黑色星期五

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Scanner;
public class Week5Black {

/** * @param args */public static void main(String[] args) {    System.out.println("输入起始年份。");    Scanner scan=new Scanner(System.in);    int year=scan.nextInt();    System.out.println("计算未来几年！");    int n=scan.nextInt();    getBlackFri(year,n);}private static void getBlackFri(int year, int n) {    SimpleDateFormat    sdf=new SimpleDateFormat("yyyy-MM-dd E");    int k=0;    Calendar cal=Calendar.getInstance();    while(k<n){        for(int i=0; i<12;i++){        cal.set(year,i,13);        if(5==(cal.get(Calendar.DAY_OF_WEEK)-1)){        System.out.println("黑色星期五："+sdf.format(cal.getTime()));        year++;        k++;}}}}

}