纸上得来终觉浅，绝知此事要躬行。

 1 /**
 2      * 让我们手写一个日历吧
 3      * @param args
 4      */
 5     public static void main(String[] args) {
 6         LocalDate date = LocalDate.now();
 7         int month = date.getMonthValue();
 8         int today = date.getDayOfMonth();
 9         
10         date = date.minusDays(today - 1);    // Set to start of month
11         DayOfWeek weekday = date.getDayOfWeek();
12         int value = weekday.getValue();        // 1 = Monday ...7 = Sunday
13         
14         System.out.println("Mon Tue Mon Thu Fri Sat Sun");
15         for(int i = 1; i < value; i ++)
16             System.out.print("    ");
17         while (date.getMonthValue() == month) 
18         {
19             System.out.printf("%3d", date.getDayOfMonth());
20             if (date.getDayOfMonth() == today) 
21                 System.out.print("*");
22             else
23                 System.out.print(" ");
24             date = date.plusDays(1);
25             if (date.getDayOfWeek().getValue() == 1) System.out.println();
26         }
27         if (date.getDayOfWeek().getValue() != 1) {
28             System.out.println();
29         }
30     }