Use a JSplitPane bean to provide a split view for other components. You can place one component on each pane. If you want multiple components within a pane, add a JPanel bean to the pane and place the components on the panel.
You should not use a JSplitPane bean with AWT components. Although Swing and AWT beans can be mixed, it is inadvisable.
Adding a Pane or Panel
Pane and Panel Beans
Beans for Visual Composition