参考 - P102~P103

1. 目标

生成一个日历,格式如下图所示。

ps: 当前的天数需要标记为*

2. 核心

对日历的变量

import java.time.*;
public class CalendarTest{public static void main(String[] args) {LocalDate date = LocalDate.now();	// 获取当前日期int month = date.getMonthValue();	// 获取当前月份int today = date.getDayOfMonth();   // 获取当前的天数date = date.minusDays(today - 1);	// 将当前日期设置为月初while(date.getMonthValue() == month) {		// 只要是当月就输出,否则跳出循环System.out.printf("%3d", date.getDayOfMonth());date = date.plusDays(1);}}
}

3. 实现

在核心部分实现了日历的循环打印,接下来只需要补全表头、当前日期和换行即可.

import java.time.*;public class CalendarTest{public static void main(String[] args) {LocalDate date = LocalDate.now();int month = date.getMonthValue();int today = date.getDayOfMonth();date = date.minusDays(today - 1);       // 设置为本月的开头DayOfWeek  weekday = date.getDayOfWeek();     // 获取星期几int value = weekday.getValue();     // 将星期几兑换成对应的数字System.out.println("Mon Tue Wed Thu Fri Sat Sun");  // 日历头for(int i = 1; i < value; i++) {    // 打印对应的空格System.out.print("    ");}while(date.getMonthValue() == month) {System.out.printf("%3d", date.getDayOfMonth());     // 获取当前多少号if(date.getDayOfMonth() == today) {System.out.print("*");} else {System.out.print(" ");}date = date.plusDays(1);if(date.getDayOfWeek().getValue() == 1){System.out.println();}}if (date.getDayOfWeek().getValue() != 1) System.out.println();}
}