从JFrame中动态创建的变量中获取数据

import javax.swing.*;
import java.awt.*;
import java.lang.reflect.Field;

public class DynamicVariableExample extends JFrame {
    private JTextField textField;
    private JComboBox<String> comboBox;

    public DynamicVariableExample() {
        // 创建文本框和下拉列表
        textField = new JTextField();
        comboBox = new JComboBox<>(new String[]{"Option 1", "Option 2", "Option 3"});

        // 设置布局
        setLayout(new FlowLayout());

        // 添加组件到窗口
        add(textField);
        add(comboBox);

        // 设置窗口属性
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 200);
        setVisible(true);
    }

    public static void main(String[] args) {
        DynamicVariableExample example = new DynamicVariableExample();

        // 获取数据
        String text = example.getTextFieldData();
        String selectedOption = example.getComboBoxData();

        // 打印数据
        System.out.println("Text field data: " + text);
        System.out.println("Combo box data: " + selectedOption);
    }

    // 获取文本框中的数据
    public String getTextFieldData() {
        try {
            Field field = getClass().getDeclaredField("textField");
            field.setAccessible(true);
            JTextField textField = (JTextField) field.get(this);
            return textField.getText();
        } catch (NoSuchFieldException | IllegalAccessException e) {
            e.printStackTrace();
        }
        return null;
    }

    // 获取下拉列表中选中的数据
    public String getComboBoxData() {
        try {
            Field field = getClass().getDeclaredField("comboBox");
            field.setAccessible(true);
            JComboBox<String> comboBox = (JComboBox<String>) field.get(this);
            return (String) comboBox.getSelectedItem();
        } catch (NoSuchFieldException | IllegalAccessException e) {
            e.printStackTrace();
        }
        return null;
    }
}