Java用swing组件编写一个计算机程序，功能包括加减乘除，开方，百分数，及倒数计算

好的，以下是一个使用Java Swing组件编写的计算器程序，包括加减乘除、开方、百分比和倒数等常用计算功能：

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

public class Calculator extends JFrame implements ActionListener {

    private JTextField textField;
    private JButton button1, button2, button3, button4, button5, button6, button7, button8, button9, button0;
    private JButton buttonAdd, buttonSub, buttonMul, buttonDiv, buttonSqrt, buttonPercent, buttonReciprocal;
    private JButton buttonDot, buttonEqual, buttonClear;
    private double num1, num2, result;
    private String operator;

    public Calculator() {

        // 设置标题
        setTitle("计算器");

        // 创建文本框
        textField = new JTextField();
        textField.setEditable(false);

        // 创建数字按钮
        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");
        button0 = new JButton("0");

        // 创建运算符按钮
        buttonAdd = new JButton("+");
        buttonSub = new JButton("-");
        buttonMul = new JButton("*");
        buttonDiv = new JButton("/");
        buttonSqrt = new JButton("√");
        buttonPercent = new JButton("%");
        buttonReciprocal = new JButton("1/x");

        // 创建其他按钮
        buttonDot = new JButton(".");
        buttonEqual = new JButton("=");
        buttonClear = new JButton("C");

        // 设置按钮的字体
        Font buttonFont = new Font("宋体", Font.PLAIN, 20);
        button1.setFont(buttonFont);
        button2.setFont(buttonFont);
        button3.setFont(buttonFont);
        button4.setFont(buttonFont);
        button5.setFont(buttonFont);
        button6.setFont(buttonFont);
        button7.setFont(buttonFont);
        button8.setFont(buttonFont);
        button9.setFont(buttonFont);
        button0.setFont(buttonFont);
        buttonAdd.setFont(buttonFont);
        buttonSub.setFont(buttonFont);
        buttonMul.setFont(buttonFont);
        buttonDiv.setFont(buttonFont);
        buttonSqrt.setFont(buttonFont);
        buttonPercent.setFont(buttonFont);
        buttonReciprocal.setFont(buttonFont);
        buttonDot.setFont(buttonFont);
        buttonEqual.setFont(buttonFont);
        buttonClear.setFont(buttonFont);

        // 创建面板
        JPanel panel1 = new JPanel();
        JPanel panel2 = new JPanel();
        JPanel panel3 = new JPanel();
        JPanel panel4 = new JPanel();
        JPanel panel5 = new JPanel();
        JPanel panel6 = new JPanel();

        // 设置面板的布局
        panel1.setLayout(new FlowLayout(FlowLayout.CENTER));
        panel2.setLayout(new GridLayout(4, 3, 5, 5));
        panel3.setLayout(new GridLayout(1, 2, 5, 5));
        panel4.setLayout(new GridLayout(1, 2, 5, 5));
        panel5.setLayout(new GridLayout(1, 4, 5, 5));
        panel6.setLayout(new GridLayout(1, 2, 5, 5));

        // 将组件添加到面板中
        panel1.add(textField);
        panel2.add(button7);
        panel2.add(button8);
        panel2.add(button9);
        panel2.add(button4);
        panel2.add(button5);
        panel2.add(button6);
        panel2.add(button1);
        panel2.add(button2);
        panel2.add(button3);
        panel2.add(button0);
        panel2.add(buttonDot);
        panel2.add(buttonClear);
        panel3.add(buttonSqrt);
        panel3.add(buttonPercent);
        panel4.add(buttonReciprocal);
        panel4.add(buttonDiv);
        panel5.add(buttonMul);
        panel5.add(buttonSub);
        panel5.add(buttonAdd);
        panel5.add(buttonEqual);
        panel6.add(buttonClear);

        // 将面板添加到窗口中
        add(panel1, BorderLayout.NORTH);
        add(panel2, BorderLayout.CENTER);
        add(panel3, BorderLayout.EAST);
        add(panel4, BorderLayout.WEST);
        add(panel5, BorderLayout.SOUTH);
        add(panel6, BorderLayout.SOUTH);

        // 为按钮添加事件监听器
        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);
        button0.addActionListener(this);
        buttonAdd.addActionListener(this);
        buttonSub.addActionListener(this);
        buttonMul.addActionListener(this);
        buttonDiv.addActionListener(this);
        buttonSqrt.addActionListener(this);
        buttonPercent.addActionListener(this);
        buttonReciprocal.addActionListener(this);
        buttonDot.addActionListener(this);
        buttonEqual.addActionListener(this);
        buttonClear.addActionListener(this);

        // 设置窗口的大小、位置、可见性和关闭方式
        setSize(300, 400);
        setLocationRelativeTo(null);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    // 处理按钮事件的方法
    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() == buttonDot) {
            if (textField.getText().indexOf(".") == -1) {
                textField.setText(textField.getText() + ".");
            }
        } else if (e.getSource() == buttonClear) {
            textField.setText("");
        } else if (e.getSource() == buttonAdd) {
            num1 = Double.parseDouble(textField.getText());
            operator = "+";
            textField.setText("");
        } else if (e.getSource() == buttonSub) {
            num1 = Double.parseDouble(textField.getText());
            operator = "-";
            textField.setText("");
        } else if (e.getSource() == buttonMul) {
            num1 = Double.parseDouble(textField.getText());
            operator = "*";
            textField.setText("");
        } else if (e.getSource() == buttonDiv) {
            num1 = Double.parseDouble(textField.getText());
            operator = "/";
            textField.setText("");
        } else if (e.getSource() == buttonSqrt) {
            num1 = Double.parseDouble(textField.getText());
            result = Math.sqrt(num1);
            textField.setText(Double.toString(result));
        } else if (e.getSource() == buttonPercent) {
            num1 = Double.parseDouble(textField.getText());
            result = num1 / 100;
            textField.setText(Double.toString(result));
        } else if (e.getSource() == buttonReciprocal) {
            num1 = Double.parseDouble(textField.getText());
            result = 1 / num1;
            textField.setText(Double.toString(result));
        } else if (e.getSource() == buttonEqual) {
            num2 = Double.parseDouble(textField.getText());
            if (operator.equals("+")) {
                result = num1 + num2;
            } else if (operator.equals("-")) {
                result = num1 - num2;
            } else if (operator.equals("*")) {
                result = num1 * num2;
            } else if (operator.equals("/")) {
                result = num1 / num2;
            }
            textField.setText(Double.toString(result));
        }
    }

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

这个程序通过创建多个面板，将各个组件添加到不同的面板中，实现了一个简单的计算器界面。在按钮的事件处理方法中，根据用户的点击操作，执行相应的计算，并将结果显示在文本框中。其中，sqrt、% 和 1/x 操作通过 Java 提供的 Math 类实现。