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

Why does this give compiler error? Validation Code Challenge

I can't see why this would give compiler error. The editor console button only shows a black screen.

public class TeacherAssistant {

  public static String validatedFieldName(String fieldName) {
    // These things should be verified:
    // 1.  Member fields must start with an 'm'public static String validatedFieldName(String fieldName) {

    if ( fieldName.charAt(0) != 'm'){
      throw new IllegalArgumentException("error");

    // 2.  The second letter in the field name must be uppercased to ensure camel-casing
     if ( !Character.isUpperCase(fieldName.charAt(1)){
        throw new IllegalArgumentException("error");
    // NOTE:  To check if something is not equal use the != symbol. eg: 3 != 4
    return fieldName;


1 Answer

8,987 Points

In the second if statement, there are three opening parentheses and only two closing parentheses.

Thanks man! thought it would be something simple!