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Java Java Objects (Retired) Delivering the MVP Validation

Andrew Mitchell
Andrew Mitchell
2,739 Points

What the crap I get the message Bummer! "mFirstName" should have passed, but "mFirstName" was reported.

I get the message Bummer! "mFirstName" should have passed, but "mFirstName" was reported.

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

    if (fieldName.indexOf(0)!='m') {
     throw new IllegalArgumentException("mFirstName") ;
    }

    if (!Character.isUpperCase(fieldName.indexOf(1))) {
     throw new IllegalArgumentException("Must be camel-cased");
    }

    return fieldName;
  }

}

1 Answer

Clayton Perszyk
MOD
Clayton Perszyk
Treehouse Moderator 48,836 Points

I replaced your calls to indexOf() to charAt() and was able to get it to pass. You pass indexOf() a char and it returns an int that will be -1, if the character was not found; If the character was found the method will return the char's index. You pass charAt() an index value and it will return a char (i.e. a letter) which you can use for comparison.

Andrew Mitchell
Andrew Mitchell
2,739 Points

Thanks after your help and adding a block against underscores i passed the challenge :) :D thank you very much