ScrollBars not showing up for the JPanel [urgent]

Question

Hi,
I have a frame in which i have two nested split panes i.e one horizontal splitpane and in that i am having one more split pane on the right side and a JTree on the left side.In the second split pane (which is a vertical split) ,as a top component , i am setting a JScrollPane in which i am trying to display a JPanel which is having a lot of swing components in it.I want to see the scroll bars for this panel so that i can see all the components.Do i have to implement Scrollable interface for this panel to scroll in the ScrollPane.I don't know how to implement Scrollable interface.Can some body help me in resolving this?This is some what urgent.Any help will be highly appreciated.
Thanks in advance.
Ashok

Answer 1

Thank you all for your replies.I added the scroll bar policy.The scroll bars are showing up but the components inside the Panel are not moving.I want the components to move when i am scrolling.Here is my code.In the code SeriesDescPanel, SeriesDescMapPanel are sub classes of JPanel.I am using null layout to add the components to these panels.
public class MainWindow extends JFrame implements TreeExpansionListener
public MainWindow()
throws RemoteException
// This code is automatically generated by Visual Cafe when you add
          // components to the visual environment. It instantiates and initializes
          // the components. To modify the code, only use code syntax that matches
          // what Visual Cafe can generate, or Visual Cafe may be unable to back
          // parse your Java file into its visual environment.
          //{{INIT_CONTROLS
          setJMenuBar(menuBar);
          setTitle("Series Maintenance");
          getContentPane().setLayout(new BorderLayout(0,0));
          setSize(667,478);
          setVisible(false);
          JSplitPane1.setDividerSize(1);
          JSplitPane1.setOneTouchExpandable(true);
          getContentPane().add(BorderLayout.CENTER, JSplitPane1);
          seriesMenu.setText("Series");
          seriesMenu.setActionCommand("Series");
          menuBar.add(seriesMenu);
          newSeriesGroupMenuItem.setText("New Series Group");
          newSeriesGroupMenuItem.setActionCommand("New Series Group");
          seriesMenu.add(newSeriesGroupMenuItem);
          newSeriesMenuItem.setText("New Series");
          newSeriesMenuItem.setActionCommand("New Series");
          seriesMenu.add(newSeriesMenuItem);
          seriesMenu.add(JSeparator1);
          serachMenuItem.setText("Search");
          serachMenuItem.setActionCommand("Search");
          seriesMenu.add(serachMenuItem);
          seriesMenu.add(JSeparator2);
          saveMenuItem.setText("Save");
          saveMenuItem.setActionCommand("Save");
          seriesMenu.add(saveMenuItem);
          seriesMenu.add(JSeparator3);
          exitMenuItem.setText("Exit");
          exitMenuItem.setActionCommand("Exit");
          seriesMenu.add(exitMenuItem);
          adminMenu.setText("Administration");
          adminMenu.setActionCommand("Administration");
          menuBar.add(adminMenu);
          bulkLoadMenuItem.setText("Bulk Load");
          bulkLoadMenuItem.setActionCommand("Bulk Load");
          adminMenu.add(bulkLoadMenuItem);
          drsMenuItem.setText("DRS override");
          drsMenuItem.setActionCommand("DRS override");
          adminMenu.add(drsMenuItem);
          helpMenu.setText("Help");
          helpMenu.setActionCommand("Help");
          menuBar.add(helpMenu);
          tutorialMenuItem.setText("Tutorial");
          tutorialMenuItem.setActionCommand("Tutorial");
          helpMenu.add(tutorialMenuItem);
          bulkLoadFormatMenuItem.setText("Bulk Load Format");
          bulkLoadFormatMenuItem.setActionCommand("Bulk Load Format");
          helpMenu.add(bulkLoadFormatMenuItem);
          aboutMenuItem.setText("About");
          aboutMenuItem.setActionCommand("About");
          helpMenu.add(aboutMenuItem);
JSplitPane2 = new javax.swing.JSplitPane();
upperPanel = new SeriesDescPanel();
JScrollPane2 = new javax.swing.JScrollPane(upperPanel,
ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
JScrollPane3 = new javax.swing.JScrollPane();
JSplitPane2.setOrientation(0);
JSplitPane2.setDividerSize(1);
JSplitPane2.setOneTouchExpandable(true);
JSplitPane1.setRightComponent(JSplitPane2);
JSplitPane1.setLeftComponent(viewPane);
viewPane.add(alphabeticPane);
viewPane.add(searchDataPane);
viewPane.setTitleAt(0,"All");
          viewPane.setTitleAt(1,"search");
//JScrollPane1.setMinimumSize(new Dimension(126, 478));
JSplitPane2.setTopComponent(JScrollPane2);
//JScrollPane2.setMinimumSize(new Dimension(426, 409));
JSplitPane2.setBottomComponent(JScrollPane3);
lowerPanel = new SeriesDescMapPanel();
seriesTreeModel = new SeriesTreeModel(SeriesMaintenanceUI.getSeriesGroupInfo());
tickersTree.setModel(seriesTreeModel);
alphabeticPane.getViewport().setView(tickersTree);
//JScrollPane2.getViewport().setView(upperPanel);
//JScrollPane2.setViewportView(upperPanel);
//upperPanel.scrollRectToVisible(new Rectangle(upperPanel.getWidth(),
//upperPanel.getHeight(),1,1));
JScrollPane3.getViewport().setView(lowerPanel);
//JSplitPane2.setPreferredSize(new Dimension(426,200));
SeriesDescPanel upperPanel;
SeriesDescMapPanel lowerPanel;
SeriesTreeModel seriesTreeModel;
SeriesTreeModel searchTreeModel;
javax.swing.JSplitPane JSplitPane2;
javax.swing.JScrollPane JScrollPane2;
javax.swing.JScrollPane JScrollPane3;
javax.swing.JTree tickersTree = new javax.swing.JTree();
javax.swing.JTree searchTree = new javax.swing.JTree();
javax.swing.JScrollPane alphabeticPane = new javax.swing.JScrollPane();
javax.swing.JTabbedPane viewPane = new JTabbedPane(SwingConstants.BOTTOM);
javax.swing.JScrollPane searchDataPane = new javax.swing.JScrollPane();
//{{DECLARE_CONTROLS
     javax.swing.JSplitPane JSplitPane1 = new javax.swing.JSplitPane();
     javax.swing.JMenuBar menuBar = new javax.swing.JMenuBar();
     javax.swing.JMenu seriesMenu = new javax.swing.JMenu();
     javax.swing.JMenuItem newSeriesGroupMenuItem = new javax.swing.JMenuItem();
     javax.swing.JMenuItem newSeriesMenuItem = new javax.swing.JMenuItem();
     javax.swing.JSeparator JSeparator1 = new javax.swing.JSeparator();
     javax.swing.JMenuItem serachMenuItem = new javax.swing.JMenuItem();
     javax.swing.JSeparator JSeparator2 = new javax.swing.JSeparator();
     javax.swing.JMenuItem saveMenuItem = new javax.swing.JMenuItem();
     javax.swing.JSeparator JSeparator3 = new javax.swing.JSeparator();
     javax.swing.JMenuItem exitMenuItem = new javax.swing.JMenuItem();
     javax.swing.JMenu adminMenu = new javax.swing.JMenu();
     javax.swing.JMenuItem bulkLoadMenuItem = new javax.swing.JMenuItem();
     javax.swing.JMenuItem drsMenuItem = new javax.swing.JMenuItem();
     javax.swing.JMenu helpMenu = new javax.swing.JMenu();
     javax.swing.JMenuItem tutorialMenuItem = new javax.swing.JMenuItem();
     javax.swing.JMenuItem bulkLoadFormatMenuItem = new javax.swing.JMenuItem();
     javax.swing.JMenuItem aboutMenuItem = new javax.swing.JMenuItem();
Pl. help me in resolving this.
Ashok