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Java Java Objects (Retired) Delivering the MVP Validation

Ronit Mankad
Ronit Mankad
12,166 Points
Posted by Ronit Mankad
Ronit Mankad
12,166 Points

Logical error

My syntax is right but I still get the error : "Expected "firstName" to fail but it passed". Help.

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'  &&  !Character.isUpperCase(fieldName.charAt(1)) && fieldName.charAt(1)>='A' && fieldName.charAt(1)<='Z'){
          throw new IllegalArgumentException("The member variable must start with an 'm'\n");
     }
    return fieldName;
  }

}

1 Answer

Jeremy Hill
Jeremy Hill
29,567 Points

Your && portion is messing you up. It should have been || (or) not (and). Your code should look more like this:

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'  ||  (!(Character.isUpperCase(fieldName.charAt(1)))))
          throw new IllegalArgumentException("The member variable must start with an 'm'\n");

    return fieldName;
  }

}