Re: access levels for private field which is inherited

thufir <>
Tue, 15 Apr 2008 23:06:17 GMT
On Sun, 13 Apr 2008 09:37:03 -0700, Mark Space wrote:

Anyway, calling super here is probably the best choice. Note than in
your example you must call super because Bar has no default constructor.

One can also provide a factory method such as newInstance below.

I want to use the factory method, but am running into a conceptual
problem with regards to packages, interfaces and casting. If I make
StudentDescriptor an interface then things would would work, or maybe a
cast? I'd like to keep StudentDescriptor an abstract class which Student
extends, and use the factory pattern.

I've seemingly painted myself into a corner with:

bcit@arrakis:~/java/src$ javac -d /home/bcit/java/prod/ -cp . a00720398/ a00720398/data/*.java
a00720398/ incompatible types
found :
                        Student student = Student.newStudent();
1 error
bcit@arrakis:~/java/src$ cat a00720398/data/

class StudentDescriptor
implements HasName, HasNumber {

        private String name = MY_NAME;
        private String number = MY_NUMBER;

        public StudentDescriptor() {}

        public static StudentDescriptor newInstance() {
                return new StudentDescriptor();

        public String getName() {
                return name;

        public String getNumber() {
                return number;

        public void setName(String name) {
       = name;

        public void setNumber(String number) {
                this.number = number;

        public String toString(){
                return getNumber() + ", " + getName();

bcit@arrakis:~/java/src$ cat a00720398/data/

public class Student extends StudentDescriptor {

        public static StudentDescriptor newStudent() {
                return StudentDescriptor.newInstance();




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