help me fix this java code please? how do I put a restriction on string length before I enter the input.?

Question

the code I'm working on translates letters into phone numbers, but program must verify that the length of the entered string is exactly 10 or 11. If the length of the string is below 10 or above 11, it should be rejected, and the code displays invalid. how can I put the part where it restricted the length of stringth before the loop, so before I enter any input, the string length must between 10 and 11

Answer 1

boolean numberIsValid;

System.out.println("Enter a valid 10 or 11 digit phone number");

do {

String phoneNumber = (use a scanner to collect it) ...

numberIsValid = (10 == phoneNumber.length() || 11 == phoneNumber.length() ) ;

if (!numberIsValid) System.out.println("You must enter 10 or 11 digits\nTry again");

while (!numberIsValid);

Answer 2

Scanner scan = new Scanner(System.in);

String inputString;

do {

System.out.print("Enter phone number (10 or 11 digits): ");

inputString = scan.nextLine();

if (inputString.length() < 10 || inputString.length() > 11) {

System.out.println("Invalid length for inputString");

} // end if

} while (inputString.length() < 10 || inputString.length() > 11);

Answer 3

int maxLength = (inputString.length() < MAX_CHAR)?inputString.length():MAX_CHAR;

inputString = inputString.substring(0, maxLength);



try this one