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Java Java Objects (Retired) Delivering the MVP Validation


Why does'nt this Java code work?

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
    char one = fieldName.charAt(1);
    if(fieldName.charAt(0) != 'm' && !one.isUpperCase()) {
    throw new IllegalArgumentException();
    return fieldName;


1 Answer

You need to call the method like this:


However there is further work with the logic of your expression, but I'll leave that to you as it's better to learn that way.

: )

Thanks :)