动态添加新的JComponent以响应按钮按下

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class DynamicComponentExample extends JFrame {
    private JPanel container;
    private JButton addButton;
    private int componentCount;

    public DynamicComponentExample() {
        setTitle("Dynamic Component Example");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        container = new JPanel();
        container.setLayout(new BoxLayout(container, BoxLayout.Y_AXIS));
        add(new JScrollPane(container), BorderLayout.CENTER);

        addButton = new JButton("Add Component");
        addButton.addActionListener(new ButtonListener());
        add(addButton, BorderLayout.SOUTH);

        pack();
        setLocationRelativeTo(null);
        setVisible(true);
    }

    private class ButtonListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            // 创建新的JComponent对象
            JLabel newComponent = new JLabel("Component " + (++componentCount));

            // 设置新组件的属性和布局
            newComponent.setAlignmentX(Component.CENTER_ALIGNMENT);

            // 将新组件添加到容器中
            container.add(newComponent);

            // 刷新界面
            container.revalidate();
            container.repaint();
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new DynamicComponentExample();
            }
        });
    }
}