BJP4 练习 3.20：输入生日

Question

编写一个名为 inputBirthday 的方法，该方法接受控制台的 Scanner 作为参数并提示用户输入出生年月日，然后以合适的格式打印出生日期。这是与用户对话的示例：

我需要这样输入-

On what day of the month were you born? 8
What is the name of the month in which you were born? May
During what year were you born? 1981

输出应该是这样的-

你是1981年5月8日出生的，年纪大了！

public static void main(String[] args) {

    inputBirthday();
}


  public static void inputBirthday() {
      Scanner abc = new Scanner(System.in);
      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!");
}

Answer 1

我认为问题在于要求明确规定您要编写一个名为 inputBirthday 的方法来接受 Scanner 对象。您已经编写了一个 main 方法，然后是一个接受 String, int, int.

的方法 inputBirthday

将代码从main方法移动到inputBirthday方法，摆脱扫描器实例化，并修改inputBirthday方法接受扫描器（可能inputBirthday(Scanner abc).

所写的代码可以在 intellij 中运行，因为它是一个完整的程序。但是对于站点，他们希望有一个特定的方法签名。这种方法与 leetcode 或其他此类在线代码地方所期望的没有什么不同。

OP 进行了编辑，但同样，要求规定方法应类似于：

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，再一次：

获取符合要求的方法签名（尚不清楚它是否应该是静态的，因此可能需要 public static inputBirthday(Scanner abc)）。
不要在 inputBirthday 方法中实例化扫描仪。

从 IDE 进行测试：

public static void main(String[] args) {
  Scanner in = new Scanner(System.in);
  // either instantiate the enclosing class, or make inputBirthday static
  inputBirthday(in);
}

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!");
    }

终于成功了，代码通过了所有测试

test results

Answer 3


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!");
}

BJP4 练习 3.20：输入生日

BJP4 Exercise 3.20: inputBirthday

java

methods

edx