Instantiate Inheritance?

Question

Hey I'm writing a shape inheritance program where I'm supposed to create a main class, a shape class, a 4 different dimension classes, and 4 different shape classes. I wrote a similar program in C# and so tried transferring over some of the code but the instantiate process doesn't seem to be working. Specifically every line of code below has the same error except the last one.
The first 5 lines
"Cannot find symbol
Symbol: Class Shape (Exchanging shape with, Point, Line, Circle, etc depending on the line)
Location: Class Shapes.Main"
The last line gives the error "Shapes.Shape is abstract; cannot be instantiated"
Shape s = new Shape();
I assume this is the real cause to the problem, but I'm unaware of what to do..
        Shape[] s = new Shape[4];
        s[0] = new Point(1, 2, 3);
        s[1] = new Line(new Point(2, 3, 4), new Point(4, 5, 6));
        s[2] = new Circle(new Point(5, 2, 8), 20);
        s[3] = new Sphere(new Point(4, 2, 3), 45);
Shape s = new Shape();I provided a 4 classes, the main, the shapes class, 1 of the dimensions, and 1 of the shapes.
package Shapes;
@author student
*public class Main {*
*@param args the command line arguments*
    public static void main(String[] args) {
        Shape[] s = new Shape[4];
        s[0] = new Point(1, 2, 3);
        s[1] = new Line(new Point(2, 3, 4), new Point(4, 5, 6));
        s[2] = new Circle(new Point(5, 2, 8), 20);
        s[3] = new Sphere(new Point(4, 2, 3), 45);
        Shape s = new Shape();
        //For Loop with if statements in order
        for (int i = 0; i < s.Length; i++) //to check identifier type
            if (s[i] instanceof Point) {
                Point P = (Point) s;
if (s[i] instanceof Line) {
Line L = (Line) s[i];
L.GetLength();
if (s[i] instanceof Circle) {
Circle C = (Circle) s[i];
if (s[i] instanceof Sphere) {
Sphere B = (Sphere) s[i];
} //Calling Print and Move statements
s[i].Print();
s[i].Move(2, 2, 2);
s[i].Print();
System.out.println("\n");
package shapes;
@author Student
*abstract class Shape {*
* protected int ShapeID;*
* static private int X = 1000;*
* //Shape Constructor*
* public Shape() {*
* ShapeID = X;*
* X++;*
* //Get Method for ID*
* public int GetID() {*
* return ShapeID;*
* //toString
+    public abstract void Print();+
+    abstract public void Move(int a, int b, int c);+
*+}+* package shapes;
abstract class ZeroDShape extends Shape {
abstract public void Print();
abstract public void Move(int a, int b, int c);
}package shapes;
* @author Student
class Sphere extends ThreeDShape {
private double Volume;
private Point Loc;
//Constructor
public Sphere(Point A, double R) {
Loc = A;
Volume = 4 / 3 * Math.PI * (R * R * R);
//Get Volume Method
public double GetVolume() {
return Volume;
//Print Method
public void Print() {
System.out.println("Sphere:");
System.out.println(super.toString());
System.out.println("Volume = " + Volume);
System.out.println("Location Sphere: " + Loc + "\n");
//Move Method
public void Move(int a, int b, int c) {
Loc.Move(a, b, c);
}Any advice or feedback would be much appreciated, thank you in advance.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Answer 1

Wolverine72 wrote:
The last line gives the error "Shapes.Shape is abstract; cannot be instantiated"Absolutely correct.
Shape s = new Shape();Absolutely wrong. You never use new with an abstract class. They are written specifically for extension, and you use it with the subclass.
I assume this is the real cause to the problem, but I'm unaware of what to do..Well I guess the question is: why are you doing it? You've already set up your shapes.
Plus, the following looks very suspicious:
static private int X = 1000;
//Get Method for ID
public int GetID() {
   return ShapeID;
}The whole point of polymorphism is to avoid exactly this kind of dispatch-type logic.
Don't "get a method for the ID"; override it correctly in your subclass. Java will make sure that the correct method is called.
HIH
Winston