Java第三周作业

代码：

package practice.test.demo; //包名：practice中的test中的demo

import java.io.BufferedInputStream; //io包中的BufferedInputStream类
import java.io.DataInputStream; //io包中的DateInputStream类
import java.io.IOException; //io包中的Ioexception类
//上面三行可以io.*表示，引入io中的所有类

public class LeapYear {
	private static int gregorianCutoverYear = 1582;

	public static boolean isLeapYear(int year) {
		return year >= gregorianCutoverYear ? ((year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0)))
				: (year % 4 == 0);
	}

	public static void main(String[] args) throws IOException {
		System.out.print("请输入4位数的年份以判断是否是闰年(按回车确认)：");
		BufferedInputStream bs = new BufferedInputStream(System.in);
		DataInputStream dis = new DataInputStream(bs);
		byte[] b = new byte[4];
		dis.read(b);
		String yearTemp = new String(b, "gbk");
		int year = 0;
		String bStr = "";
		try {
			year = Integer.parseInt(yearTemp);
			bStr = isLeapYear(year) ? "是" : "不是";
			System.out.println("                ");
			System.out.println(yearTemp + bStr + "闰年！");
		} catch (Exception e) {
			System.out.println("您输入的年份不是数字或不是四位数。提示：" + e.getMessage());
		}
		dis.close();
		bs.close();
	}
};

结果：