如何检测Java Swing滚动条何时位于或接近底部？

import javax.swing.*;
import java.awt.*;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;

public class ScrollBarDemo extends JFrame {
    private JScrollBar scrollBar;

    public ScrollBarDemo() {
        setTitle("Scroll Bar Demo");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setPreferredSize(new Dimension(300, 200));

        // 创建滚动条
        scrollBar = new JScrollBar(JScrollBar.VERTICAL, 0, 10, 0, 100);
        scrollBar.addAdjustmentListener(new ScrollBarListener());

        // 将滚动条添加到容器中
        getContentPane().add(scrollBar, BorderLayout.EAST);

        pack();
        setVisible(true);
    }

    private class ScrollBarListener implements AdjustmentListener {
        @Override
        public void adjustmentValueChanged(AdjustmentEvent e) {
            int currentValue = scrollBar.getValue();
            int maxValue = scrollBar.getMaximum();
            int visibleHeight = getContentPane().getVisibleRect().height;

            if (currentValue >= maxValue - visibleHeight) {
                System.out.println("滚动条位于或接近底部");
            } else {
                System.out.println("滚动条不在底部");
            }
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(ScrollBarDemo::new);
    }
}