单击JButton后在特定位置弹出JTextField

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

public class MainFrame extends JFrame {
    private JButton button;

    public MainFrame() {
        // 创建主窗口
        setTitle("JButton Demo");
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new FlowLayout());

        // 创建按钮
        button = new JButton("Click me");
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // 创建文本框
                JTextField textField = new JTextField();
                textField.setBounds(100, 100, 200, 30);
                add(textField);
                validate(); // 刷新窗口
            }
        });

        // 将按钮添加到主窗口
        add(button);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                MainFrame frame = new MainFrame();
                frame.setVisible(true);
            }
        });
    }
}