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Java Java Objects (Retired) Delivering the MVP Validation

Emeka Okoro
PLUS
Emeka Okoro
Courses Plus Student 11,724 Points

exercise on validation in delivering the mvp

i need help with this .. the error seems to be in my second if condition

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.charAt(0) != 'm') {
      throw new IllegalArgumentException("make this a member variable");
    }
    if(!Character.isUppperCase(fieldName.charAt(1))) {
      throw new IllegalArgumentException("use camelCasing");
    }
    return fieldName;
  }

}
Gareth Gray
Gareth Gray
3,336 Points

Really hope I'm wrong but is the error here simply because of the extra 'p' in '.isUpperCase'?

3 Answers

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' || !Character.isUpperCase(fieldName.charAt(1))) {
      throw new IllegalArgumentException();
    } else {
      return fieldName;
    }
  }

Sure! No problem! Would you mind marking my answer as 'best answer'? Thanks!