利用java编写一个计算机窗口，计算机可以计算加减乘除，pow、sqrt、log10

好的，以下是一个简单的 Java 计算器窗口，可以进行加减乘除、pow、sqrt、log10 的计算：

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

public class Calculator extends JFrame implements ActionListener {
    private JTextField textField;
    private double num1, num2, result;
    private int operator;
    private boolean isFirstNum = true;

    public Calculator() {
        super("Calculator");
        setLayout(new BorderLayout());
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 200);

        // 文本框
        textField = new JTextField(10);
        textField.setEditable(false);
        add(textField, BorderLayout.NORTH);

        // 操作按钮
        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(4, 4));

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        JButton buttonLog10 = new JButton("log10");
        buttonLog10.addActionListener(this);
        panel.add(buttonLog10);

        add(panel, BorderLayout.CENTER);

        setVisible(true);
    }

    public void actionPerformed(ActionEvent event) {
        String command = event.getActionCommand();
        if (command.equals("+")) {
            operator = 1;
            num1 = Double.parseDouble(textField.getText());
            isFirstNum = false;
            textField.setText("");
        } else if (command.equals("-")) {
            operator = 2;
            num1 = Double.parseDouble(textField.getText());
            isFirstNum = false;
            textField.setText("");
        } else if (command.equals("*")) {
            operator = 3;
            num1 = Double.parseDouble(textField.getText());
            isFirstNum = false;
            textField.setText("");
        } else if (command.equals("/")) {
            operator = 4;
            num1 = Double.parseDouble(textField.getText());
            isFirstNum = false;
            textField.setText("");
        } else if (command.equals("pow")) {
            operator = 5;
            num1 = Double.parseDouble(textField.getText());
            isFirstNum = false;
            textField.setText("");
        } else if (command.equals("sqrt")) {
            operator = 6;
            num1 = Double.parseDouble(textField.getText());
            result = Math.sqrt(num1);
            textField.setText(Double.toString(result));
        } else if (command.equals("log10")) {
            operator = 7;
            num1 = Double.parseDouble(textField.getText());
            result = Math.log10(num1);
            textField.setText(Double.toString(result));
        } else if (command.equals("=")) {
            if (isFirstNum) {
                return;
            }
            num2 = Double.parseDouble(textField.getText());
            switch (operator) {
                case 1:
                    result = num1 + num2;
                    break;
                case 2:
                    result = num1 - num2;
                    break;
                case 3:
                    result = num1 * num2;
                    break;
                case 4:
                    result = num1 / num2;
                    break;
                case 5:
                    result = Math.pow(num1, num2);
                    break;
            }
            textField.setText(Double.toString(result));
            isFirstNum = true;
        } else {
            textField.setText(textField.getText() + command);
        }
    }

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

这个计算器窗口包含一个文本框和一些按钮。当你点击数字按钮时，数字将显示在文本框中。当你点击操作符按钮时，计算器将保存第一个数字并清空文本框，等待输入第二个数字。当你点击等于号时，计算器将执行相应的操作并将结果显示在文本框中。