Java初级编程示例：日历小程序

Java日历小程序

import java.time.*;

public class test1 {

public static void main(String[] args)
{
//
LocalDate date = LocalDate.now();
int Month = date.getMonthValue();
int Today = date.getDayOfMonth();

date = date.minusDays(Today-1);
DayOfWeek WeekDay = date.getDayOfWeek();
int Value = WeekDay.getValue();

//输出日历表头，每个星期中间使用制表符
System.out.println("Mon Tue Wed Thu Fri Sat Sun");

//通过for循环将每月1号之前的空位用制表符缩进，用Value的值来控制
//需注意此处的空字符是Tab
for(int i = 1; i < Value; i++)
System.out.print("  ");

//用while来循环显示每月的每一天
while(date.getMonthValue() == Month)
{

//输出对应日期
System.out.printf("%d", date.getDayOfMonth());

//如果此时输出的日期等于之前获得的当前日期Today，则在日期后加*标识，后边记得加Tab，否则直接Tab
if(date.getDayOfMonth() == Today)
System.out.print("* ");
else
System.out.print("  ");

//给日期加一
date = date.plusDays(1);

//如果此时星期对应的值为1，即下一个要打印的日期为星期一一列，则回车换行
if(date.getDayOfWeek().getValue() == 1)
System.out.println();
}

if(date.getDayOfWeek().getValue() != 1)
System.out.println();
}
}