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Java Java Objects (Retired) Delivering the MVP Validation

Surely I'm worng with conditions, anyone can correct it ? Thanks

Condition is failing

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))) || (!Character.isLetter(fieldName.charAt(1))))) throw new IllegalArgumentException("Error first character must be uppercase");;

    return fieldName;
  }

}

2 Answers

I managed to get it, my excuses to community for disturbing, I checked against _ and used 3 OR cases

if ((fieldName.charAt(0) != 'm') || ((!Character.isUpperCase(fieldName.charAt(1))) || (fieldName.charAt(1) == '_')) throw new IllegalArgumentException("Error first character must be uppercase");;

if ((fieldName.charAt(0) != 'm') || ((!Character.isUpperCase(fieldName.charAt(1))) || (fieldName.charAt(1) == '_')) throw new IllegalArgumentException("Error first character must be uppercase");