如何java设计计算器并实现功能

一个老神仙 2021-09-18 16:36 221 次浏览 赞 124

最新问答

  • 微笑藤弥

    java设计计算器,主要是使用java swing,对每个按钮进行,实现相关功能,如下代:

    package com.qiu.lin.he;
    import java.awt.BorderLayout;
    import java.awt.Color;
    import java.awt.GridLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;

    import javax.swing.ImageIcon;
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.JTextField;
    import javax.swing.SwingConstants;

    public class Jisuanqi extends JFrame implements ActionListener {
    /**
    *
    */
    private static final long serialVersionUID = 1L;
    Result result = new Result(); // 定义text的面板
    Number_Key number_key = new Number_Key(); // 定义按钮面板
    // 当点击按钮+、-、*、/时,com = true
    boolean com = false;

    // 当i=0时说明是我们第一次输入,字符串text不会累加
    int i = 0;

    // 存放text的内容
    String text = "";
    // 存放点击按钮+、-、*、/之前的数值
    double defbutton = 0;

    // +、-、*、/的代号分别为1,2,3,4
    int symbol = 0;

    // 构造函数
    Jisuanqi() {
    super("WangJiao"); // 设定标题
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 设定关闭窗体时退出程序
    JPanel pane = new JPanel(); // 定义主面板
    pane.setLayout(new BorderLayout());
    setBounds(380, 220, 30, 80); // 前两个参数是在屏幕上显示的坐标,后两个是大小
    // 替换图标
    ImageIcon icon = new ImageIcon("F:1.GIF");
    // Jisuanqi.class.getResource("APPLE.GIF")
    // );
    setIconImage(icon.getImage());
    pane.add(result, BorderLayout.NORTH);
    pane.add(number_key, BorderLayout.CENTER);
    pane.add(number_key.equal, BorderLayout.SOUTH);

    number_key.one.addActionListener(this); // 对1按钮
    number_key.two.addActionListener(this); // 对2按钮
    number_key.three.addActionListener(this); // 对3按钮
    number_key.four.addActionListener(this); // 对4按钮
    number_key.five.addActionListener(this); // 对5按钮
    number_key.six.addActionListener(this); // 对6按钮
    number_key.seven.addActionListener(this); // 对7按钮
    number_key.eight.addActionListener(this); // 对8按钮
    number_key.nine.addActionListener(this); // 对9按钮
    number_key.zero.addActionListener(this); // 对0按钮
    number_key.ce.addActionListener(this); // 对置零按钮
    number_key.plus.addActionListener(this); // 对+按钮
    number_key.equal.addActionListener(this); // 对=按钮
    number_key.sub.addActionListener(this); // 对-按钮
    number_key.mul.addActionListener(this); // 对*按钮
    number_key.div.addActionListener(this); // 对/按钮
    number_key.point.addActionListener(this); // 对.按钮

    setContentPane(pane);
    pack(); // 初始化窗体大小为正好盛放所有按钮
    }

    // 各个按钮触发的
    public void actionPerformed(ActionEvent e) {

    /*
    * 如果是点击数字按钮那么先要判断是否在此之前点击了+、-、*、/、=,如果是那么com=true 如果没有com=
    * false;或者是否点击数字键,如果是i = 1,如果没有 i = 0;
    */
    if (e.getSource() == number_key.one) {
    if (com || i == 0) {
    result.text.setText("1");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "1");
    }
    } else if (e.getSource() == number_key.two) {
    if (com || i == 0) {
    result.text.setText("2");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "2");
    }

    } else if (e.getSource() == number_key.three) {
    if (com || i == 0) {
    result.text.setText("3");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "3");
    }
    } else if (e.getSource() == number_key.four) {
    if (com || i == 0) {
    result.text.setText("4");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "4");
    }
    } else if (e.getSource() == number_key.five) {
    if (com || i == 0) {
    result.text.setText("5");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "5");
    }
    } else if (e.getSource() == number_key.six) {
    if (com || i == 0) {
    result.text.setText("6");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "6");
    }
    } else if (e.getSource() == number_key.seven) {
    if (com || i == 0) {
    result.text.setText("7");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "7");
    }
    } else if (e.getSource() == number_key.eight) {
    if (com || i == 0) {
    result.text.setText("8");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "8");
    }
    } else if (e.getSource() == number_key.nine) {
    if (com || i == 0) {
    result.text.setText("9");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "9");
    }
    }

    /*
    * 对于0这个按钮有一定的说法,在我的程序里不会出现如00000这样的情况,我加了判断条件就是
    * 如果text中的数值=0就要判断在这个数值中是否有.存在?如果有那么就在原来数值基础之上添 加0;否则保持原来的数值不变
    */
    else if (e.getSource() == number_key.zero) { // result.text.getText()是得到text里内容的意思
    if (com || i == 0) {
    result.text.setText("0");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    if (Float.parseFloat(text) > 0 || Float.parseFloat(text) < 0) { // Float.parseFloat(text)就是类型转换了,下面都是一样
    result.text.setText(text + "0");
    } else {
    if (text.trim().indexOf(".") == -1) {
    result.text.setText(text);
    } else {
    result.text.setText(text + "0");
    }
    }
    }
    } else if (e.getSource() == number_key.ce) {
    result.text.setText("0");
    i = 0;
    com = true;
    // text = "";
    defbutton = 0;
    }
    /*
    * 本程序不会让一个数值中出现2个以上的小数点.具体做法是:判断是否已经存在.存在就不, 不存在就.
    */
    else if (e.getSource() == number_key.point) {
    if (com || i == 0) {
    result.text.setText("0.");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    if (text.trim().indexOf(".") == -1) {
    result.text.setText(text + ".");
    } else {
    result.text.setText(text);
    }

    }
    } // 获得点击+之前的数值
    else if (e.getSource() == number_key.plus) {
    com = true;
    i = 0;
    defbutton = Double.parseDouble(result.text.getText());
    symbol = 1;
    } // 获得点击-之前的数值
    else if (e.getSource() == number_key.sub) {
    com = true;
    i = 0;
    defbutton = Double.parseDouble(result.text.getText());

    symbol = 2;
    } // 获得点击*之前的数值
    else if (e.getSource() == number_key.mul) {
    com = true;
    i = 0;
    defbutton = Double.parseDouble(result.text.getText());
    System.out.println(defbutton);
    symbol = 3;
    } // 获得点击/之前的数值
    else if (e.getSource() == number_key.div) {
    com = true;
    i = 0;
    defbutton = Double.parseDouble(result.text.getText());
    symbol = 4;
    } else if (e.getSource() == number_key.equal) {

    switch (symbol) {
    case 1: { // 计算加法
    double ad = defbutton
    + Double.parseDouble(result.text.getText());
    result.text.setText(ad + "");
    i = 0;
    text = "";
    break;
    }
    case 2: { // 计算减法
    double ad = defbutton
    - Double.parseDouble(result.text.getText());
    result.text.setText(String.valueOf(ad));
    i = 0;
    text = "";
    break;
    }
    case 3: { // 计算乘法
    double ad = defbutton
    * Double.parseDouble(result.text.getText());

    result.text.setText(ad + "");
    i = 0;
    text = "";
    break;
    }
    case 4: { // 计算除法
    double ad = defbutton
    / Double.parseDouble(result.text.getText());
    result.text.setText(ad + "");
    i = 0;
    text = "";
    break;
    }
    }

    System.out.println(com);
    }
    System.out.println(result.text.getText());
    }

    @SuppressWarnings("deprecation")
    public static void main(String[] args) {
    Jisuanqi loveyou = new Jisuanqi();
    loveyou.show();
    }
    }

    // 计算器数字按钮定义面板
    class Number_Key extends JPanel {

    /**
    *
    */
    private static final long serialVersionUID = 1L;
    JButton zero = new JButton("0"); // 数字键0
    JButton one = new JButton("1"); // 数字键1
    JButton two = new JButton("2"); // 数字键2
    JButton three = new JButton("3"); // 数字键3
    JButton four = new JButton("4"); // 数字键4
    JButton five = new JButton("5"); // 数字键5
    JButton six = new JButton("6"); // 数字键6
    JButton seven = new JButton("7"); // 数字键7
    JButton eight = new JButton("8"); // 数字键8
    JButton nine = new JButton("9"); // 数字键9

    JButton plus = new JButton("+");
    JButton sub = new JButton("-");
    JButton mul = new JButton("*");
    JButton div = new JButton("/");
    JButton equal = new JButton("=");
    JButton ce = new JButton("清零"); // 置零键
    JButton point = new JButton(".");

    Number_Key() {
    setLayout(new GridLayout(4, 4, 1, 1)); // 定义布局管理器为网格布局

    setBackground(Color.blue); // 设置背景颜色
    // 按钮
    add(one);
    add(two);
    add(three);
    add(four);
    add(five);
    add(six);
    add(seven);
    add(eight);
    add(nine);
    add(zero);
    add(plus);
    add(sub);
    add(mul);
    add(div);
    add(point);
    add(equal);
    add(ce);
    }
    }

    // 计算器显示结果的窗体
    class Result extends JPanel {
    /**
    *
    */
    private static final long serialVersionUID = 1L;
    // text先是输入和结果
    JTextField text = new JTextField("0");

    @SuppressWarnings("deprecation")
    Result() { // 讲输入的数字或得到的结果在text的右边显示
    text.setHorizontalAlignment(SwingConstants.RIGHT);
    text.enable(false); // 文本框不能编辑
    setLayout(new BorderLayout()); // 设定布局管理器边框布局
    add(text, BorderLayout.CENTER); // text放置在窗体的中间
    }
    }

    运行结果如下:

    浏览 375赞 110时间 2024-02-19
  • bismarck66

    import java.awt.BorderLayout;
    import java.awt.Color;
    import java.awt.GridLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;

    import javax.swing.ImageIcon;
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.JTextField;
    import javax.swing.SwingConstants;

    public class Jisuanqi extends JFrame implements ActionListener {
    /**
    *
    */
    private static final long serialVersionUID = 1L;
    Result result = new Result(); // 定义text的面板
    Number_Key number_key = new Number_Key(); // 定义按钮面板
    // 当点击按钮+、-、*、/时,com = true
    boolean com = false;

    // 当i=0时说明是我们第一次输入,字符串text不会累加
    int i = 0;

    // 存放text的内容
    String text = "";
    // 存放点击按钮+、-、*、/之前的数值
    double defbutton = 0;

    // +、-、*、/的代号分别为1,2,3,4
    int symbol = 0;

    // 构造函数
    Jisuanqi() {
    super("WangJiao"); // 设定标题
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 设定关闭窗体时退出程序
    JPanel pane = new JPanel(); // 定义主面板
    pane.setLayout(new BorderLayout());
    setBounds(380, 220, 30, 80); // 前两个参数是在屏幕上显示的坐标,后两个是大小
    // 替换图标
    ImageIcon icon = new ImageIcon("F:1.GIF");
    // Jisuanqi.class.getResource("APPLE.GIF")
    // );
    setIconImage(icon.getImage());
    pane.add(result, BorderLayout.NORTH);
    pane.add(number_key, BorderLayout.CENTER);
    pane.add(number_key.equal, BorderLayout.SOUTH);

    number_key.one.addActionListener(this); // 对1按钮
    number_key.two.addActionListener(this); // 对2按钮
    number_key.three.addActionListener(this); // 对3按钮
    number_key.four.addActionListener(this); // 对4按钮
    number_key.five.addActionListener(this); // 对5按钮
    number_key.six.addActionListener(this); // 对6按钮
    number_key.seven.addActionListener(this); // 对7按钮
    number_key.eight.addActionListener(this); // 对8按钮
    number_key.nine.addActionListener(this); // 对9按钮
    number_key.zero.addActionListener(this); // 对0按钮
    number_key.ce.addActionListener(this); // 对置零按钮
    number_key.plus.addActionListener(this); // 对+按钮
    number_key.equal.addActionListener(this); // 对=按钮
    number_key.sub.addActionListener(this); // 对-按钮
    number_key.mul.addActionListener(this); // 对*按钮
    number_key.div.addActionListener(this); // 对/按钮
    number_key.point.addActionListener(this); // 对.按钮

    setContentPane(pane);
    pack(); // 初始化窗体大小为正好盛放所有按钮
    }

    // 各个按钮触发的
    public void actionPerformed(ActionEvent e) {

    /*
    * 如果是点击数字按钮那么先要判断是否在此之前点击了+、-、*、/、=,如果是那么com=true 如果没有com=
    * false;或者是否点击数字键,如果是i = 1,如果没有 i = 0;
    */
    if (e.getSource() == number_key.one) {
    if (com || i == 0) {
    result.text.setText("1");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "1");
    }
    } else if (e.getSource() == number_key.two) {
    if (com || i == 0) {
    result.text.setText("2");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "2");
    }

    } else if (e.getSource() == number_key.three) {
    if (com || i == 0) {
    result.text.setText("3");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "3");
    }
    } else if (e.getSource() == number_key.four) {
    if (com || i == 0) {
    result.text.setText("4");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "4");
    }
    } else if (e.getSource() == number_key.five) {
    if (com || i == 0) {
    result.text.setText("5");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "5");
    }
    } else if (e.getSource() == number_key.six) {
    if (com || i == 0) {
    result.text.setText("6");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "6");
    }
    } else if (e.getSource() == number_key.seven) {
    if (com || i == 0) {
    result.text.setText("7");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "7");
    }
    } else if (e.getSource() == number_key.eight) {
    if (com || i == 0) {
    result.text.setText("8");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "8");
    }
    } else if (e.getSource() == number_key.nine) {
    if (com || i == 0) {
    result.text.setText("9");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    result.text.setText(text + "9");
    }
    }

    /*
    * 对于0这个按钮有一定的说法,在我的程序里不会出现如00000这样的情况,我加了判断条件就是
    * 如果text中的数值=0就要判断在这个数值中是否有.存在?如果有那么就在原来数值基础之上添 加0;否则保持原来的数值不变
    */
    else if (e.getSource() == number_key.zero) { // result.text.getText()是得到text里内容的意思
    if (com || i == 0) {
    result.text.setText("0");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    if (Float.parseFloat(text) > 0 || Float.parseFloat(text) < 0) { // Float.parseFloat(text)就是类型转换了,下面都是一样
    result.text.setText(text + "0");
    } else {
    if (text.trim().indexOf(".") == -1) {
    result.text.setText(text);
    } else {
    result.text.setText(text + "0");
    }
    }
    }
    } else if (e.getSource() == number_key.ce) {
    result.text.setText("0");
    i = 0;
    com = true;
    // text = "";
    defbutton = 0;
    }
    /*
    * 本程序不会让一个数值中出现2个以上的小数点.具体做法是:判断是否已经存在.存在就不, 不存在就.
    */
    else if (e.getSource() == number_key.point) {
    if (com || i == 0) {
    result.text.setText("0.");
    com = false;
    i = 1;
    } else {
    text = result.text.getText();
    if (text.trim().indexOf(".") == -1) {
    result.text.setText(text + ".");
    } else {
    result.text.setText(text);
    }

    }
    } // 获得点击+之前的数值
    else if (e.getSource() == number_key.plus) {
    com = true;
    i = 0;
    defbutton = Double.parseDouble(result.text.getText());
    symbol = 1;
    } // 获得点击-之前的数值
    else if (e.getSource() == number_key.sub) {
    com = true;
    i = 0;
    defbutton = Double.parseDouble(result.text.getText());

    symbol = 2;
    } // 获得点击*之前的数值
    else if (e.getSource() == number_key.mul) {
    com = true;
    i = 0;
    defbutton = Double.parseDouble(result.text.getText());
    System.out.println(defbutton);
    symbol = 3;
    } // 获得点击/之前的数值
    else if (e.getSource() == number_key.div) {
    com = true;
    i = 0;
    defbutton = Double.parseDouble(result.text.getText());
    symbol = 4;
    } else if (e.getSource() == number_key.equal) {

    switch (symbol) {
    case 1: { // 计算加法
    double ad = defbutton
    + Double.parseDouble(result.text.getText());
    result.text.setText(ad + "");
    i = 0;
    text = "";
    break;
    }
    case 2: { // 计算减法
    double ad = defbutton
    - Double.parseDouble(result.text.getText());
    result.text.setText(String.valueOf(ad));
    i = 0;
    text = "";
    break;
    }
    case 3: { // 计算乘法
    double ad = defbutton
    * Double.parseDouble(result.text.getText());

    result.text.setText(ad + "");
    i = 0;
    text = "";
    break;
    }
    case 4: { // 计算除法
    double ad = defbutton
    / Double.parseDouble(result.text.getText());
    result.text.setText(ad + "");
    i = 0;
    text = "";
    break;
    }
    }

    System.out.println(com);
    }
    System.out.println(result.text.getText());
    }

    @SuppressWarnings("deprecation")
    public static void main(String[] args) {
    Jisuanqi loveyou = new Jisuanqi();
    loveyou.show();
    }
    }

    // 计算器数字按钮定义面板
    class Number_Key extends JPanel {

    /**
    *
    */
    private static final long serialVersionUID = 1L;
    JButton zero = new JButton("0"); // 数字键0
    JButton one = new JButton("1"); // 数字键1
    JButton two = new JButton("2"); // 数字键2
    JButton three = new JButton("3"); // 数字键3
    JButton four = new JButton("4"); // 数字键4
    JButton five = new JButton("5"); // 数字键5
    JButton six = new JButton("6"); // 数字键6
    JButton seven = new JButton("7"); // 数字键7
    JButton eight = new JButton("8"); // 数字键8
    JButton nine = new JButton("9"); // 数字键9

    JButton plus = new JButton("+");
    JButton sub = new JButton("-");
    JButton mul = new JButton("*");
    JButton div = new JButton("/");
    JButton equal = new JButton("=");
    JButton ce = new JButton("清零"); // 置零键
    JButton point = new JButton(".");

    Number_Key() {
    setLayout(new GridLayout(4, 4, 1, 1)); // 定义布局管理器为网格布局

    setBackground(Color.blue); // 设置背景颜色
    // 按钮
    add(one);
    add(two);
    add(three);
    add(four);
    add(five);
    add(six);
    add(seven);
    add(eight);
    add(nine);
    add(zero);
    add(plus);
    add(sub);
    add(mul);
    add(div);
    add(point);
    add(equal);
    add(ce);
    }
    }

    // 计算器显示结果的窗体
    class Result extends JPanel {
    /**
    *
    */
    private static final long serialVersionUID = 1L;
    // text先是输入和结果
    JTextField text = new JTextField("0");

    @SuppressWarnings("deprecation")
    Result() { // 讲输入的数字或得到的结果在text的右边显示
    text.setHorizontalAlignment(SwingConstants.RIGHT);
    text.enable(false); // 文本框不能编辑
    setLayout(new BorderLayout()); // 设定布局管理器边框布局
    add(text, BorderLayout.CENTER); // text放置在窗体的中间
    }
    }

    浏览 185赞 121时间 2023-09-26
  • 嘚啵嘚啵的sissi

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

    public class Calculator
    {
    private JFrame jf;
    private JButton[] jbs;
    private JTextField jtf;
    private JButton clear;
    private double num1, num2, jieguo;
    private char c;
    private String jtfDouble;

    public String getJtfDouble()
    {
    return jtfDouble;
    }

    public void setJtfDouble(String jtfDouble)
    {
    this.jtfDouble = jtfDouble;
    }

    /**
    * 构造方法实例化属性
    *
    */
    public Calculator()
    {
    jf = new JFrame("我的计算器v1.0");
    jtf = new JTextField(20);
    clear = new JButton("clear");
    jbs = new JButton[16];
    String str = "123+456-789*0./=";
    for(int i = 0 ; i < str.length() ; i++)
    {
    jbs[i] = new JButton(str.charAt(i) + "");
    }
    init();
    addEventHandler();
    // setFont();
    // setColor();
    showMe();
    }

    /**
    * 布局图形界面
    *
    */
    public void init()
    {
    // jf.setLayout(manager)
    JPanel jp1 = new JPanel();
    jp1.add(jtf);

    JPanel jp2 = new JPanel();
    jp2.setLayout(new GridLayout(4, 4));
    for(int i = 0 ; i < 16 ; i++)
    {
    jp2.add(jbs[i]);
    }
    JPanel jp3 = new JPanel();
    jp3.add(clear);
    jf.add(jp1, BorderLayout.NORTH);
    jf.add(jp2, BorderLayout.CENTER);
    jf.add(jp3, BorderLayout.SOUTH);
    }

    public void setFont()
    {

    }

    public void setColor()
    {

    }

    public void addEventHandler()
    {
    ActionListener lis = new ActionListener()
    {

    public void actionPerformed(ActionEvent e)
    {
    // TODO Auto-generated method stub
    JButton jb = (JButton) e.getSource();
    // String key=(String)e.getActionCommand();
    String str = jb.getText().trim();// 把字符串的首尾空格去掉!
    // String str2=e.getActionCommand().trim();//返回源的文本内容
    if("0123456789.".indexOf(str) != -1)
    {// 如果是数字或点号
    jtf.setText(jtf.getText() + str);
    setJtfDouble(jtf.getText());
    return;
    }
    if("+-*/".indexOf(str) != -1)
    {
    num1 = Double.parseDouble(getJtfDouble());

    jtf.setText("");
    c = str.charAt(0);
    jtf.setText("");
    return;
    }
    if(str.equals("="))
    {
    num2 = Double.parseDouble(jtf.getText());
    // jtf.setText("");
    switch(c)
    {
    case '+' :
    jieguo = num1 + num2;
    break;
    case '-' :
    jieguo = num1 - num2;
    break;
    case '*' :
    jieguo = num1 * num2;
    break;
    case '/' :
    jieguo = num1 / num2;
    break;
    }
    jtf.setText(Double.toString(jieguo));
    return;
    }

    if(e.getActionCommand().equals("clear"))
    {

    jtf.setText("");
    return;
    }
    }
    };
    for(int i = 0 ; i < jbs.length ; i++)
    {

    jbs[i].addActionListener(lis);
    }
    clear.addActionListener(lis);
    }

    public void showMe()
    {
    jf.pack();
    jf.setVisible(true);
    jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    }

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

    }
    }

    浏览 373赞 108时间 2023-09-16
  • 让子弹飞888

    我跟有个现成的gui 计算机 要不

    浏览 312赞 132时间 2022-06-13

如何java设计计算器并实现功能