How many lexemes does the following Java code contain?
1. public class CountDigits {
2. public static void main(String[] args) {
3. SimpleIO. prompt("Enter an integer: ");
4. String userInput = SimpleIO. readLine();
5. int number = Integer. parseInt(userInput);
6. int numDigits = 0;
7. while (number > 0) {
8. number /= 10;
9. numDigits++;
10. }
11. System. out. println("The number " + userInput + " has " +
12. numDigits + " digits");
13. }
14. }