util包中Calendar使用

来源：互联网发布：字数统计软件编辑：程序博客网时间：2024/05/16 11:06

/**
* Calendar.java
* writeby jsp update2006-11-2
* util class study
*
*/
import java.util.*;

class MonthErro extends Exception
{
    MonthErro()
    {
        super("月份越界");
    }
}

class YaerErro extends Exception
{
    YaerErro()
    {
        super("年份越界");
    }
}

class CalendarTest
{
     //判断是否是闰年
    public static boolean loop(int year)
    {
          if(((year % 4 ==0)&&(year % 100 !=0)) || (year % 400 ==0))
          {
               return true;
          }
          else
          {
               return false;
          }
    }
   //确定每月的天数
    public static int count(int month,int year)
    {
         if(month == 2)
         {
             if(loop(year))
             {
                   return 29;
             }
             else
             {
                   return 28;
             }
         }
         else if((month == 1) || (month == 3) || (month == 5) || (month == 7) || (month == 8) || (month == 10) || (month == 12))
         {
              return 31;
         }
         else
         {
              return 30;
         }
     }

public static void dis(int days,int week)
{

       System.out.println("/t日/t一/t二/t三/t四/t五/t六");
       System.out.print("/t");
       for(int i = 0; i < week; i++)
       {
         System.out.print("/t");
       }

       int week1 = week;

       for(int j = 1; j <= days ; j++)
       {

          if(week1 == 7)
          {
            System.out.println();
            System.out.print("/t");
            week1 = 0;
          }
          System.out.print(j+"/t");
          week1++;
         }
    }
    public static void main(String[] args)
    {
       try{
       if(args.length!= 2)
       {
           Calendar today = Calendar.getInstance();
           int month = today.get(Calendar.MONTH)+1;
           int year = today.get(Calendar.YEAR);
           GregorianCalendar todayWeek = new GregorianCalendar(year,month-1,1);
           int week = todayWeek.get(Calendar.DAY_OF_WEEK)-1;
           int days = count(month,year);

           System.out.println("/t"+year+"-"+month);
           dis (days,week);
       }
       else
       {
         int month = Integer.parseInt(args[0]);
         if((month > 12) || (month < 1))
         {
              throw new MonthErro();
         }
         int year = Integer.parseInt(args[1]);
         if(year < 0)
         {
              throw new YaerErro();
         }
         GregorianCalendar today = new GregorianCalendar(year,month-1,1);
         int week = today.get(Calendar.DAY_OF_WEEK)-1;
         int days = count(month,year);
         System.out.println("/t"+year+"-"+(month));
         dis (days,week);

       }
       }catch ( MonthErro me)
       {
           System.out.println("Exception in CalendarTest in main:"+me.toString());
           me.printStackTrace();
       }catch ( YaerErro ye)
       {
           System.out.println("Exception in CalendarTest in main:"+ye.toString());
           ye.printStackTrace();
       }
       catch(Exception e)
       {
           System.out.println("Exception in CalendarTest in main:"+e.toString());
           e.printStackTrace();
       }

    }
}