Teacher Assistant Validation

public class TeacherAssistant {

  public static String validatedFieldName(String fieldName) {
    if(fieldName.charAt(0) !== 'm'){
     throw new IllegalArgumentException("First character must be m");
    }
       if(!Character.isLetter(fieldName.charAt(1)) || !Character.isUpperCase(fieldName.charAt(1))   ){
             throw new IllegalArgumentException("Second letter must be capitalised");
       }
    // 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
    return fieldName;
  }

}