How to call paint() method during creating object

Question

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
class SomeShape extends JPanel {
     protected static float width;
     protected BasicStroke line = new BasicStroke(width, BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND);
class Oval extends SomeShape {
     Oval(float width) {
          this.width = width;
          line = new BasicStroke(width, BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND);
          repaint();
     public void paint(Graphics g) {
          Graphics2D pen = (Graphics2D)g;
          int i = 10;
          super.paint(g);
               g.setColor(Color.blue);
               g.drawOval(90, 0+i, 90, 90);
               System.out.println("paint()");
public class FinalVersionFactory {
    JFrame f = new JFrame();
    Container cp = f.getContentPane();
    float width = 0;
    SomeShape getShape() {
         return new Oval(width++); //I want to paint this oval when I call getShape() method
     public FinalVersionFactory() {
          f.setSize(400, 400);
//          cp.add(new Oval()); without adding
          cp.addMouseListener(new MouseAdapter() {
               public void mouseReleased(MouseEvent e) {
                    getShape();
          f.setVisible(true);
     public static void main(String[] args) { new FinalVersionFactory(); }
}I need help. When I cliked on the JFrame nothing happened. I want to call paint() method and paint Oval when I create new Oval() object in getShape(). Can you correct my mistakes? I tried everything...Thank you.

Answer 1

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
class SomeShape extends JPanel {
     protected static float width;
     protected static BasicStroke line = new BasicStroke(width, BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND);
class Oval extends SomeShape {
     static int x, y;
     Oval(float width, int x, int y) {
          this.width = width;
          this.x = x;
          this.y = y;
          line = new BasicStroke(width, BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND);
     public void paint(Graphics g) {
          Graphics2D pen = (Graphics2D)g;
               g.setColor(Color.blue);
               pen.setStroke(line);
               g.drawOval(x, y, 90, 90);
               System.out.println("Oval.paint()"+"x="+x+"y="+y);
class Rect extends SomeShape {
     static int x, y;
     Rect(float width, int x, int y) {
          this.width = width;
          this.x = x;
          this.y = y;
          line = new BasicStroke(width, BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND);
     public void paint(Graphics g) {
          Graphics2D pen = (Graphics2D)g;
               g.setColor(new Color(250, 20, 200, 255));      
               pen.setStroke(line);
               g.drawRect(x, y, 80, 80);
               System.out.println("Rect.paint()"+"x="+x+"y="+y);
public class FinalVersionFactory extends JFrame {
    Container cp = getContentPane();
    float width = 0;
    int x = 0;
    int y = 0;
        boolean rect = false;
    SomeShape getShape() {
         SomeShape s;
          if(rect) {
               s = new Rect(width, x, y);
               System.out.println("boolean="+rect);
          } else {
               s = new Oval(width++, x, y);
               System.out.println("boolean="+rect);
          System.out.println("!!!"+s); //print Oval or Rect OK
          return s; //return Oval or Rect OK
     public FinalVersionFactory() {
          setSize(400, 400);
          SomeShape shape = getShape();
          cp.add(shape); //First object which is add to Container(Oval or Rect), returned by getShape() method
          //will be paint all the time. Why? Whats wrong?
          cp.addMouseListener(new MouseAdapter() {
               public void mouseReleased(MouseEvent e) {
                    x = e.getX();
                    y = e.getY();
                    rect = !rect;
                    getShape();
                    cp.repaint(); //getShape() return Oval or Rect object
                                  //but repaint() woks only for object which was added(line 67) as first
          setVisible(true);
     public static void main(String[] args) { new FinalVersionFactory(); }
}I almost finish my program but I have last problem. I explained it in comment. Please look at it and correct my mistakes. I will be very greatful!!!
PS: Do you thing that this program is good example of adoption Factory Pattern?