Hello all.

Problem:

My program layout is fine, as below before I add JToolbar to BorderLayout.PAGE_START Here's a screenshot before JToolbar is added:

Here's how it looked like after adding JToolbar:

May I know what did I do wrong?

Here's the code I used:

    //Create the text pane and configure it.
    textPane = new JTextPane();
    -snipped code-
    JScrollPane scrollPane = new JScrollPane(textPane);
    scrollPane.setPreferredSize(new Dimension(300, 300));

    //Create the text area for the status log and configure it.
    changeLog = new JTextArea(5, 30);
    changeLog.setEditable(false);
    JScrollPane scrollPaneForLog = new JScrollPane(changeLog);

    //Create a split pane for the change log and the text area.
    JSplitPane splitPane = new JSplitPane(
            JSplitPane.VERTICAL_SPLIT,
            scrollPane, scrollPaneForLog);
    splitPane.setOneTouchExpandable(true);

    //Create the status area.
    JPanel statusPane = new JPanel(new GridLayout(1, 1));
    CaretListenerLabel caretListenerLabel =
            new CaretListenerLabel("Caret Status");
    statusPane.add(caretListenerLabel);

    //Create the toolbar
    JToolBar toolBar = new JToolBar();
    -snipped code-

    //Add the components.
    getContentPane().add(toolBar, BorderLayout.PAGE_START);
    getContentPane().add(splitPane, BorderLayout.CENTER);
    getContentPane().add(statusPane, BorderLayout.PAGE_END);

    //Set up the menu bar.
    actions = createActionTable(textPane);
    JMenu editMenu = createEditMenu();
    JMenu styleMenu = createStyleMenu();
    JMenuBar mb = new JMenuBar();
    mb.add(editMenu);
    mb.add(styleMenu);
    setJMenuBar(mb);

Please help, I'm new to GUI Building, and I don't feel like using Netbeans to drag and drop the UI for me... Thank you in advance.