java计算最近五年的黑色星期五

黑色星期五就是这个月的13号刚好是星期五

package com.oracle.core;

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

public class CalendarStudy
{

	Calendar c=new GregorianCalendar();
	Scanner scanner=new Scanner(System.in);
	public static void main(String[] args)
	{
		CalendarStudy study=new CalendarStudy();
		study.black5();
		
	}

	public void black5()
	{
		int year=c.get(Calendar.YEAR);
		for(int i=year;i<year+5;i++)
		{
			for(int j=0;j<=11;j++)
			{
				c.set(i, j, 13);
				if((c.get(Calendar.DAY_OF_WEEK)-1)==5)
				{
					System.out.println(c.get(Calendar.YEAR)+"年"+(c.get(Calendar.MONTH)+1)+"月"+"13日不宜出行");
				}
			}
		}
		
	}
	
}

运行结果：