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Michael LaCroix
5,828 PointsStruggling to verify capitalization of specific character
I need to verify the capitalization of the second character seeing as it's a member variable.
I'm pretty sure I need to use either some form of not upper case (! = isUpperCase) or throwing the exception if I find a lower case (isLowerCase). I also need to specifically check the second character with (charAt(1)), I think. I can't figure out how to combine these methods. I've tried a number of variations and nothing seems to pan out. Thoughts?
public class TeacherAssistant {
public static String validatedFieldName(String fieldName) {
if (fieldName.charAt(0) != 'm' || fieldName.isLowerCase(charAt(1)) {
throw new IllegalArgumentException("Field must begin with 'm' and second letter must be capitalized.");
}
// 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
return fieldName;
}
}
2 Answers
Cristian Altin
12,165 PointsTry Character.isLowerCase(fieldName.charAt(1)) instead
Michael LaCroix
5,828 PointsThank you!!!! Didn't know I need the Character class. Still not really sure how all this fits together, but I guess that's part of learning:)
!Character.isUpperCase(fieldName.charAt(1)) is what ended up working, but you gave me the clue I needed.
Cristian Altin
12,165 PointsGlad to be of help. You basically negated the UpperCase doing the same as my answer, but maybe the exercise was expecting a not expression. If you remember to upvote or mark my answer it would be nice.