如何在java扫描仪中仅接受信件

我的代码里有一个扫描器。我希望我的扫描仪只接受字母，如果检测到数字，则重复用户输入。你知道我该怎么做吗

以下是我的示例代码：

if (isFull() == false) {
    Scanner input = new Scanner(System.in);
    Passenger p = new Passenger();

    System.out.print("Enter first name: ");
    p.setName(input.nextLine());

    System.out.print("Enter surname: ");
    p.setSurname(input.nextLine());

    queueArray[last] = p;
    last = (last + 1) % queueArray.length;
    System.out.println("Passenger entered is now in position " + last);
    System.out.println("");
}

---

您可以使用正则表达式模式确定用户输入是数字还是字符串：

public static void main(String[] args) {
    Scanner input = new Scanner(System.in);

    System.out.print("Enter first name: ");
    String a = input.nextLine();

    Pattern p = Pattern.compile("\\d+");
    Matcher m = p.matcher(a);
    if(m.matches()){
        System.out.println("all characters are digits!");
    }
    else System.out.println("its a normal string");
}