用java设计计算器窗口

好的，我可以为您提供一些基本的Java代码，用于设计一个简单的计算器窗口。

首先，您需要使用Java GUI库来创建窗口。这里我将使用Swing库，它是Java标准库的一部分。

以下是一个示例代码，可以帮助您创建一个具有基本操作的计算器窗口：

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

public class Calculator extends JFrame implements ActionListener {

    private JTextField textField;
    private JButton button1, button2, button3, button4, button5, button6, button7, button8, button9, button0;
    private JButton addButton, subtractButton, multiplyButton, divideButton, equalButton, clearButton;

    private double num1 = 0, num2 = 0, result = 0;
    private int operator = 0;

    public Calculator() {

        setTitle("Calculator");
        setSize(300, 300);
        setLayout(new GridLayout(5, 3));
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        textField = new JTextField();
        add(textField);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        equalButton = new JButton("=");
        add(equalButton);
        equalButton.addActionListener(this);

        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {

        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() == button0) {
            textField.setText(textField.getText() + "0");
        } else if (e.getSource() == clearButton) {
            textField.setText("");
            num1 = 0;
            num2 = 0;
            result = 0;
            operator = 0;
        } else if (e.getSource() == addButton) {
            num1 = Double.parseDouble(textField.getText());
            operator = 1;
            textField.setText("");
        } else if (e.getSource() == subtractButton) {
            num1 = Double.parseDouble(textField.getText());
            operator = 2;
            textField.setText("");
        } else if (e.getSource() == multiplyButton) {
            num1 = Double.parseDouble(textField.getText());
            operator = 3;
            textField.setText("");
        } else if (e.getSource() == divideButton) {
            num1 = Double.parseDouble(textField.getText());
            operator = 4;
            textField.setText("");
        } else if (e.getSource() == equalButton) {
            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;
            }

            textField.setText(Double.toString(result));
        }
    }

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

以上代码创建了一个带有数字按钮和操作符按钮的计算器窗口。在单击这些按钮时，它们将追加到文本字段中。还有一个“C”按钮，用于清除文本字段和操作数。当单击加、减、乘、除或等于按钮时，它们将执行相应的数学运算，并将结果显示在文本字段中。

希望这可以帮助您开始设计您自己的计算器窗口！