import javax.swing.*;
import java.awt.*;
import java.awt.event.InputEvent;
import java.lang.reflect.InvocationTargetException;

/**
 * ScrollbarCrash.
 *
 * @author Hendrik Schreiber
 */
public class ScrollbarCrash extends JFrame {

    private final JScrollBar horizontalScrollBar;
    private final JScrollBar verticalScrollBar;

    public ScrollbarCrash() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        getContentPane().setLayout(new BorderLayout());
        final JTable table = new JTable();
        final JScrollPane scrollPane = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        horizontalScrollBar = scrollPane.getHorizontalScrollBar();
        verticalScrollBar = scrollPane.getVerticalScrollBar();
        getContentPane().add(scrollPane, BorderLayout.CENTER);
        setBounds(100, 100, 300, 300);
    }

    public static void main(String[] args) throws AWTException, InvocationTargetException, InterruptedException {
        final ScrollbarCrash frame = new ScrollbarCrash();
        SwingUtilities.invokeLater(() -> frame.setVisible(true));
        final Robot robot = new Robot();
        robot.setAutoDelay(500);
        robot.setAutoWaitForIdle(true);
        robot.delay(1000);

        clickOnScrollBar(robot, frame.horizontalScrollBar);
        clickOnScrollBar(robot, frame.verticalScrollBar);

        SwingUtilities.invokeAndWait(frame::dispose);
    }

    private static void clickOnScrollBar(final Robot robot, final JScrollBar scrollBar) {
        final Point p = new Point(scrollBar.getWidth()/2, scrollBar.getHeight()/2);
        SwingUtilities.convertPointToScreen(p, scrollBar);
        robot.mouseMove(p.x, p.y);
        robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
        robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
    }
}