Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Java Java Objects (Retired) Delivering the MVP Validation

Mozart Liessi
Mozart Liessi
2,618 Points

I don't Know what I got Wrong

In this challenge code I can't figure out what I got wrong

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


    // isUpperCase(Uppercase)?

    if (fieldName.indexOf(0) != 'm')
    {throw new IllegalArgumentException("the field name must starts with m");
    }
    if (Character.isUpperCase(fieldName.indexOf(1)) = false) 
    {throw new IllegalArgumentException("this fiels must be upper case");}



    return fieldName;
  }

}

1 Answer

Rob Bridges
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Rob Bridges
Full Stack JavaScript Techdegree Graduate 35,467 Points

Hey Mozart, just some help of where you start on this. Instead of using the indexOf method, use the charAt, also, you don't need to compare your second if check to False, you can just add an exclamation point in front of it. These tips should let you sort it out a bit better.

Thanks.

Mozart Liessi
Mozart Liessi
2,618 Points

Thanks very much, I got it