import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Test {
public static void main(String [] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Hello Darwin World");
    shell.setLayout(new FillLayout());
    Button button = new Button(shell, SWT.NONE);
    button.setText("A GTK+ Button");
    FileDialog dialog = new FileDialog(shell, SWT.OPEN);
    dialog.setText("A GTK+ File Dialog");
    shell.setSize(320, 240);
    shell.open();
    dialog.open();
    while(!shell.isDisposed()) {
        if(!display.readAndDispatch()) {
            display.sleep();
        }
    }
    display.dispose();
}
}