import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class DrawLine {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.open();
GC gc = new GC(shell);
gc.drawLine(0, 0, 19, 19);
gc.drawLine(19, 0, 0, 19);
gc.dispose();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}