程序员计算器（Java实现）_程序员计算器资源-CSDN下载

共24个文件

class：17个

java：4个

classpath：1个

程序员计算器

Java

Swing

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【程序员计算器（Java实现）】在编程领域，创建一个自定义计算器是常见的练习项目，它有助于提升编程技能，特别是对于初学者来说。本项目是一个基于Java实现的程序员计算器，模仿了Windows 7操作系统中自带的程序员计算器功能。这个计算器不仅包含基本的加、减、乘、除等操作，还提供了进制转换、位运算等功能，对于程序员日常开发工作非常实用。我们需要了解Java Swing库，它是Java提供的用于创建图形用户界面（GUI）的工具包。Swing提供了丰富的组件，如按钮、文本框、标签等，可以方便地构建出复杂的窗口应用。在本项目中，`JFrame`作为主窗口，`JButton`用于表示各个数字和运算符，`JPanel`用于组织这些组件，而`JLabel`则显示计算结果。项目的实现主要包括以下几个方面： 1. **用户界面设计**：使用Swing组件搭建计算器的布局。这包括设置窗口大小、位置，以及将按钮和显示区域排列得如同原版计算器一样。`GridLayout`和`BoxLayout`等布局管理器可以帮助我们更好地布局组件。 2. **事件处理**：每个按钮点击时都会触发一个事件，因此我们需要为每个按钮注册事件监听器。在Java中，通常使用匿名内部类实现`ActionListener`接口，覆盖`actionPerformed`方法，以处理按钮被点击时的逻辑。 3. **计算逻辑**：这是计算器的核心部分，需要编写对应的函数来处理各种运算。例如，加法、减法、乘法、除法，以及进制转换（如二进制转十进制、十六进制等）。此外，还要处理位运算，如左移、右移、按位与、按位或、按位异或等。这些函数应设计成可复用的，方便在其他项目中引用。 4. **显示结果**：当计算完成后，结果需要显示在计算器的显示屏上。可以使用`JLabel`来实现这一功能，更新其`setText`方法以显示当前的计算结果。 5. **错误处理**：计算器需要能够处理各种可能的错误，比如除数为零、超出数值范围等。在遇到这些情况时，应给出相应的错误提示，并保持计算器的正常使用状态。 6. **进制转换**：为了实现不同进制之间的转换，需要编写函数将数字从一种进制转换为另一种。这涉及到对位运算的理解和应用，例如，将二进制转换为十进制可以通过累加权重的方式实现。 7. **位运算**：位运算符包括&（按位与）、|（按位或）、^（按位异或）、~（按位非）、<<（左移）、>>（有符号右移）和>>>（无符号右移）。理解这些运算符的含义和用法是实现位运算功能的关键。通过这个项目，程序员不仅可以学习到Java GUI编程，还能加深对位运算、进制转换以及错误处理等编程概念的理解。同时，这个计算器的实现也锻炼了代码组织和模块化的能力，有助于提升整体编程素养。在实际工作中，这样的自定义工具可以极大地提高开发效率，让程序员的工作更加便捷。

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Calculator.rar （24个子文件）

Calculator

bin

MainFrame$11.class 3KB

MainFrame.class 17KB

MainFrame$7.class 1KB

MainFrame$5.class 1022B

MainFrame$12.class 898B

ArithHelper.class 3KB

MainFrame$4.class 1KB

MainFrame$3.class 896B

MainFrame$6.class 1KB

Main.class 2KB

MainFrame$10.class 898B

Main$1.class 747B

MainFrame$9.class 896B

MainFrame$2.class 1KB

Calculator.class 4KB

MainFrame$1.class 692B

MainFrame$8.class 896B

.settings

org.eclipse.jdt.core.prefs 598B

src

ArithHelper.java 5KB

Calculator.java 7KB

MainFrame.java 28KB

Main.java 2KB

.project 386B

.classpath 301B

import java.awt.EventQueue; import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.ArrayList; import java.util.List; import java.util.Stack; import javax.swing.ButtonGroup; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JRadioButton; import javax.swing.SwingConstants; import javax.swing.border.EmptyBorder; public class MainFrame extends JFrame implements ActionListener{ private JPanel contentPane; private JLabel mainLable = null; private JLabel bitLable = null; private JRadioButton Hex = null; private JRadioButton Dec = null; private JRadioButton Oct = null; private JRadioButton Bin = null; private JRadioButton Qword = null; private JRadioButton Dword= null; private JRadioButton Word= null; private JRadioButton Byte= null; private JButton btnQout = null; private JButton Mod = null; private JButton A = null; private JButton B = null; private JButton button_del = null; private JButton CE = null; private JButton C2 = null; private JButton PAN= null; private JButton C = null; private JButton Seven = null; private JButton Eight = null; private JButton Nine = null; private JButton Division = null; private JButton D = null; private JButton Four = null; private JButton Five = null; private JButton Six = null; private JButton Mul = null; private JButton E = null; private JButton One = null; private JButton Two = null; private JButton Three = null; private JButton Sub = null; private JButton equal = null; private JButton F = null; private JButton Zero = null; private JButton Add = null; Stack<Integer> numStack = new Stack(); Stack<Integer> symbol = new Stack(); int currentInteger; boolean newNum = true; StringBuffer nowNum = new StringBuffer("0"); List<String> expression = new ArrayList<String>(); String Progressive = "Dec"; String s = "0000000000000000000000000000000000000000000000000000000000000000"; /** * Launch the application. */ public ButtonGroup g=new ButtonGroup(); public ButtonGroup g1=new ButtonGroup(); public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { MainFrame frame = new MainFrame(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ void showBitLableText(String n){ if("Hex".equals(Progressive)) n = Integer.toBinaryString(Integer.valueOf(n,16)); else if("Dec".equals(Progressive)) n = Integer.toBinaryString(Integer.parseInt(n)); else if("Oct".equals(Progressive)) n = Integer.toBinaryString(Integer.valueOf(n,8)); StringBuffer sf = new StringBuffer(s); for(int i=n.length()-1,j = s.length()-1;i>=0;i--,j--){ sf.setCharAt(j, n.charAt(i)); } s = sf.toString(); String bitLableText = "<html>" + s.substring(0,4)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(4,8)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(8,12)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(12,16)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(16,20)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(20,24)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(24,28)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(28,32)+"<br/>" + "63 &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp 47 &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp 32<br/>" + s.substring(32,36)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(36,40)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(40,44)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(44,48)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(48,52)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(52,56)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(56,60)+" &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp "+s.substring(60,64)+"<br/>" + "31 &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp 15 &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp 0" + "</html>"; bitLable.setText(bitLableText); s = "0000000000000000000000000000000000000000000000000000000000000000"; } public MainFrame() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 530, 430); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); setContentPane(contentPane); contentPane.setLayout(null); mainLable = new JLabel(nowNum.toString(),SwingConstants.RIGHT); mainLable.setFont(new Font("Calibri", Font.PLAIN, 22)); mainLable.setBounds(10, 10, 501, 32); contentPane.add(mainLable); bitLable = new JLabel(""); bitLable.setBounds(10, 52, 501, 82); contentPane.add(bitLable); showBitLableText("0"); Hex = new JRadioButton("Hex"); Hex.setBounds(10, 140, 80, 23); contentPane.add(Hex); Hex.addActionListener(this); Dec = new JRadioButton("Dec"); Dec.setBounds(10, 170, 80, 23); contentPane.add(Dec); Dec.setSelected(true); Dec.addActionListener(this); Oct = new JRadioButton("Oct"); Oct.setBounds(10, 200, 80, 23); contentPane.add(Oct); Oct.addActionListener(this); Bin = new JRadioButton("Bin"); Bin.setBounds(10, 230, 80, 23); contentPane.add(Bin); Bin.addActionListener(this); g.add(Hex); g.add(Dec); g.add(Oct); g.add(Bin); Qword = new JRadioButton("Qword"); Qword.setBounds(10, 280, 80, 23); contentPane.add(Qword); Qword.setSelected(true); Dword = new JRadioButton("Dword"); Dword.setBounds(10, 310, 80, 23); contentPane.add(Dword); Word = new JRadioButton("Word"); Word.setBounds(10, 340, 80, 23); contentPane.add(Word); Byte = new JRadioButton("Byte"); Byte.setBounds(10, 370, 80, 23); contentPane.add(Byte); g1.add(Qword); g1.add(Dword); g1.add(Word); g1.add(Byte); btnQout = new JButton("Quot"); btnQout.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { expression.add(nowNum.toString()); expression.add("quot"); nowNum.delete(0, nowNum.length()); nowNum.append(0); } }); btnQout.setFont(new Font("Calibri", Font.PLAIN, 8)); btnQout.setBounds(96, 137, 51, 40); contentPane.add(btnQout); JButton Mod = new JButton("Mod"); Mod.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { expression.add(nowNum.toString()); expression.add("%"); newNum = true; } }); Mod.setFont(new Font("Calibri", Font.PLAIN, 8)); Mod.setBounds(148, 137, 51, 40); contentPane.add(Mod); A = new JButton("A"); A.addActionListener(this); A.setEnabled(false); A.setFont(new Font("Calibri", Font.PLAIN, 9)); A.setBounds(200, 137, 51, 40); contentPane.add(A); JButton MC = new JButton("MC"); MC.setFont(new Font("Calibri", Font.PLAIN, 9)); MC.setBounds(252, 137, 51, 40); MC.setEnabled(false); contentPane.add(MC); JButton MR = new JButton("MR"); MR.setFont(new Font("Calibri", Font.PLAIN, 9)); MR.setBounds(304, 137, 51, 40); MR.setEnabled(false); contentPane.add(MR);

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