JTree problem (inside JSplitpane)

Question

Hello All,
I am trying to place a Jtree inside left side of jsplitpane. But it didn't appear in it and no error or exception thrown. For testing, i placed some other component like a panel inside that left pane of splitpane and it worked fine. For further testing, when I placed my jtree's panel in applet (to test whether it has something wrong with splitpane or some other thing), it didn't appear in it too. Below is the code to illustrate what I do for my last try (in applet):
public class TRDB extends JApplet {
     public void init() {
          p("init() called");
     public void start() {
          p("start() called");
          //MainWindow mw = new MainWindow();
          //mw.setSize(400,450);
          //mw.setVisible(true);
          TreeViewPane mcp = new TreeViewPane();
          getContentPane().setLayout(null);
          getContentPane().add(mcp);
          mcp.setBounds(0,0,100,300);
          mcp.setBackground(Color.blue);
          p("start() finish!!!!!");
     private void p(String str) {
          System.out.println(str);
// TreeViewPane class
public class TreeViewPane extends JPanel {
     JTree tree;
     DefaultMutableTreeNode top;
     public TreeViewPane() {
          top = new DefaultMutableTreeNode("GDAMS");
         createNodes(top);
         tree = new JTree(top);
          tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
         //setOpaque(true);      //content panes must be opaque
     private void createNodes(DefaultMutableTreeNode top) {
         DefaultMutableTreeNode category = null;
         DefaultMutableTreeNode book = null;
         category = new DefaultMutableTreeNode("Books for Java Programmers");
         top.add(category);
         //...add more books for programmers...
         category = new DefaultMutableTreeNode("Books for Java Implementers");
         top.add(category);
}Please have a look at see if something is wrong. I just saw a blue rectangular box (depicting my jtree panel) on applet without any table in it.
Plz HELP!!

Answer 1

I must take some coffee or strong cup of tea. i m exhaust, really. Yah i got it what i did wrong. sorry !!