小程序--打印日曆

import java.util.*;

public class CalendarTest
{
 public static void main(String[] args)
 {
  GregorianCalendar d = new GregorianCalendar();
  
  int today = d.get(Calendar.DAY_OF_MONTH);
  int month = d.get(Calendar.MONTH);
  
  d.set(Calendar.DAY_OF_MONTH,1);
  int weekday = d.get(Calendar.DAY_OF_WEEK);
  
  System.out.println("Sun Mon Tue Wen Thu Fri Sat");
  
  for(int i=Calendar.SUNDAY;i<weekday;i++)
    System.out.print("  ");
   
  do
  {
   int day = d.get(Calendar.DAY_OF_MONTH);
   if(day<10)System.out.print(" ");
   System.out.print(day);
   
   if(day == today)
      System.out.print("* ");
   else
      System.out.print("  ");
   
   if(weekday == Calendar.SATURDAY)
      System.out.println();
   
   d.add(Calendar.DAY_OF_MONTH,1);
   weekday = d.get(Calendar.DAY_OF_WEEK);     
  } 
  while(d.get(Calendar.MONTH) == month);
  
  if(weekday != Calendar.SUNDAY)
     System.out.println();
 }
}