用JAVA编写一个程序，按“产生”按钮，产生两个随机数并分别显示在“数字一”和“数字二”对应的文本框内，按“计算”按钮，计算产生的这两个随机数之和，并显示在“结果”对应的文本框内。 本题请编写三个程序，事件处理程序分别采用以下三种方式：1）内部类 2） 事件源所在类直接实现接口 3）匿名类 实现上述功能要求。

以下是三种不同方式的代码实现：

1）内部类

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

public class RandomSumWithInnerClass extends JFrame {
    private JTextField num1Field;
    private JTextField num2Field;
    private JTextField resultField;

    public RandomSumWithInnerClass() {
        super("随机数求和");

        // 创建GUI界面
        JLabel num1Label = new JLabel("数字一：");
        num1Field = new JTextField(10);
        num1Field.setEditable(false);

        JLabel num2Label = new JLabel("数字二：");
        num2Field = new JTextField(10);
        num2Field.setEditable(false);

        JLabel resultLabel = new JLabel("结果：");
        resultField = new JTextField(10);
        resultField.setEditable(false);

        JButton generateButton = new JButton("产生");
        generateButton.addActionListener(new GenerateButtonListener());

        JButton calculateButton = new JButton("计算");
        calculateButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int num1 = Integer.parseInt(num1Field.getText());
                int num2 = Integer.parseInt(num2Field.getText());
                int result = num1 + num2;
                resultField.setText(String.valueOf(result));
            }
        });

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(4, 2));
        panel.add(num1Label);
        panel.add(num1Field);
        panel.add(num2Label);
        panel.add(num2Field);
        panel.add(resultLabel);
        panel.add(resultField);
        panel.add(generateButton);
        panel.add(calculateButton);

        add(panel);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 200);
        setVisible(true);
    }

    // 内部类实现按钮监听器
    private class GenerateButtonListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            int num1 = (int) (Math.random() * 100);
            int num2 = (int) (Math.random() * 100);
            num1Field.setText(String.valueOf(num1));
            num2Field.setText(String.valueOf(num2));
            resultField.setText("");
        }
    }

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

2）事件源所在类直接实现接口

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

public class RandomSumWithInterface implements ActionListener {
    private JTextField num1Field;
    private JTextField num2Field;
    private JTextField resultField;

    public RandomSumWithInterface() {
        JFrame frame = new JFrame("随机数求和");

        // 创建GUI界面
        JLabel num1Label = new JLabel("数字一：");
        num1Field = new JTextField(10);
        num1Field.setEditable(false);

        JLabel num2Label = new JLabel("数字二：");
        num2Field = new JTextField(10);
        num2Field.setEditable(false);

        JLabel resultLabel = new JLabel("结果：");
        resultField = new JTextField(10);
        resultField.setEditable(false);

        JButton generateButton = new JButton("产生");
        generateButton.addActionListener(this);

        JButton calculateButton = new JButton("计算");
        calculateButton.addActionListener(this);

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(4, 2));
        panel.add(num1Label);
        panel.add(num1Field);
        panel.add(num2Label);
        panel.add(num2Field);
        panel.add(resultLabel);
        panel.add(resultField);
        panel.add(generateButton);
        panel.add(calculateButton);

        frame.add(panel);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);
        frame.setVisible(true);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        String command = e.getActionCommand();
        if (command.equals("产生")) {
            int num1 = (int) (Math.random() * 100);
            int num2 = (int) (Math.random() * 100);
            num1Field.setText(String.valueOf(num1));
            num2Field.setText(String.valueOf(num2));
            resultField.setText("");
        } else if (command.equals("计算")) {
            int num1 = Integer.parseInt(num1Field.getText());
            int num2 = Integer.parseInt(num2Field.getText());
            int result = num1 + num2;
            resultField.setText(String.valueOf(result));
        }
    }

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

3）匿名类

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

public class RandomSumWithAnonymousClass extends JFrame {
    private JTextField num1Field;
    private JTextField num2Field;
    private JTextField resultField;

    public RandomSumWithAnonymousClass() {
        super("随机数求和");

        // 创建GUI界面
        JLabel num1Label = new JLabel("数字一：");
        num1Field = new JTextField(10);
        num1Field.setEditable(false);

        JLabel num2Label = new JLabel("数字二：");
        num2Field = new JTextField(10);
        num2Field.setEditable(false);

        JLabel resultLabel = new JLabel("结果：");
        resultField = new JTextField(10);
        resultField.setEditable(false);

        JButton generateButton = new JButton("产生");
        generateButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int num1 = (int) (Math.random() * 100);
                int num2 = (int) (Math.random() * 100);
                num1Field.setText(String.valueOf(num1));
                num2Field.setText(String.valueOf(num2));
                resultField.setText("");
            }
        });

        JButton calculateButton = new JButton("计算");
        calculateButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int num1 = Integer.parseInt(num1Field.getText());
                int num2 = Integer.parseInt(num2Field.getText());
                int result = num1 + num2;
                resultField.setText(String.valueOf(result));
            }
        });

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(4, 2));
        panel.add(num1Label);
        panel.add(num1Field);
        panel.add(num2Label);
        panel.add(num2Field);
        panel.add(resultLabel);
        panel.add(resultField);
        panel.add(generateButton);
        panel.add(calculateButton);

        add(panel);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 200);
        setVisible(true);
    }

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