BJP4 练习 3.20： 输入出生日期

Question

编写一个名为 inputBirthday 的方法，该方法接受控制台的扫描仪作为参数，并提示用户输入出生月份、日期和年份，然后以合适的格式打印出生日期。下面是与用户的对话示例：我需要像这样接受这个输入 -你出生在一个月中的哪一天？8你出生的月份叫什么名字？五月你出生在哪一年？1981输出应该是这样的——您出生于1981年5月8日。你老了！

Answer 1

public static void inputBirthday(Scanner input) {

     Scanner start = new Scanner(System.in);

    System.out.print("On what day of the month were you born? ");

    int day = input.nextInt();

    System.out.print("What is the name of the month in which you were born? ");

    String month = input.next();

    System.out.print("During what year were you born? ");

    int year = input.nextInt();

     System.out.println("You were born on " + month + " " + day + "," + " " + year + "." + " You're mighty old!");

}

Answer 2

public static void main(String[] args) {

    Scanner in = new Scanner(System.in);

    // either instantiate the enclosing class, or make inputBirthday static

    inputBirthday(in);

    }

  public static void inputBirthday(Scanner abc)

 {

    System.out.print("On what day of the month were you born? ");

    int inputDay = abc.nextInt();

    System.out.print("What is the name of the month in which you were born? ");

    String inputMonth = abc.next();

    System.out.print("During what year were you born? ");

    int inputYear = abc.nextInt();

    System.out.println("You were born on " + inputMonth + " " + inputDay + "," + " " + inputYear + "." + " You're mighty old!");

    }

最后它工作了，代码通过了所有测试

Answer 3

我认为问题在于，要求明确规定你要编写一个名为接受对象的方法。您已经编写了一个方法，然后编写了一个正在接受 的方法。inputBirthdayScannermaininputBirthdayString, int, int

将代码从方法移动到方法，删除扫描仪实例化，并修改方法以接受扫描仪（可能是 .maininputBirthdayinputBirthdayinputBirthday(Scanner abc)

编写的代码在 intellij 中工作，因为它是一个完整的程序。但对于网站，他们希望有一个特定的方法签名。这种方法与此类在线代码位置所期望的没有什么不同。leetcode

OP进行了编辑，但同样，要求规定该方法应如下所示：

public void inputBirthday(Scanner abc) {

    System.out.println("On what day of the month were you born? ");

    int inputDay = abc.nextInt();

    System.out.println("What is the name of the month in which you were born? ");

    String inputMonth = abc.next();

    System.out.println("During what year were you born? ");

    int inputYear = abc.nextInt();

    System.out.println("You were born on " + inputMonth + " " + inputDay + "," + " " + inputYear + "." + " You're mighty old!");

}

所以，再次：

获取方法签名以匹配要求（不清楚它是否应该是静态的，因此可能需要是）。public static inputBirthday(Scanner abc)

不要在方法中实例化扫描仪。inputBirthday

要从 IDE 进行测试，请执行以下操作：

public static void main(String[] args) {

  Scanner in = new Scanner(System.in);

  // either instantiate the enclosing class, or make inputBirthday static

  inputBirthday(in);

}