如何使用JTextField在JTextField本身上使用ActionListener显示否定或肯定的结果

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

JFrame frame = new JFrame("JTextField示例");
JTextField textField = new JTextField(20);

ActionListener actionListener = new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {
        String text = textField.getText();
        if (text.equals("肯定")) {
            JOptionPane.showMessageDialog(frame, "您选择了肯定！");
        } else if (text.equals("否定")) {
            JOptionPane.showMessageDialog(frame, "您选择了否定！");
        } else {
            JOptionPane.showMessageDialog(frame, "请输入有效的选项！");
        }
    }
};

textField.addActionListener(actionListener);

frame.getContentPane().add(textField);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);