Как изменить стиль формы и вообще всех объектов на свой стиль?

import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import java.awt.geom.*;
public class JSwingButton extends JButton
{
 private Paint rolloverHighlight, armedHighlight, borderHighlight, borderShadow;
 private Shape shape, upperBorder, lowerBorder;
 private Stroke borderStroke;
 public JSwingButton(String label, Paint rolloverHighlight, Paint armedHighlight, Paint borderHighlight, Paint borderShadow, Stroke borderStroke)
 {
   super(label);
   setContentAreaFilled(false);
   setRolloverEnabled(true);
   setFocusable(false);
   setRolloverHighlight(rolloverHighlight);
   setArmedHighlight(armedHighlight);
   setBorderHighlight(borderHighlight);
   setBorderShadow(borderShadow);
   setBorderStroke(borderStroke);
   setShape(new Ellipse2D.Double(0.0, 0.0, 100.0, 100.0));
   setUpperBorder(new Arc2D.Double(0.0, 0.0, 100.0, 100.0, 000.0, 180.0, Arc2D.OPEN));
   setLowerBorder(new Arc2D.Double(0.0, 0.0, 100.0, 100.0, 180.0, 180.0, Arc2D.OPEN));
   addComponentListener(new ResizeListener());
 }
 public JSwingButton(String label)
 {
   this(label, null, null, null, null, null);
 }
 public JSwingButton()
 {
   this("", null, null, null, null, null);
 }
 public void setRolloverHighlight(Paint rolloverHighlight)
 {
   Paint oldHighLight = this.rolloverHighlight;
   this.rolloverHighlight = rolloverHighlight;
   if(this.rolloverHighlight == null)
     this.rolloverHighlight = new Color(255, 255, 255, 64);
   firePropertyChange("rolloverHighlight", oldHighLight, this.rolloverHighlight);
 }
 public Paint getRolloverHighlight()
 {
   return rolloverHighlight;
 }
 public void setArmedHighlight(Paint armedHighlight)
 {
   Paint oldHighLight = this.armedHighlight;
   this.armedHighlight = armedHighlight;
   if(this.armedHighlight == null)
     this.armedHighlight = new Color(0, 0, 0, 64);
   firePropertyChange("armedHighlight", oldHighLight, this.armedHighlight);
 }
 public Paint getArmedHighlight()
 {
   return armedHighlight;
 }
 public Shape getShape()
 {
   return shape;
 }
 public void setShape(Shape shape)
 {
   if(shape != null && !shape.equals(this.shape))
   {
     Shape oldShape = this.shape;
     this.shape = shape;
     firePropertyChange("shape", oldShape, shape);
   }
 }
 protected void resizeShapes()
 {
   Dimension size = getSize(new Dimension());
   Rectangle shapeBounds = getBorderStroke().createStrokedShape(shape).getBounds();
   if(shapeBounds.x != 0 || shapeBounds.y != 0)
   {
     AffineTransform transform = AffineTransform.getTranslateInstance( -shapeBounds.x, -shapeBounds.y);
     shape = transform.createTransformedShape(shape);
     upperBorder = transform.createTransformedShape(upperBorder);
     lowerBorder = transform.createTransformedShape(lowerBorder);
   }
   if(shapeBounds.width != size.width || shapeBounds.height != size.height)
   {
     double sx = (double) size.width / (double) shapeBounds.width;
     double sy = (double) size.height / (double) shapeBounds.height;
     AffineTransform transform = AffineTransform.getScaleInstance(sx, sy);
     shape = transform.createTransformedShape(shape);
     upperBorder = transform.createTransformedShape(upperBorder);
     lowerBorder = transform.createTransformedShape(lowerBorder);
   }
 }
 public Shape getUpperBorder()
 {
   return upperBorder;
 }
 public void setUpperBorder(Shape upperBorder)
 {
   Shape oldUpperBorder = this.lowerBorder;
   this.upperBorder = upperBorder;
   firePropertyChange("upperBorder", oldUpperBorder, upperBorder);
 }
 public Shape getLowerBorder()
 {
   return lowerBorder;
 }
 public void setLowerBorder(Shape lowerBorder)
 {
   Shape oldLowerBorder = this.lowerBorder;
   this.lowerBorder = lowerBorder;
   firePropertyChange("lowerBorder", oldLowerBorder, lowerBorder);
 }
 public void setBorderHighlight(Paint borderHighlight)
 {
   Paint oldBorderHighlight = this.borderHighlight;
   this.borderHighlight = borderHighlight;
   if(this.borderHighlight == null)
     this.borderHighlight = UIManager.getColor("Button.light");
   firePropertyChange("borderHighlight", oldBorderHighlight, this.borderHighlight);
 }
 public Paint getBorderHighlight()
 {
   return borderHighlight;
 }
 public void setBorderShadow(Paint borderShadow)
 {
   Paint oldBorderShadow = this.borderShadow;
   this.borderShadow = borderShadow;
   if(this.borderShadow == null)
     this.borderShadow = UIManager.getColor("Button.shadow");
   firePropertyChange("borderShadow", oldBorderShadow, this.borderShadow);
 }
 public Paint getBorderShadow()
 {
   return borderShadow;
 }
 public Stroke getBorderStroke()
 {
   return borderStroke;
 }
 public void setBorderStroke(Stroke borderStroke)
 {
   Stroke oldBorderStroke = this.borderStroke;
   this.borderStroke = borderStroke;
   if(this.borderStroke == null)
     this.borderStroke = new BasicStroke();
   firePropertyChange("lowerBorder", oldBorderStroke, this.borderStroke);
 }
 protected void paintComponent(Graphics g)
 {
   Graphics2D g2 = (Graphics2D) g;
   if(getModel().isArmed())
   {
     g2.setPaint(getArmedHighlight());
     g2.fill(shape);
   }
   else if(getModel().isRollover())
   {
     g2.setPaint(getRolloverHighlight());
     g2.fill(shape);
   }
   super.paintComponent(g);
 }
 protected void paintBorder(Graphics g)
 {
   Graphics2D g2 = (Graphics2D) g;
   g2.setStroke(getBorderStroke());
   if(getModel().isRollover())
   {
     if(getUpperBorder() != null && getLowerBorder() != null)
     {
       g2.setPaint(getBorderHighlight());
       g2.draw(getUpperBorder());
       g2.setPaint(getBorderShadow());
       g2.draw(getLowerBorder());
     }
     else
     {
       g2.setPaint(getBorderShadow());
       g2.draw(getShape());
     }
   }
 }
 public boolean contains(int x, int y)
 {
   return shape.contains(x, y);
 }
 public static void main(String[] args)
 {
   try
   {
     UIManager.setLookAndFeel(UIManager.getInstalledLookAndFeels()[0].getClassName());
   }
   catch(Exception ex)
   {}
   JFrame frame = new JFrame();
   frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
   Container cont = frame.getContentPane();
   cont.setLayout(new GridLayout(1, 0));
   JSwingButton button = new JSwingButton("Button 1");
   cont.add(button);
   button = new JSwingButton("Button 2");
   Dimension d = new Dimension(250, 150);
   button.setPreferredSize(d);
   button.setShape(new RoundRectangle2D.Double(0, 0, d.width, d.height, 100, 100));
   button.setUpperBorder(null);
   button.setLowerBorder(null);
   button.setArmedHighlight(new GradientPaint(0, 0, Color.RED.darker(), d.width, d.height, Color.YELLOW.darker()));
   button.setRolloverHighlight(new GradientPaint(0, 0, Color.RED, d.width, d.height, Color.YELLOW));
   button.setBorderShadow(new GradientPaint(0, 0, Color.GREEN, d.width, d.height, Color.BLUE));
   //button.setBorderStroke(new BasicStroke(5.0f));
   button.setBorderStroke(new BasicStroke(4.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND, 1.0f, new float[] {30.0f, 10.0f, 10.0f, 10.0f}, 0.0f));
   cont.add(button);
   frame.pack();
   frame.setLocationRelativeTo(null);
   frame.show();
 }
 private class ResizeListener implements ComponentListener
 {
   public void componentResized(ComponentEvent e)
   {
     resizeShapes();
   }
   public void componentMoved(ComponentEvent e)
   {}
   public void componentShown(ComponentEvent e)
   {}
   public void componentHidden(ComponentEvent e)
   {}
 }
}

import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class RoundButton extends JButton 
{
    public RoundButton(String label) 
    {
        super(label);
        // These statements enlarge the button so that it 
        // becomes a circle rather than an oval.
        Dimension size = getPreferredSize();
        size.width = size.height = Math.max(size.width, size.height);
        setPreferredSize(size);
        // This call causes the JButton not to paint 
        // the background.
        // This allows us to paint a round background.
        setContentAreaFilled(false);
    }
    // Paint the round background and label.
    protected void paintComponent(Graphics g) 
    {
        if (getModel().isArmed()) {
            // You might want to make the highlight color 
            // a property of the RoundButton class.
            g.setColor(Color.lightGray);
        } 
        else {
            g.setColor(getBackground());
        }
        g.fillOval(0, 0, getSize().width-1, 
        getSize().height-1);
        // This call will paint the label and the 
        // focus rectangle.
        super.paintComponent(g);
    }
    // Paint the border of the button using a simple stroke.
    protected void paintBorder(Graphics g) 
    {
        g.setColor(getForeground());
        g.drawOval(0, 0, getSize().width-1, 
        getSize().height-1);
    }
    // Hit detection.
    Shape shape;
    public boolean contains(int x, int y) 
    {
        // If the button has changed size, 
        // make a new shape object.
        if (shape == null || !shape.getBounds().equals(getBounds())) {
            shape = new Ellipse2D.Float(0, 0, getWidth(), getHeight());
        }
        return shape.contains(x, y);
    }
    // Test routine.
    public static void main(String[] args) 
    {
        // Create a button with the label "Jackpot".
        JButton button = new RoundButton("Jackpot");
        button.setBackground(Color.green);
        // Create a frame in which to show the button.
        JFrame frame = new JFrame();
        frame.getContentPane().setBackground(Color.yellow);
        frame.getContentPane().add(button);
        frame.getContentPane().setLayout(new FlowLayout());
        frame.setSize(150, 150);
        frame.setVisible(true);
    }
}