Fredwurst

I've a little problem with the JScrollPanel. It does not appear. I tried a lot of configurations and possible solutions to see them, but nothing works. So, here is a little code fragment which describes my problem:
<font size=2.5> import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.util.*; public class TestFrame { public JButton button; public PicturePanel picturePanel; public JFrame jFrame = new JFrame(); public JScrollPane scrollPane; public JSplitPane jSplitpane; public JPanel panel = new JPanel(); public static void main(String[] args) { TestFrame frame = new TestFrame(); } public TestFrame() { jFrame.setSize(300,300); jFrame.setLocation(300,300); picturePanel = new PicturePanel(); picturePanel.setSize(1000,1000); scrollPane = new JScrollPane(picturePanel); button = new JButton(); button.setText("Step"); jSplitpane = new JSplitPane(JSplitPane.VERTICAL_SPLIT,button,scrollPane); jSplitpane.setContinuousLayout(true); jSplitpane.setPreferredSize(new Dimension(1000,1000)); jFrame.getContentPane().add(jSplitpane,BorderLayout.CENTER); jFrame.setVisible(true); button.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(ActionEvent e) { button_actionPerformed(e); } }); } void button_actionPerformed(ActionEvent e) { this.picturePanel.repaint(); } } class PicturePanel extends JPanel { private int x1 = 0; private int x2 = 0; private int y1 = 0; private int y2 = 0; private Random r = new Random(); private ArrayList arrayList = new ArrayList(); public void PicturePanel() { this.setBackground(Color.black); this.setSize(1000,1000); } public void paintComponent(Graphics g) { super.paintComponent(g); g.setColor(Color.white); paintLine(g); } public void paintLine(Graphics g) { ArrayList v = new ArrayList(); v = createNewData(); arrayList.add(v); for (int n=0;n<arrayList.size()-1;n++)> { v = (ArrayList) arrayList.get(n); x1 = ((Integer) v.get(0)).intValue(); y1 = ((Integer) v.get(1)).intValue(); x2 = ((Integer) v.get(2)).intValue(); y2 = ((Integer) v.get(3)).intValue(); g.drawLine(x1,y1,x2,y2); } } public ArrayList createNewData() { ArrayList v = new ArrayList(); for (int n=0;n<4;n++){ Integer a = new Integer((int)(r.nextInt(1000))); v.add(a); } return v; } }

Thanks for help ...
Fredwurst
(edited by Cindy to get the font big enough to READ)

[This message has been edited by Cindy Glass (edited September 03, 2001).]