输出当前月份日历（Print a calendar of present month）

最新推荐文章于 2025-07-13 12:30:35 发布

原创最新推荐文章于 2025-07-13 12:30:35 发布 · 1.5k 阅读

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#calendar #日历 #string #三星 #java

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本文介绍了一个使用Java编写的简单程序，该程序能够打印出当前月份的日历视图，并通过星号(*)标记今天日期，便于快速识别。代码利用了Java的Calendar类来获取日期和星期信息。

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/**
@version 1.0 2008-05-11
@author Cay S.Hostsman

Modified by Climbing Huang when learning Core Java 2
*/

import java.util.*;

public class CalendarTest_CN
{
public static void main(String[] args)
{
   // construct d as current date
   GregorianCalendar d = new GregorianCalendar();

   int today = d.get(Calendar.DAY_OF_MONTH);
   int month = d.get(Calendar.MONTH);

   // set d to start date of the month
   d.set(Calendar.DAY_OF_MONTH, 1);

   int weekday = d.get(Calendar.DAY_OF_WEEK);

   // print heading
   System.out.println("星期一  星期二  星期三  星期四  星期五  星期六  星期日");

   // indent first line of calendar
   for (int i = Calendar.MONDAY; i < weekday; i++ )
      System.out.print("        ");

   do
   {
      // print day
      int day = d.get(Calendar.DAY_OF_MONTH);
      System.out.printf("%6d", day);

      // mark current day with *
      if (day == today)
         System.out.print("* ");
      else
         System.out.print("  ");

      // start a new line after every Saturday
      if (weekday == Calendar.SUNDAY)
         System.out.println();

      // advance d to the next day
      d.add(Calendar.DAY_OF_MONTH, 1);
      weekday = d.get(Calendar.DAY_OF_WEEK);
   }
   while (d.get(Calendar.MONTH) == month);
   // the loop exits when d is day 1 of the next month

   // print final end of line if necessary
   if (weekday != Calendar.MONDAY)
      System.out.println();
}
}

A snapshot of execution result: