使用java和html写一个华丽的计算器

好的，我可以给你提供一个简单的计算器的示例代码，使用Java和HTML编写。

Java代码：

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

public class Calculator extends JFrame implements ActionListener {
    private JButton button0, button1, button2, button3, button4, button5, button6, button7, button8, button9, buttonAdd, buttonSub, buttonMul, buttonDiv, buttonClear, buttonEqual;
    private JTextField textField;
    private String operator;
    private double num1, num2, result;

    public Calculator() {
        setTitle("Calculator");
        setSize(300, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        textField = new JTextField();
        add(textField, BorderLayout.NORTH);

        JPanel panel = new JPanel(new GridLayout(4, 4));

        button7 = new JButton("7");
        button7.addActionListener(this);
        panel.add(button7);

        button8 = new JButton("8");
        button8.addActionListener(this);
        panel.add(button8);

        button9 = new JButton("9");
        button9.addActionListener(this);
        panel.add(button9);

        buttonDiv = new JButton("/");
        buttonDiv.addActionListener(this);
        panel.add(buttonDiv);

        button4 = new JButton("4");
        button4.addActionListener(this);
        panel.add(button4);

        button5 = new JButton("5");
        button5.addActionListener(this);
        panel.add(button5);

        button6 = new JButton("6");
        button6.addActionListener(this);
        panel.add(button6);

        buttonMul = new JButton("*");
        buttonMul.addActionListener(this);
        panel.add(buttonMul);

        button1 = new JButton("1");
        button1.addActionListener(this);
        panel.add(button1);

        button2 = new JButton("2");
        button2.addActionListener(this);
        panel.add(button2);

        button3 = new JButton("3");
        button3.addActionListener(this);
        panel.add(button3);

        buttonSub = new JButton("-");
        buttonSub.addActionListener(this);
        panel.add(buttonSub);

        button0 = new JButton("0");
        button0.addActionListener(this);
        panel.add(button0);

        buttonClear = new JButton("C");
        buttonClear.addActionListener(this);
        panel.add(buttonClear);

        buttonEqual = new JButton("=");
        buttonEqual.addActionListener(this);
        panel.add(buttonEqual);

        buttonAdd = new JButton("+");
        buttonAdd.addActionListener(this);
        panel.add(buttonAdd);

        add(panel, BorderLayout.CENTER);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == button0) {
            textField.setText(textField.getText() + "0");
        } else if (e.getSource() == button1) {
            textField.setText(textField.getText() + "1");
        } else if (e.getSource() == button2) {
            textField.setText(textField.getText() + "2");
        } else if (e.getSource() == button3) {
            textField.setText(textField.getText() + "3");
        } else if (e.getSource() == button4) {
            textField.setText(textField.getText() + "4");
        } else if (e.getSource() == button5) {
            textField.setText(textField.getText() + "5");
        } else if (e.getSource() == button6) {
            textField.setText(textField.getText() + "6");
        } else if (e.getSource() == button7) {
            textField.setText(textField.getText() + "7");
        } else if (e.getSource() == button8) {
            textField.setText(textField.getText() + "8");
        } else if (e.getSource() == button9) {
            textField.setText(textField.getText() + "9");
        } else if (e.getSource() == buttonAdd) {
            operator = "+";
            num1 = Double.parseDouble(textField.getText());
            textField.setText("");
        } else if (e.getSource() == buttonSub) {
            operator = "-";
            num1 = Double.parseDouble(textField.getText());
            textField.setText("");
        } else if (e.getSource() == buttonMul) {
            operator = "*";
            num1 = Double.parseDouble(textField.getText());
            textField.setText("");
        } else if (e.getSource() == buttonDiv) {
            operator = "/";
            num1 = Double.parseDouble(textField.getText());
            textField.setText("");
        } else if (e.getSource() == buttonClear) {
            textField.setText("");
        } else if (e.getSource() == buttonEqual) {
            num2 = Double.parseDouble(textField.getText());
            if (operator == "+") {
                result = num1 + num2;
            } else if (operator == "-") {
                result = num1 - num2;
            } else if (operator == "*") {
                result = num1 * num2;
            } else if (operator == "/") {
                result = num1 / num2;
            }
            textField.setText(Double.toString(result));
        }
    }

    public static void main(String[] args) {
        Calculator calculator = new Calculator();
        calculator.setVisible(true);
    }
}

HTML代码：

<!DOCTYPE html>
<html>
  <head>
    <title>Calculator</title>
  </head>
  <body>
    <applet code="Calculator.class" width="300" height="300"></applet>
  </body>
</html>

将Java代码保存为Calculator.java，然后使用命令行编译和运行：

编译：javac Calculator.java

运行：appletviewer Calculator.html

这样就可以在浏览器中看到一个简单的计算器了。