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Neil Gordon
8,823 PointsTeacher Assistant Help for challenge. I think I am close but I am not seeing why i have 4 errors
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
String mTeacherassistant = fieldName;
//member fields start with letter 'm'
Boolean mFieldLetterM = fieldName.startsWith('m');
//true or false for an uppercase letter second position
boolean mFieldUpperCase = Character.isUpperCase(fieldName.charAt(1));
if(!mFieldLetterM || !mFieldUpperCase) {
throw new IllegalArgumentException("field must start with an'm' and CamelCasing");
}
}
return fieldName;
}
}
4 Answers
Kevin Faust
15,353 PointsHey Neil
public class TeacherAssistant {
public static String validatedFieldName(String fieldName) {
// you never used this: String mTeacherassistant = fieldName;
Boolean mFieldLetterM = fieldName.charAt(0) == 'm';
boolean mFieldUpperCase = Character.isUpperCase(fieldName.charAt(1));
if(mFieldLetterM && mFieldUpperCase) {
return fieldName;
}
// unnecessary bracket here }
throw new IllegalArgumentException("field must start with an'm' and CamelCasing");
}
}
First off you need to use the charAt() method to check if the 'm' is first. startsWith() deals with strings but we are just concerned with a char
Instead of || we want to use && because if both conditions are not true, then we want to throw the error.
You also had an unecessary bracket near the end
You also created a variable but never used it. Just wanted to point that out
And lastly in the code I posted above, I modified it a little bit because the code checker wasn't allowing me to pass. not sure why.
But anyways if you have any other questions feel free to let me know,
Kevin
Neil Gordon
8,823 Pointsi figured it out my language was off
Neil Gordon
8,823 Pointsthank you your version is a lot cleaner
Kevin Faust
15,353 PointsGlad it made sense. Here is a version with even less code:
public class TeacherAssistant {
public static String validatedFieldName(String fieldName) {
if (fieldName.charAt(0) == 'm' && Character.isUpperCase(fieldName.charAt(1))) {
return fieldName;
}
throw new IllegalArgumentException("ERROR");
}
}
Instead of creating variables, we can just directly put our conditions in our if statement.
Neil Gordon
8,823 Pointsthat makes sense, less code is better thank you