用java设计一个计算器窗口

好的，以下是一个简单的Java计算器窗口设计示例：

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

public class CalculatorGUI extends JFrame implements ActionListener {
    private JTextField display;
    private JButton button0, button1, button2, button3, button4, button5, button6, button7, button8, button9;
    private JButton buttonAdd, buttonSubtract, buttonMultiply, buttonDivide, buttonEquals, buttonClear;
    private double num1 = 0.0, num2 = 0.0;
    private char operator = ' ';

    public CalculatorGUI() {
        super("Calculator");

        // 创建显示框
        display = new JTextField(20);
        display.setHorizontalAlignment(JTextField.RIGHT);
        display.setEditable(false);

        // 创建数字按钮
        button0 = new JButton("0");
        button1 = new JButton("1");
        button2 = new JButton("2");
        button3 = new JButton("3");
        button4 = new JButton("4");
        button5 = new JButton("5");
        button6 = new JButton("6");
        button7 = new JButton("7");
        button8 = new JButton("8");
        button9 = new JButton("9");

        // 创建运算符按钮
        buttonAdd = new JButton("+");
        buttonSubtract = new JButton("-");
        buttonMultiply = new JButton("*");
        buttonDivide = new JButton("/");
        buttonEquals = new JButton("=");
        buttonClear = new JButton("C");

        // 设置布局和添加组件
        setLayout(new BorderLayout());
        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new GridLayout(4, 4));
        buttonPanel.add(button7);
        buttonPanel.add(button8);
        buttonPanel.add(button9);
        buttonPanel.add(buttonAdd);
        buttonPanel.add(button4);
        buttonPanel.add(button5);
        buttonPanel.add(button6);
        buttonPanel.add(buttonSubtract);
        buttonPanel.add(button1);
        buttonPanel.add(button2);
        buttonPanel.add(button3);
        buttonPanel.add(buttonMultiply);
        buttonPanel.add(buttonClear);
        buttonPanel.add(button0);
        buttonPanel.add(buttonEquals);
        buttonPanel.add(buttonDivide);
        add(display, BorderLayout.NORTH);
        add(buttonPanel, BorderLayout.CENTER);

        // 为按钮添加监听器
        button0.addActionListener(this);
        button1.addActionListener(this);
        button2.addActionListener(this);
        button3.addActionListener(this);
        button4.addActionListener(this);
        button5.addActionListener(this);
        button6.addActionListener(this);
        button7.addActionListener(this);
        button8.addActionListener(this);
        button9.addActionListener(this);
        buttonAdd.addActionListener(this);
        buttonSubtract.addActionListener(this);
        buttonMultiply.addActionListener(this);
        buttonDivide.addActionListener(this);
        buttonEquals.addActionListener(this);
        buttonClear.addActionListener(this);
    }

    // 实现ActionListener接口中的方法
    public void actionPerformed(ActionEvent event) {
        if (event.getSource() == button0) {
            display.setText(display.getText() + "0");
        } else if (event.getSource() == button1) {
            display.setText(display.getText() + "1");
        } else if (event.getSource() == button2) {
            display.setText(display.getText() + "2");
        } else if (event.getSource() == button3) {
            display.setText(display.getText() + "3");
        } else if (event.getSource() == button4) {
            display.setText(display.getText() + "4");
        } else if (event.getSource() == button5) {
            display.setText(display.getText() + "5");
        } else if (event.getSource() == button6) {
            display.setText(display.getText() + "6");
        } else if (event.getSource() == button7) {
            display.setText(display.getText() + "7");
        } else if (event.getSource() == button8) {
            display.setText(display.getText() + "8");
        } else if (event.getSource() == button9) {
            display.setText(display.getText() + "9");
        } else if (event.getSource() == buttonAdd) {
            num1 = Double.parseDouble(display.getText());
            operator = '+';
            display.setText("");
        } else if (event.getSource() == buttonSubtract) {
            num1 = Double.parseDouble(display.getText());
            operator = '-';
            display.setText("");
        } else if (event.getSource() == buttonMultiply) {
            num1 = Double.parseDouble(display.getText());
            operator = '*';
            display.setText("");
        } else if (event.getSource() == buttonDivide) {
            num1 = Double.parseDouble(display.getText());
            operator = '/';
            display.setText("");
        } else if (event.getSource() == buttonEquals) {
            num2 = Double.parseDouble(display.getText());
            switch (operator) {
                case '+':
                    display.setText(Double.toString(num1 + num2));
                    break;
                case '-':
                    display.setText(Double.toString(num1 - num2));
                    break;
                case '*':
                    display.setText(Double.toString(num1 * num2));
                    break;
                case '/':
                    display.setText(Double.toString(num1 / num2));
                    break;
            }
        } else if (event.getSource() == buttonClear) {
            display.setText("");
            num1 = 0.0;
            num2 = 0.0;
            operator = ' ';
        }
    }

    public static void main(String[] args) {
        CalculatorGUI calculator = new CalculatorGUI();
        calculator.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        calculator.setSize(300, 300);
        calculator.setVisible(true);
    }
}

这个计算器窗口可以接受用户的输入，并根据用户的操作进行相应的计算，最后在窗口上显示计算结果。运行程序后，它会显示一个包含数字按钮、运算符按钮和一个文本框的窗口，用户可以通过点击按钮来输入数字和运算符，最后点击“=”按钮来进行计算，计算结果会显示在文本框中。