LocalDate类

import java.time.DayOfWeek;
import java.time.LocalDate;

public class Demo3_3_2 {

    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();
        System.out.println(weekday);
        int weekdayv = weekday.getValue();
        System.out.println("Mon    Tue    Wed    Thu    Fri    Sat    Sun");
        for(int i = 1;i<weekdayv;i++) {
            System.out.print("    ");
        }
        
        while(date.getMonthValue() == month) {
            System.out.printf("%3d",date.getDayOfMonth());
            if(date.getDayOfMonth() == today) {
                System.out.print("*\t");
            }else {
                System.out.print("\t");
            }
            date = date.plusDays(1);
            if(date.getDayOfWeek().getValue() == 1) {
                System.out.println();
            }
        }
        if(date.getDayOfWeek().getValue() != 1) {
            System.out.println();
        }
    }
}