重新绘制JScrollPane中的JPanel

import javax.swing.*;
import java.awt.*;

public class JScrollPaneExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("JScrollPane Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 300);

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(10, 1));
        panel.setPreferredSize(new Dimension(200, 200));

        for (int i = 0; i < 10; i++) {
            JLabel label = new JLabel("Label " + (i + 1));
            panel.add(label);
        }

        JScrollPane scrollPane = new JScrollPane(panel);
        frame.add(scrollPane);

        frame.setVisible(true);
    }
}