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Add selection listener to Combo

import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class ComboSelectionListener {   public static void main(String[] args) {     Display display = new Display();     Shell shell = new Shell(display);     shell.setLayout(new RowLayout());     Combo combo = new Combo(shell, SWT.NONE);     combo.setItems(new String[] { "Press enter to select", "B-1", "C-1" });     combo.addSelectionListener(new SelectionAdapter() {       public void widgetDefaultSelected(SelectionEvent e) {         System.out.println("Combo");       }     });     shell.pack();     shell.open();     while (!shell.isDisposed()) {       if (!display.readAndDispatch())         display.sleep();     }     display.dispose();   } }