如何用Java写一个日历

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.TextStyle;
import java.util.Locale;
import java.util.Scanner;
public class PracticeTime {
  public static void main(String[] args) {
  Scanner input = new Scanner((System.in));
  System.out.println("请输入一个年份+月份");
  int year = input.nextInt();
  int month = input.nextInt();
  //创建对象，得到本月第一天
  LocalDate date = LocalDate.of(year,month, 1);
  //得到本月名称，1是一月，5是五月...
  String monthname = date.getMonth().getDisplayName(
    TextStyle.FULL,Locale.getDefault());
  //当前月的天数
  int dayOfMonth = date.lengthOfMonth();
  //日历的表头
  System.out.println(year+"年              "+monthname );
  System.out.println("--------------------------------------------"); 
  System.out.printf("%10s%10s%10s%10s%10s%10s%10s%n","一","二","三","四","五","六","日");
  //返回本月1日是周几，返回值是1则为星期一，返回值为7则为周日
  int dayOfWeek = date.getDayOfWeek().getValue();
  //输出空格部分
  for  (int i = 2; i <= dayOfWeek; i++) 
    System.out.printf(" %4s","  ");
    //输出数字部分
    for (int i = 1; i <= dayOfMonth ; i++) {
    System.out.printf(" %4d",i);
      //满一周换行
    if ((dayOfWeek + i-1)%7==0) {
      System.out.println();
    }
  }
  }
}