import org.eclipse.swt.SWT; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Label; public class CompositeDemo { public static void main(String[] args) { Display display = new Display(); Shell shell = new Shell(display); shell.setLayout(new FillLayout()); Composite composite = new Composite(shell, SWT.BORDER); composite.setLayout(new FillLayout()); Label label = new Label(composite, SWT.NONE); label.setText("This is a composite widget"); shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } display.dispose(); } }In the above code example, we use the Composite pack to create a simple composite widget that contains a label. The code creates a new composite widget, sets its layout to a FillLayout, creates a label widget inside the composite widget, and sets the text on the label. Finally, the shell is packed and opened, and the program enters a loop that keeps it open until the shell is closed. Overall, the Composite pack is used to create complex UIs that require grouping and organization of widgets in a container. It is part of the Eclipse SWT library.