Java实验报告_图形化界面计算器

封面/lzj，2015/11/29

Java实验报告

--图形化界面计算器

计算机22班

清哥荡漾

2120505047

目录

封面/lzj，2015/11/29 ..................................................................................................................- 1 - 目录 ..............................................................................................................................................- 2 -

一、实验要求.......................................................................................................................- 3 -

二、实验流程.......................................................................................................................- 3 -

1. 需求分析.......................................................................................................................- 3 -

2. 概要设计.......................................................................................................................- 3 -

3. 详细设计.......................................................................................................................- 4 -

3-1．代码结构 .............................................................................................................- 4 -

3-2．结构说明 .............................................................................................................- 4 -

4. 编码实现.......................................................................................................................- 5 -

5. 测试纠错.......................................................................................................................- 5 -

三、实验结果.......................................................................................................................- 6 -

1. 初始化界面...................................................................................................................- 6 -

2. 界面说明.......................................................................................................................- 7 -

2-1 显示部分 ...............................................................................................................- 7 -

2-2 控制部分 ...............................................................................................................- 8 -

3. 结果演示.......................................................................................................................- 8 -

3-1 单目运算 ...............................................................................................................- 8 -

3-2 双目运算 ...............................................................................................................- 9 -

3-3 混合运算 ............................................................................................................ - 10 -

3-4 错误演示 ............................................................................................................ - 11 -

3-5 保存本地操作结果 ............................................................................................ - 11 -

3-6 上传服务器操作演示 ........................................................................................ - 12 -

4. 总结结果.................................................................................................................... - 13 -

四、总结分析.................................................................................................................... - 13 -

五、实验代码.................................................................................................................... - 14 -

1. gui包.......................................................................................................................... - 14 -

GUI.java ...................................................................................................................... - 14 -

DispPanel.java ............................................................................................................ - 15 -

CtrlPanel.java ............................................................................................................. - 17 -

2. component 包 ........................................................................................................... - 18 -

MyButton.java ............................................................................................................ - 18 -

MyTestField.java ......................................................................................................... - 18 -

3. actionlistener包 ........................................................................................................ - 19 -

MyButtonActionListener.java ..................................................................................... - 19 -

4. operation包............................................................................................................... - 23 -

ArithmeLogic.java ....................................................................................................... - 23 -

UploadOperate.java ................................................................................................... - 35 -

SavaOparete.java ........................................................................................................ - 35 -

5. Main.java .................................................................................................................... - 37 -

一、实验要求

1.实现图形化界面计算器，完成基本功能

2.实现保存计算历史纪录到本地的功能

3.实现上传计算历史纪录到服务器的功能

二、实验流程

1.需求分析

1-1.对于基本功能，要求实现图形化界面计算器，则可参照电脑或手机上的计算器进行页面布局，最后加上各种监听器即可。

1-2.附加要求实现保存到本地，只需将内存中的历史纪录通过文件读写到本地即可。

1-3.附加要求实现上传至服务器，可以用TCP或者UDP报文通信实现

2.概要设计

2-1. 整体采用手机计算器布局架构

2-2. 屏幕显示用文本框实现

2-3. 按钮监听自定义ActionListener类

2-4. 输入时应限制错误输入

2-5. 运算时采用逆波兰式

2-6.保存本地功能采用随机读写方式添加至文件尾部

2-7. 上传采用UDP数据报方式

3.详细设计

3-1．代码结构

3-2．结构说明

gui包：实现图形化界面

GUI.java :整体架构

DispPanel.java:显示面板部分

CtrlPanel.java:控制面板部分

component包：用到的部件

MyButton.java:自定义JButton类，进行自定义设定

MyTextField.java:自定义JTextField类，用于屏幕显示

actionlistener包：监听器

MyButtonActionListener.java:对按钮进行监听操作，分别进行不同操作

operation包：计算、保存上传操作

ArithmeticLogic.java:获取屏幕输入字符串进行运算后返回结果

SaveOperate.java:保存计算历史到本地

UploadOperate.java:上传计算历史到服务器

Main.java: main函数所在，调用整个工程

4.编码实现

工具:Eclipse

环境：jse1.8

人员：我

耗时：数十小时

经历：小问题有些，debug很煎熬

结果：基本功能完成，保存功能完成，上传功能完成但未验证

5.测试纠错

每一个模块完成后都及时进行纠错处理，最后整体进行大量测试，对发现的错误进行纠正。发现错误包括：

输入限制逻辑错误

运算逻辑错误

异常监听错误

函数调用错误

经过鏖战，干掉bug!

三、实验结果

1.初始化界面

2.界面说明

2-1 显示部分

屏幕区域由上到下分为三个区域，依次显示：

提示信息：正常显示“Let’sROCK”，发生错误提示错误信息，及其他操作信息

上次运算历史：如图“sin(2.5*pi)=1”

本次运算结果：如图“1.0”

2-2控制部分

控制部分整体采用Gridlayout布局进行排列：按钮布局仿照红米1s的计算器

3.结果演示

3-1 单目运算

3-4错误演示

3-5保存本地操作结果

注意：采用特定输入序列(88224466!!^^)启动操作

3-6上传服务器操作演示

注意：采用特定输入序列(82824646!^!^)启动操作

4.总结结果

基本功能堪称完美，经大量测试不再有未知错误发生，已发现bug已经全部解决

上传操作发送数据报报文，时间原因来不及测试了

保存本地操作没有任何问题，测试结果良好

四、总结分析

通过本次实验，发现了平时许多没有发现的问题。首先此前没有学过java，上课时学到的知识在课后没能及时复习回顾，遗漏了一些很小但是却致命的问题，幸而在本次实验中及时发现，亡羊补牢，结果还大体满意。

理论学习固然重要，实际应用也必不可少，在实践中把学过的知识应用出来才能最大程

度的加深自己的学习理解程度，也可以将自己平时没有注意到的错误即使解决掉。

最后，感谢老师的教导！

五、实验代码

1.gui包

GUI.java

package com.lzj.caculator_javaexp.gui;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Panel;

import java.awt.Toolkit;

import javax.swing.ImageIcon;

import javax.swing.JFrame;

public class GUI extends JFrame{//图形化界面

private int midScreenX;//屏幕中心点x

private int midScreenY;//屏幕中心点y

private final int windowWidth = 320;//窗口宽度

private final int windowHeight = 480;//窗口高度

private final int dispPanelX = 10;

private final int dispPanelY = 10;

private final int dispPanelWidth = 300;

private final int dispPanelHeight = 165;

private final int ctrlPanelX = 20;

private final int ctrlPanelY = 185;

private final int ctrlPanelWidth = 280;

private final int ctrlPanelHeight = 275;

public GUI() {

// TODO Auto-generated constructor stub

ImageIcon icon = new ImageIcon("res/icon.png");//设定图标

setIconImage(icon.getImage());

setTitle("计算器Beta1.0");

setBounds();//调用自定义函数设定边界

setContent();//调用自定义函数设定内容

setResizable(false);

// setUndecorated(true);

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

//自定义setBounds,使窗口位于屏幕中央

private void setBounds(){

Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

midScreenX = (int) (screenSize.getWidth()/2);

midScreenY = (int) (screenSize.getHeight()/2);

//有边框,保持内部大小故在宽度高度上补全

setBounds(midScreenX - windowWidth/2, midScreenY - windowHeight/2, windowWidth + 6, windowHeight + 29);

}

private void setContent(){

setLayout(null);

//面板

Panel panel = new Panel(null);

panel.setBounds(0, 0, windowWidth, windowHeight);

panel.setBackground(new Color(51, 51, 51));//整体颜色,仿计算器

add(panel);

//显示面板

DispPanel dispPanel = new DispPanel(dispPanelWidth,dispPanelHeight);

dispPanel.setBounds(dispPanelX, dispPanelY, dispPanelWidth, dispPanelHeight);

panel.add(dispPanel);

//控制面板

CtrlPanel ctrlPanel = new CtrlPanel(ctrlPanelWidth,ctrlPanelWidth);

ctrlPanel.setBounds(ctrlPanelX, ctrlPanelY, ctrlPanelWidth, ctrlPanelHeight);

panel.add(ctrlPanel);

}

}

DispPanel.java

package com.lzj.caculator_javaexp.gui;

import java.awt.Color;

import java.awt.Font;

import java.awt.Panel;

import com.lzj.caculator_https://www.360docs.net/doc/fb5036600.html,ponent.MyTextField;

public class DispPanel extends Panel{//显示面板类

public static MyTextField showHintInfo_TextField;

public static MyTextField lastCaculation_TextField;

public static MyTextField currentCaculation_TextField;

public DispPanel(int width,int height) {

// TODO Auto-generated constructor stub

setBackground(new Color(204, 255, 204));//仿屏幕颜色

setLayout(null);

//操作提示信息

showHintInfo_TextField = new MyTextField();

showHintInfo_TextField.setBounds(0, 0, width, height/4);

showHintInfo_TextField.setFont(new Font(null, Font.PLAIN, 16));

showHintInfo_TextField.setText("Let's ROCK");

add(showHintInfo_TextField);

//上次运算

lastCaculation_TextField = new MyTextField();

lastCaculation_TextField.setBounds(5, height/4, width-10, height/4);

lastCaculation_TextField.setFont(new Font(null, Font.PLAIN, 16));

lastCaculation_TextField.setText("");

add(lastCaculation_TextField);

//本次运算

currentCaculation_TextField = new MyTextField();

currentCaculation_TextField.setBounds(5, height/2, width-10, height/2);

currentCaculation_TextField.setFont(new Font(null, Font.PLAIN, 32));

currentCaculation_TextField.setText("0");

add(currentCaculation_TextField);

}

}

CtrlPanel.java

package com.lzj.caculator_javaexp.gui;

import java.awt.GridLayout;

import java.awt.Panel;

import com.lzj.caculator_https://www.360docs.net/doc/fb5036600.html,ponent.MyButton; public class CtrlPanel extends Panel{

public CtrlPanel(int width,int height) {

// TODO Auto-generated constructor stub

setLayout(new GridLayout(6, 5));

add(new MyButton("!"));

add(new MyButton("^"));

add(new MyButton("√"));

add(new MyButton("π"));

add(new MyButton("C"));

add(new MyButton("sin"));

add(new MyButton("("));

add(new MyButton(")"));

add(new MyButton("e"));

add(new MyButton("←"));

add(new MyButton("cos"));

add(new MyButton("7"));

add(new MyButton("8"));

add(new MyButton("9"));

add(new MyButton("÷"));

add(new MyButton("tan"));

add(new MyButton("4"));

add(new MyButton("5"));

add(new MyButton("6"));

add(new MyButton("×"));

add(new MyButton("ln"));

add(new MyButton("1"));

add(new MyButton("2"));

add(new MyButton("3"));

add(new MyButton("-"));

add(new MyButton("log"));

add(new MyButton("0"));

add(new MyButton("."));

add(new MyButton("="));

add(new MyButton("+"));

}

}

https://www.360docs.net/doc/fb5036600.html,ponent包

MyButton.java

package com.lzj.caculator_https://www.360docs.net/doc/fb5036600.html,ponent;

import java.awt.Color;

import java.awt.Font;

import javax.swing.JButton;

import com.lzj.caculator_javaexp.actionlistener.MyButtonActionListener; public class MyButton extends JButton{

public MyButton(String str) {

// TODO Auto-generated constructor stub

new JButton();

setText(str);

if(str.equals("=")){

setBackground(new Color(255, 102, 00));

}

setFont(new Font(null, Font.PLAIN, 16));

setFocusPainted(false);

addActionListener(new MyButtonActionListener());

}

}

MyTestField.java

package com.lzj.caculator_https://www.360docs.net/doc/fb5036600.html,ponent;

import javax.swing.JTextField;

public class MyTextField extends JTextField {

public MyTextField() {// 自定义JTextField类

new JTextField();

setEditable(false);

setBackground(null);

setBorder(null);

setHorizontalAlignment(JTextField.RIGHT);

}

public void append(String str) {// 追加字符串

String string = getText();

setText(string+str);

if( string.length()==0){

setText(str);

}else{

if (string.charAt(string.length() - 1) == '0' && !str.equals(".")) {// 末尾为"0"且不是追加"."

if (string.length() == 1) {// 只有一个"0"

string = "";

} else if (string.charAt(string.length() - 2) < '1' && string.charAt(string.length() - 2) > '9') {// "0"之前不是数字

string = string.substring(0, string.length() - 1);

}

}

setText(string + str);

}

}

public void removeEnd() {// 删除最后一个字符

String string = getText();

if (string.length() <= 1) {

setText("0");

} else {

setText(string.substring(0, string.length() - 1));

}

}

}

3.actionlistener包

MyButtonActionListener.java

package com.lzj.caculator_javaexp.actionlistener;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import com.lzj.caculator_https://www.360docs.net/doc/fb5036600.html,ponent.MyButton;

import com.lzj.caculator_javaexp.gui.DispPanel;

import com.lzj.caculator_javaexp.operation.ArithmeticLogic;

import com.lzj.caculator_javaexp.operation.SaveOperate;

import com.lzj.caculator_javaexp.operation.UploadOperate;

public class MyButtonActionListener implements ActionListener {

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

String string = ((MyButton) e.getSource()).getText();// 按钮上的文本

switch (string) {// 各个按钮的功能

// 直接在最后面追加本次输入

case "0":

case "1":

case "2":

case "3":

case "4":

case "5":

case "6":

case "7":

case "8":

case "9":

case "π":

case "e":

case "!":

case "^":

case "(":

case ")":

DispPanel.currentCaculation_TextField.append(string);

break;

// 后跟一个"("

case "√":

case "sin":

case "cos":

case "tan":

case "ln":

case "log":