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Java Java Objects (Retired) Delivering the MVP Validation

Mohammad hesam Ebrahiminejad
Mohammad hesam Ebrahiminejad
892 Points
Posted by Mohammad hesam Ebrahiminejad
Mohammad hesam Ebrahiminejad
892 Points

i cant get the lower case part

how can i check if its an upper or lower

TeacherAssistant.java 
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' || fieldName.charAt(1).isLowerCase()){   ()){
   throw new IllegalArgumentException(fieldName + "its not correct"); 
   }

    return fieldName;
  }

}

1 Answer

Shadd Anderson
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.a{fill-rule:evenodd;}techdegree seal-36
Shadd Anderson
Treehouse Project Reviewer
Shadd Anderson
.a{fill-rule:evenodd;}techdegree seal-36
Shadd Anderson
Treehouse Project Reviewer

When you send your code through, it gives you the error code that "char cannot be dereferenced." Basically, without going too deep into it, that just means that "isLowerCase()" can't be called on a "char", because a char is a value. However, it CAN be called on a "Character", which is an object TYPE, instead of an object VALUE. So what you'll have to do is change it to this:

... || Character.isLowerCase(fieldName.charAt(1))) {