java - 如何将所需的长度设置为数组中的整数？

Question

如果客户 ID 号码的长度与 5 位数字不匹配，如何允许用户重新输入该号码？

    for (int i = 0; i < 5; i++) {
        System.out.println("Enter the 5-digit ID number of your customer "
                + (i + 1) + "'s below:");
        customerID[i] = myScanner.nextLine();

        if (customerID[i].length() != 5) {
            // What code goes here. I just want to make it so they can
            // re-enter the customerID
        }

Answer 1

这是一种方法:

while(true)
{
    customerID[i] = myScanner.nextLine();
    if(customerID[i].length() == 5) break;
    System.out.print("Should be of length 5! Try Again: ");
}