java -将两个文本框值相加，并在标签中自动显示总和

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

public class Calculator extends JFrame {
    private JTextField textField1;
    private JTextField textField2;
    private JLabel resultLabel;

    public Calculator() {
        setTitle("Calculator");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 200);
        setLocationRelativeTo(null);

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(3, 2));

        JLabel label1 = new JLabel("Value 1:");
        textField1 = new JTextField();
        JLabel label2 = new JLabel("Value 2:");
        textField2 = new JTextField();
        JButton addButton = new JButton("Add");
        resultLabel = new JLabel();

        addButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                    int value1 = Integer.parseInt(textField1.getText());
                    int value2 = Integer.parseInt(textField2.getText());
                    int sum = value1 + value2;
                    resultLabel.setText("Sum: " + sum);
                } catch (NumberFormatException ex) {
                    resultLabel.setText("Invalid input");
                }
            }
        });

        panel.add(label1);
        panel.add(textField1);
        panel.add(label2);
        panel.add(textField2);
        panel.add(addButton);
        panel.add(resultLabel);

        add(panel);
        setVisible(true);
    }

    public static void main(String[] args) {
        new Calculator();
    }
}