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Miguel Frey
686 Points.java:15: error: missing return statement
Hi, I'm having some troubles on the Teacher Assistant exercise, here's my code
public class TeacherAssistant {
public static String validatedFieldName(String fieldName) {
// These things should be verified:
char ch1 = fieldName.charAt(0);
char ch2 = fieldName.charAt(1);
if((ch1=='m')){ // 1. Member fields must start with an 'm'
if(Character.isUpperCase(ch2)){ // 2.The second letter in the field name must be uppercased to ensure camel-casing
return fieldName;
}
}
else {
throw new IllegalArgumentException("doesn't meet the requirements");
}
}
}
and this is the error that comes up when compiling
./TeacherAssistant.java:15: error: missing return statement } ^ 1 error I've checked on Google and this was the answer I found out.
"Provide a return statement after the end of the while loop, or throw some kind of an Exception (IllegalStateException?) if the code really shouldn't ever make it there."
I threw an exception so what am I doing wrong?
Thanks for any further help
2 Answers
Derek Markman
16,291 PointsIt is giving you that error message because you need to add an else clause to both of your if statements.
I refactored a little bit but it works as expected:
public class TeacherAssistant {
private static char char1;
private static char char2;
private static String mFieldName;
public static void main(String[] args) {
validateFieldName("mName");
System.out.println("validation successful");//will only run if no exception is thrown
System.out.println("The fieldName was: [" + mFieldName + "]");//will only run if no exception is thrown
}
public static String validateFieldName(String fieldName) {
char1 = fieldName.charAt(0);
char2 = fieldName.charAt(1);
mFieldName = fieldName;
if(char1 == 'm') {
if(Character.isUpperCase(char2)) {
return mFieldName;
} else {
throw new IllegalArgumentException("SECOND CHAR IS NOT UPPERCASE");
}
}
else {
throw new IllegalArgumentException("DOESN'T START WITH A 'm'");
}
}
}
Miguel Frey
686 Pointsoh good point, thanks for your help :)
Derek Markman
16,291 PointsNo problem.