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Start your free trialJian Chen
4,938 PointsHow do I check if input String has something in it that isn't a letter?
I have this and it said Bummer! Expected "m_first_name" to fail but it passed.
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("must be m");
}
Character.toUpperCase(fieldName.charAt(1));
return fieldName;
}
}
1 Answer
James Simshaw
28,738 PointsHello,
You almost have this one. You just need to check if the second character follows camel casing and is an upper case character in addition to the first letter being an m. If it isn't an upper case character, then you would also want to throw the IllegalArgumentException. My hint for this would be to check out static methods in the Character wrapper class. Documentation for it can be found at http://docs.oracle.com/javase/8/docs/api/java/lang/Character.html
Jian Chen
4,938 PointsJian Chen
4,938 PointsThanks James.
James Simshaw
28,738 PointsJames Simshaw
28,738 PointsYou're welcome, good luck with the rest of the challenges and courses.