get last name . concode_field_sep String firstName concode_elem_sep String lastName concode_elem_sep int studentNumber concode_elem_sep int grade concode_field_sep void setLastName concode_elem_sep int getKey concode_elem_sep void setFirstName concode_elem_sep boolean equals concode_elem_sep void setGrade concode_elem_sep void setStudentNumber concode_elem_sep String toString concode_elem_sep int getStudentNumber concode_elem_sep String getFirstName concode_elem_sep int getGrade
String function ( ) { return lastName ; }