java编写的日历类程序，输入年份和月份，打印出该月的日历

import java.util.Calendar;
import java.util.Scanner;


public class Calendar_M {

/**
 * @param args
 */

public static void main(String[] args) {
int year,month;
Scanner scan = new Scanner(System.in);
System.out.println("请输入年份：");
year = scan.nextInt();
System.out.println("请输入月份：");
month = scan.nextInt();

Calendar cd = Calendar.getInstance();

//设置日期为某年某月的第一天,得到这一天是星期几，一代表星期天，二代表星期一
cd.set(year,month-1,1);
int week = cd.get(Calendar.DAY_OF_WEEK);
int len = week - 1;
System.out.println("星期" + week);
 
//平年、闰年每月的天数
int [] dayofP = new int[]{31,28,31,30,31,30,31,31,30,31,30,31};
int [] dayofR = new int[]{31,29,31,30,31,30,31,31,30,31,30,31};