158 - 打印双休日

[java]代码库

import java.util.*;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;

public class Main {
	public static void main(String[] args) throws ParseException
	{
		Scanner scan = new Scanner(System.in);

		int y = scan.nextInt();
		int m = scan.nextInt();
		Calendar a = Calendar.getInstance();//创建实例 默认是当前时刻 
		a.set(Calendar.YEAR, y);
		a.set(Calendar.MONTH, m - 1);//因为月份是从0月开始的
		int daymix = a.getActualMaximum(Calendar.DAY_OF_MONTH);//某月的最大天数
		for ( int i = 1; i <= daymix; i++)
		{ 
			String dd = y + "-" + String.format("%02d", m) + "-" + String.format("%02d", i);//格式化为至少2位十进制整数
			DateFormat f = new SimpleDateFormat("yyyy-MM-dd");
			Date d = f.parse(dd);//类型转换
			Calendar c = Calendar.getInstance();
			c.setTime(d);
			//DAY_OF_WEEK指这天是这周中的周几
			if ( c.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY || c.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY )
				System.out.println(dd);
		}
	}
}