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Start your free trialJason Holt
10,041 PointsChecking Characters Case Java
Can't get this working. Don't know what I am missing. How do I check the characters in this string to see if they are a letter AND are uppercase? How can I do this with any length string? I'm lost here.
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("The first letter m is required");
}
if (Character.isLetter(fieldName.charAt(1)) == true && Character.isUpperCase(fieldName.charAt(1)) == false) {
throw new IllegalArgumentException("Capital Letter Needed");
} else if (Character.isLetter(fieldName.charAt(2)) == true && Character.isUpperCase(fieldName.charAt(2)) == false) {
throw new IllegalArgumentException("Capital Letter Needed");
}
return fieldName;
}
}
1 Answer
Craig Dennis
Treehouse TeacherSee (Character.isUpperCase)[http://docs.oracle.com/javase/7/docs/api/java/lang/Character.html#isUpperCase(char)]
Let me know if you don't get it from there!
Hope it helps!
Jason Holt
10,041 PointsJason Holt
10,041 PointsWhoah... well I tried this:
if(Character.isUpperCase(fieldName.charAt(1)) == false { exception code here }
and it worked... but it doesn't check for camel case on a third character (index 2)?