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Michael Harper
14,741 PointsValidation test failing
No compiler errors are thrown in Preview, but solution fails with error: Bummer! Expected "m_first_name" to fail but it passed.
Where is "m_first_name" coming from in this example?
public class TeacherAssistant {
public static String validatedFieldName(String fieldName) {
// These things should be verified:
// 1. Member fields must start with an 'm'
if ( fieldName.charAt(0) != 'm') {
throw new IllegalArgumentException("member field " +fieldName+ " doesn't start with m.");
}
// 2. The second letter in the field name must be uppercased to ensure camel-casing
boolean lowCase = Character.isLowerCase(fieldName.charAt(1));
if (lowCase) {
throw new IllegalArgumentException("member field " +fieldName+ " second char is not upper case.");
}
return fieldName;
}
}
1 Answer

Grigorij Schleifer
10,363 PointsHi MIchael,
you can use this:
boolean lowCase = Character.isUpperCase(fieldName.charAt(1);
or:
if (!Character.isUpperCase(fieldName.charAt(1))) {
throw new IllegalArgumentException("some massage");
}
for the upper case examination.
Grigorij
Michael Harper
14,741 PointsMichael Harper
14,741 PointsThanks G, using isUpperCase() instead of isLowerCase() seems to deal with illegal characters in a more expected way.
Grigorij Schleifer
10,363 PointsGrigorij Schleifer
10,363 PointsHey M
the logic of your code is good, but I think the challenge wants us to use isUpperCase() method.
See you in the forum
G