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Add ControlListener to control

import org.eclipse.swt.SWT; import org.eclipse.swt.events.ControlEvent; import org.eclipse.swt.events.ControlListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class ControlListenerAdd {   static int count = 0;   public static void main(String[] args) {     Display display = new Display();     final Shell shell = new Shell(display);     shell.setLayout(new RowLayout());     final Composite composite = new Composite(shell, SWT.BORDER);     composite.setLayout(new RowLayout());     composite.setBackground(display.getSystemColor(SWT.COLOR_YELLOW));     composite.addControlListener(new ControlListener() {       public void controlMoved(ControlEvent e) {       }       public void controlResized(ControlEvent e) {         System.out.println("Composite resize.");       }     });              Button buttonAdd = new Button(shell, SWT.PUSH);     buttonAdd.setText("Add new button");     buttonAdd.addSelectionListener(new SelectionAdapter() {       public void widgetSelected(SelectionEvent e) {         Button button = new Button(composite, SWT.PUSH);         button.setText("Button #" + (count++));         composite.layout(true);         composite.pack();       }     });     shell.setSize(450, 100);     shell.open();     while (!shell.isDisposed()) {       if (!display.readAndDispatch()) {         display.sleep();       }     }     display.dispose();   } }