将JInternalFrame添加到包含JScrollPane的JTabbedPane中包含具有Gridbag布局的JPanel

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

public class MainFrame extends JFrame {
    public MainFrame() {
        // 创建JInternalFrame对象
        JInternalFrame internalFrame = new JInternalFrame("Internal Frame", true, true, true, true);
        internalFrame.setSize(300, 200);
        internalFrame.setVisible(true);

        // 创建JPanel对象，并设置Gridbag布局
        JPanel panel = new JPanel(new GridBagLayout());

        // 添加组件到JPanel中
        GridBagConstraints constraints = new GridBagConstraints();
        constraints.gridx = 0;
        constraints.gridy = 0;
        panel.add(new JLabel("Label 1"), constraints);

        constraints.gridx = 1;
        constraints.gridy = 0;
        panel.add(new JTextField(10), constraints);

        // 创建JScrollPane对象，并将JPanel添加到其中
        JScrollPane scrollPane = new JScrollPane(panel);

        // 创建JTabbedPane对象，并将JScrollPane添加为选项卡的内容
        JTabbedPane tabbedPane = new JTabbedPane();
        tabbedPane.addTab("Tab 1", scrollPane);

        // 将JInternalFrame添加到JTabbedPane中的选项卡中
        tabbedPane.add(internalFrame);

        // 将JTabbedPane添加到主窗口中
        add(tabbedPane);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(400, 300);
        setVisible(true);
    }

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