【Java】LocalDate类编写一个日历程序

 1 import java.time.*;
 2 
 3 public class CalendarTest {
 4     public static void main(String[] args) {
 5         LocalDate date = LocalDate.now();
 6         int month = date.getMonthValue();
 7         int today = date.getDayOfMonth();
 8         
 9         date = date.minusDays(today-1);
10         DayOfWeek weekday = date.getDayOfWeek();
11         int value = weekday.getValue();
12         
13         System.out.println("Mon Tue Wed Thu Fri Sat Sun");
14         for(int i = 1;i< value;i++)
15             System.out.println("    ");
16         while(date.getMonthValue() == month)
17         {
18             System.out.printf("%3d",date.getDayOfMonth());
19             if(date.getDayOfMonth()==today)
20                 System.out.printf("*");
21             else
22                 System.out.printf(" ");
23             date = date.plusDays(1);
24             if(date.getDayOfWeek().getValue() == 1) System.out.println();
25         }
26         if(date.getDayOfWeek().getValue() !=1 ) System.out.println();
27     }
28 }

 

利用LocalDate类编写一个日历程序，可处理星期几以及各月天数不同等问题

我们不需要了解LocalDate类如何计算类，只需要使用这个类的借口就可以了。