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Java Java Objects (Retired) Delivering the MVP Validation

Angel Brambila
Angel Brambila
5,847 Points
Posted by Angel Brambila
Angel Brambila
5,847 Points

I Think Im Lost X_X

i make this code, i try it on the repl, the validation of each one, but in the code challenge, it said "Expected m_first to fail" but it pass.

TeacherAssistant.java 
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  

    char firstLetter = 'm',
         secondLetter = fieldName.charAt(1);
    boolean secondVal = (Character.isLetter(secondLetter) && Character.isUpperCase(secondLetter));
    if (firstLetter != fieldName.charAt(0) && secondVal == false) {
    throw new IllegalArgumentException (firstLetter + "is not m character and " + secondLetter + "Is not a letter"); 
    }
    return fieldName;
  }

}

2 Answers

Christopher Augg
Christopher Augg
21,223 Points
Christopher Augg
Christopher Augg
21,223 Points

Hello Angel,

You actually did a great job on this. You only have 1 logical error in your code. The error you are getting is saying that the code should have thrown an exception because "m_first" should not pass validation since _ does not meet the requirements. This gives a hint as to where your error is in your code.

Hint: If a member field must start with the letter 'm' AND (&&) a member field's second character must be an uppercase letter, then validation fails if one OR (||) the other fails and we should throw an exception.

Your logical error is in this part of your code:

        if (firstLetter != fieldName.charAt(0) && secondVal == false) {
           throw new IllegalArgumentException (firstLetter + "is not m character and " + secondLetter + "Is not a letter"); 
        }

Regards,

Chris

Angel Brambila
Angel Brambila
5,847 Points
Angel Brambila
Angel Brambila
5,847 Points

True, i solve it yesterday, i see my mistake, i facepalm really hard xD, thank you Chris :D!. I'll keep practicing :).

P.S : Sorry if my english is not really good, im from Mexico :3.