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
Quinton Rivera
5,177 PointsError "mFirstName" should have passed, but "fieldName must start with m" was reported.
Not sure why I can't pass this challenge
public class TeacherAssistant {
public static String validatedFieldName(String fieldName) {
// These things should be verified:
// 1. Member fields must start with an 'm'
if(fieldName.indexOf(0) != 'm'){
throw new IllegalArgumentException("fieldName must start with m");}
// 2. The second letter in the field name must be uppercased to ensure camel-casing
if(fieldName.indexOf(1) < 'A' || fieldName.indexOf(1) > 'Z'){
throw new IllegalArgumentException("second letter in the field name must be uppercased");}
// NOTE: To check if something is not equal use the != symbol. eg: 3 != 4
return fieldName;}}
1 Answer
Seth Kroger
56,413 PointsYou need to use charAt() not indexOf() to get a character at a certain index. indexOf() is the other way around. It gives you the index of a certain character.