如何在jscrollpane窗格中添加jtable？

JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(x, y, width, height);

DefaultTableModel model = new DefaultTableModel(data, columnNames);
JTable table = new JTable(model);

scrollPane.setViewportView(table);

frame.add(scrollPane);

import javax.swing.*;
import javax.swing.table.DefaultTableModel;

public class MainFrame extends JFrame {
    public MainFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(500, 400);
        setLocationRelativeTo(null);

        // 创建JScrollPane对象
        JScrollPane scrollPane = new JScrollPane();
        scrollPane.setBounds(10, 10, 480, 380);

        // 创建JTable对象
        Object[][] data = {
                {"John", "Doe", 30},
                {"Jane", "Smith", 25},
                {"Bob", "Johnson", 35}
        };
        String[] columnNames = {"First Name", "Last Name", "Age"};
        DefaultTableModel model = new DefaultTableModel(data, columnNames);
        JTable table = new JTable(model);

        // 将JTable对象添加到JScrollPane中
        scrollPane.setViewportView(table);

        // 将JScrollPane添加到容器中
        add(scrollPane);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            MainFrame frame = new MainFrame();
            frame.setVisible(true);
        });
    }
}