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Start your free trialFurkan Demirkan
7,926 PointsImproper use of isUpperCase in the Java 'Validation' challenge. Please help!
Here is my code...
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
if(fieldName.charAt(0)!='m'){
throw new IllegalArgumentException("Doesnt start with m");
}
char secondLetter = fieldName.charAt(1);
if(secondLetter.isUpperCase == false){
throw new IllegalArgumentException("Non-CamelCased");
}
return fieldName;
}
}
Im pretty sure I did everything else correctly, but I cant figure out how to use the 'isUpperCase'. I have found a few examples on google, but none fit my needs. Thanks in advance!
3 Answers
moonshine
8,449 PointsIn java char
is a primitive — it has no methods. Character
is an object that has a method named "isUpperCase
." One adjustment:
if (Character.isUpperCase(secondLetter) == false) {
Craig Dennis
Treehouse TeacherAlso Character.isUpperCase
returns a boolean
so you can negate it.
// This is more standard
if (!Character.isUpperCase(secondLetter)) {
// Than
if (Character.isUpperCase(secondLetter) == false) {
Furkan Demirkan
7,926 PointsThanks!
Derek Markman
16,291 PointsI feel so dumb, I couldn't remember how to target a specific character inside of a String... Thanks! this helped me a lot and gave me a better understanding of it all.
Furkan Demirkan
7,926 PointsFurkan Demirkan
7,926 PointsThanks!