使用java语言编写一个具有图形化界面的科学计算器

好的，我可以为您提供一个使用Java语言编写的具有图形化界面的科学计算器示例。这里使用的是Java Swing库实现界面设计。代码如下：

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

public class ScientificCalculator extends JFrame implements ActionListener {

    private static final long serialVersionUID = 1L;

    private JTextField textField;

    private double num1, num2, result;
    private int operation;

    public ScientificCalculator() {
        setTitle("科学计算器");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        setSize(300, 400);
        setResizable(false);

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(5, 4, 5, 5));

        textField = new JTextField();
        textField.setEditable(false);
        textField.setHorizontalAlignment(SwingConstants.RIGHT);
        panel.add(textField);

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

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

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

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

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

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

        add(panel, BorderLayout.CENTER);
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        String buttonText = e.getActionCommand();
        if (buttonText.equals("C")) {
            textField.setText("");
            num1 = 0;
            num2 = 0;
            result = 0;
            operation = 0;
        } else if (buttonText.equals("+")) {
            num1 = Double.parseDouble(textField.getText());
            operation = 1;
            textField.setText("");
        } else if (buttonText.equals("-")) {
            num1 = Double.parseDouble(textField.getText());
            operation = 2;
            textField.setText("");
        } else if (buttonText.equals("*")) {
            num1 = Double.parseDouble(textField.getText());
            operation = 3;
            textField.setText("");
        } else if (buttonText.equals("/")) {
            num1 = Double.parseDouble(textField.getText());
            operation = 4;
            textField.setText("");
        } else if (buttonText.equals("^")) {
            num1 = Double.parseDouble(textField.getText());
            operation = 5;
            textField.setText("");
        } else if (buttonText.equals("√")) {
            num1 = Double.parseDouble(textField.getText());
            result = Math.sqrt(num1);
            textField.setText(String.valueOf(result));
        } else if (buttonText.equals("=")) {
            num2 = Double.parseDouble(textField.getText());
            switch (operation) {
                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(String.valueOf(result));
        } else {
            textField.setText(textField.getText() + buttonText);
        }
    }

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

这个示例使用了JFrame、JPanel、JTextField和JButton等Swing组件，实现了基本的数学运算、幂运算和开方等功能。你可以根据自己的需要添加更多的功能和组件。