打印指定月份的双休日+注释

[java]代码库

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*; 
public class Main{ 
    public static void main(String[] args )throws ParseException { 
         Scanner scan = new Scanner(System.in);
         int year = scan.nextInt();
         int month = scan.nextInt();
 
         Calendar cal = Calendar.getInstance();
         Calendar calend = Calendar.getInstance();
         cal.clear();//清除获得的系统时间
         calend.clear();
         cal.set(year, month-1, cal.getActualMinimum(Calendar.DAY_OF_MONTH));//设置这个月的第一天，月份是0-11
         calend.set(year, month-1, calend.getActualMaximum(Calendar.DAY_OF_MONTH)-1);//设置为这个月的最后一天
         
         DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
         
         while(cal.getTime().getTime() <= calend.getTime().getTime()) {
        	 if((cal.get(Calendar.DAY_OF_WEEK)==7) || (cal.get(Calendar.DAY_OF_WEEK)==1)) {//从星期天算起，周二返回为3
        		 System.out.println(df.format(cal.getTime()));
        	 }
        	 cal.add(Calendar.DAY_OF_MONTH, 1);//日期+1
         }
         
         scan.close();  
    } 
}