyCalendar(year, month); System.out.println("\n\n"); }}catch(NumberFormatException nbFmtExp){ JOptionPane.showMessageDialog(null, "Error data foramt! Date should be 4 digits only format yyyy"); System.exit(0); }} private static String getCalTitle() { StringBuffer sb = new StringBuffer(); String[] ary = new DateFormatSymbols().getShortWeekdays(); for(int i = Calendar.SUNDAY; i <= Calendar.SATURDAY; i++){ sb.append(ary[i]+ "\t"); } return sb.toString(); } private static void generateMonthlyCalendar(int year, int month) { Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, year); cal.set(Calendar.MONTH, month); cal.set(Calendar.DATE, 1); int maxDay = cal.getActualMaximum(Calendar.DAY_OF_MONTH); int i = 0; for(i = Calendar.SUNDAY; i < cal.get(Calendar.DAY_OF_WEEK); i++){ System.out.print(" \t"); } while(cal.get(Calendar.DAY_OF_WEEK) != Calendar.SUNDAY){ System.out.print(cal.get(Calendar.DATE) + "\t"); cal.add(Calendar.DATE, 1); } int weekDay = Calendar.SATURDAY; int day = cal.get(Calendar.DATE); while(day <= maxDay){ if(weekDay == Calendar.SATURDAY){ System.out.println(); weekDay = Calendar.SUNDAY; }else{ weekDay++; } System.out.print(day++ + "\t");} }}--------------------------------JDK 1.5结果------- Calendar For Year 2011 ---------------- ********** January *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 ********** February *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 ********** March *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 ********** April *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ********** May *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 ********** June *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ********** July *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 ********** August *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 ********** September *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ********** October *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 ********** November *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ********** December *********Sun Mon Tue Wed Thu Fri Sat 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31