java - 确定日期是否是二进制的

Question

我有一个程序可以计算用户输入的日期是否是闰年。我想我已经全部了解了，但我还需要查看输入的日期是否是二进制日期(即 1/1/11。我不太确定解决此问题的最佳方法，也许是 charAt 引用？任何帮助将不胜感激!

//****************************
import java.util.Scanner;

public class leapYearCalc {
private int day = 0;
private int month = 0;
private int year = 0;
Scanner myScan = new Scanner (System.in);


//---------------------------------
//Constructor to accept and initialize instance data
//---------------------------------
public leapYearCalc(int day, int month, int year){
this.day=day;
this.month=month;
this.year=year;
}

//--------------------------------
//Get day
//--------------------------------
public int getDay(){
    System.out.println("Whats the day?");
    day = myScan.nextInt();
    return day;
}

//--------------------------------
//Get day
//--------------------------------
public int getMonth(){
    System.out.println("Whats the month in numerical form?");
    month = myScan.nextInt();
    return month;
}

//--------------------------------
//Get day
//--------------------------------
public int getYear(){
    System.out.println("Whats the year (i.e. 2004)?");
    year = myScan.nextInt();
        if (year<1582)
            System.out.println("Please enter a value above 1582");
    return year;
}


//--------------------------------
 //1. If a year is divisible by 4 it is a leap year if 2 does not apply.
 //2. If a year is divisible by 100 it is not a leap year unless #3 applies.
 //3. If a year is divisible by 400 it is a leap year.
//--------------------------------
//Calculate leap year   
public String toString() {
        if (year % 4 == 0) {
            if (year % 100 != 0) {
            System.out.println(year + " is a leap year.");
            }
            else if (year % 400 == 0) {
            System.out.println(year + " is a leap year.");
            }
            else {
            System.out.println(year + " is not a leap year.");
            }
        }
        else {
            System.out.println(year + " is not a leap year.");
        }
        return null;
    }

    //--------------------------------
    //Check to see if date is binary
    //--------------------------------
    public int getBinary(){
        while(month == 01 || month == 10)

            if(day == 01 || day == 10 && year == 00 || year == 01)
                System.out.println("It's a binary date!");
        System.out.println("It's not a binary date");
        return month;

    }
}

Answer 1

由于这是作业，我只会给你提示: 我敢打赌你所说的“二进制日期”是指年、月、日仅由“1”和“0”组成？

以下是提示:

1. 使用 SimpleDateFormat 将提供的日期转换为字符串。结果应仅包含 8 个字符:4 个字符表示年，2 个字符表示月，2 个字符表示日
2. 检查结果字符串是否包含全0或1。您可以使用for循环来检查每个字符，看看它们是“0”还是“1”，或者您可以简单地使用正则表达式来检查模式“^[01]+$”