calendar.java

java课程的资料以及实验的代码

import java.util.*;
import java.util.GregorianCalendar;

class Calendar_Printout
{
	public static void main(String args[])
	{	
		Calendar c = Calendar.getInstance();
		Date d=c.getTime();//Mon Mar 10 10:59:41 GMT+08:00 2008
		int year; //current year
		int currentDate;// current date of the month, 1...31
		int i,j;
		String[] Day=new String[]{"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
		for (i=0;i<Day.length;i++) System.out.print(Day[i]+"  ");
		System.out.println();
		int index;
		String dateString=d.toString(); //obtain entire date string
		int yearIndex=dateString.lastIndexOf(" ");
		year=Integer.parseInt(dateString.substring(yearIndex+1));
		index=dateString.indexOf(" ");
		index=dateString.indexOf(" ", index+1);
		currentDate=Integer.parseInt(dateString.substring(index+1, dateString.indexOf(" ", index+1)));
		String currentDay=dateString.substring(0, dateString.indexOf(" "));
		int currentDayIndex=0;
		
		//find out what day is current day
		for (i=0;i<7;i++) if (currentDay.compareTo(Day[i])==0) 
		{
			currentDayIndex=i;
			break;
		};
		
		//begin to print out day from 1 to CurrentDate-1
		int outIndex=0;
		for (i=1;i<currentDate;i++)
		{
			outIndex=currentDayIndex-(currentDate-i)%7;
			if (outIndex<0) outIndex+=7;
			if (i==1) 
			{
				for (j=1;j<=outIndex;j++) System.out.print("     ");
				System.out.print(i);
				if (outIndex==6) System.out.println();
				else System.out.print("    ");
			}
			else
			{
				System.out.print(i);
				if (outIndex==6) System.out.println();
				else
				{
					if (i<=9) System.out.print("    ");
					else System.out.print("   ");
				}
			};
		};
		//begin to print out current day
		if (currentDate==1)
		{
			for (j=1;j<=currentDayIndex;j++) System.out.print("     ");
			System.out.print(1+"*");
			if (currentDayIndex==6) System.out.println();
			else System.out.print("    ");
		}
		else
		{
			System.out.print(i+"*");
			if (outIndex==5) System.out.println();
			else if (i<=9) System.out.print("   ");
			else System.out.print("  ");
			outIndex++;
		};
		
		//begin to print out current day+1 to end
		j=i+1;
		int totalDaysOfMonth=0;
		String month=(d.toString().substring(4, 7));
		if (month.compareTo("Feb")==0) 
		{
			String GMTString=d.toString();
			GregorianCalendar ww=new GregorianCalendar();
			if (ww.isLeapYear(year)) totalDaysOfMonth=29;
			else totalDaysOfMonth=28;
		}
		else
		{
			if (month.compareTo("Jan")==0) totalDaysOfMonth=31;
			if (month.compareTo("Mar")==0) totalDaysOfMonth=31;
			if (month.compareTo("Apr")==0) totalDaysOfMonth=30;
			if (month.compareTo("May")==0) totalDaysOfMonth=31;
			if (month.compareTo("Jun")==0) totalDaysOfMonth=30;
			if (month.compareTo("Jul")==0) totalDaysOfMonth=31;
			if (month.compareTo("Aug")==0) totalDaysOfMonth=31;
			if (month.compareTo("Sep")==0) totalDaysOfMonth=30;
			if (month.compareTo("Oct")==0) totalDaysOfMonth=31;
			if (month.compareTo("Nov")==0) totalDaysOfMonth=30;
			if (month.compareTo("Dec")==0) totalDaysOfMonth=31;
		};
		for (j=i+1;j<=totalDaysOfMonth;j++)
		{
			outIndex=(currentDayIndex+j-currentDate)%7;
			System.out.print(j);
			if (outIndex==6) System.out.println();
			else
			{
				if (j<=9) System.out.print("    ");
				else System.out.print("   ");
			}
		}
	}
}