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Java Java Objects (Retired) Delivering the MVP Validation

Ray Cabatingan
Ray Cabatingan
3,549 Points

I think I already satisfied both exceptions. What is wrong with my code?

I think I already satisfied both exceptions namely 1. m should be the first letter on every field name then 2. second letter should be capitalized

public class TeacherAssistant {

  public static String validatedFieldName(String fieldName) {
    // These things should be verified:
    // 1.  Member fields must start with an 'm'
    // 2.  The second letter in the field name must be uppercased to ensure camel-casing
    // NOTE:  To check if something is not equal use the != symbol. eg: 3 != 4
    if (fieldName.charAt(0) != 'm') {
       throw new IllegalArgumentException("Member fields must start with an 'm'.");
    if (Character.isUpperCase(fieldName.charAt(1))) {
       throw new IllegalArgumentException("The second letter in the field name must be uppercased to ensure camel-casing.");
    return fieldName;


2 Answers

Cody Te Awa
Cody Te Awa
8,820 Points

Hi Ray, You have everything almost perfect just a tiny logic error: in your second if statement you are throwing an error if a second letter is uppercase however you should be omitting this case. So a sneaky exclamation mark at the start of that condition should fix your problem :) Keep up the great work Ray!! -CodyTheCoder