Java实现打印日历（java.time写的）

简单的日期-时间类的练习例子

实现代码

import java.time.LocalDate;
import java.time.format.TextStyle;
import java.util.Locale;
import java.util.Scanner;

public class PrintCalendar {
	public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		System.out.println("输入一个年份（如2019 ）");
		printCalendars(in.nextInt());
	}
	public static void printCalendars(int year) {
		for (int month = 1; month < 13; month++) {
			System.out.println();
			//得到本个月的第一天日期
			LocalDate dates = LocalDate.of(year, month, 1);
			String monthName = dates.getMonth().getDisplayName(TextStyle.FULL, Locale.getDefault());
			//返回当前月的天数
			int daysOfMonth = dates.lengthOfMonth();
			System.out.println(year+"年            "+monthName);
			System.out.println("-----------------------------------");
			System.out.printf("%10s%10s%10s%10s%11s%10s%10s%n", "日","一","二","三","四","五","六");
			int dayOfWeek = dates.getDayOfWeek().getValue();

			for (int i = 1; i <= dayOfWeek&&dayOfWeek!=7; i++) {
				System.out.printf("%5s", " ");
			}
			//输出该月的日期
			for (int i = 1; i <= daysOfMonth; i++) {
				System.out.printf("%5d",i);
				if ((dayOfWeek+i)%7==0) {
					System.out.println();
				}
			}
		}
	}
}

参考：Java语言程序设计第三版

测试结构

补充一小点

通用的日期，周日才是一个星期的第一天。