Java核心技术之Date相关

import java.time.DayOfWeek;
import java.time.LocalDate;
import java.util.Scanner;

/**
 * @author Sunshine
 * @version 1.0
 * @date 2020/9/21 11:26
 */
public class FxHello {
    public static void main(String[] args) {
        dateDemo();
    }

    private static void scanner() {
        Scanner scanner = new Scanner(System.in);
        // name
        System.out.println("what's your name?");
        String name = scanner.nextLine();
        // get second input 19
        System.out.print("How old are you? ");
        int age = scanner.nextInt();
        System.out.println("hello,"+name+ ".Next year you'll be "+(age+1));
    }
    private static void dateDemo() {
        LocalDate date = LocalDate.now();
        int month = date.getMonthValue();
        int today = date.getDayOfMonth();

        // Set to start of month
        date = date.minusDays(today - 1);
        DayOfWeek weekday = date.getDayOfWeek();
        // 1 - Monday,... 7 = Sunday
        int value = weekday.getValue();

        System.out.println("Mon Tue Wed Thu Fri Sat Sun");
        for (int i = 0; i < value; i++) {
            System.out.print("    ");
            while (date.getMonthValue() == month) {
                System.out.printf("%3d", date.getDayOfMonth());
                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();
            }
        }
    }
}

　　就是一个月的日历  显示当前是星期几，今天是几号