达拉草201771010105《面向对象程序设计（java）》第十五周学习总结

达拉草201771010105《面向对象程序设计（java）》第十四周学习总结

第一部分：理论知识

JAR文件：

1.Java程序的打包：程序编译完成后，程序员将.class文件压缩打包为.jar文件后，GUI界面程序就可以直接双击图标运行。

2..jar文件（Java归档）既可以包含类文件，也可以包含诸如图像和声音这些其它类型的文件。

3.JAR文件是压缩的，它使用ZIP压缩格式。

jar命令：

jar命令格式： jar {ctxui} [vfm0Me] [jar-file] [manifest-file] [entry-point] [-C dir] files ...

(1) 创建JAR文件

jar cf jar-file input-file(s) c---want to Create a JAR file.

(2) 查看JAR文件

jar tf jar-file t---want to view the Table of contents of the JAR file.

(3) 提取JAR文件

jar xf jar-file [archived-file(s)] x---want to extract files from the JAR archive.

(4) 更新JAR文件

jar uf jar-file input-file(s) u---want to update an existing JAR file.

(5) 索引JAR文件

jar i jar-file i---index an existing JAR file.

清单文件:

每个JAR文件中包含一个用于描述归档特征的清单文件(manifest)。清单文件被命名为MANIFEST.MF，它位于JAR文件的一个特殊的META-INF子目录中。

清单文件的节与节之间用空行分开，最后一行必须以换行符结束。否则，清单文件将无法被正确地读取。

运行JAR文件

1.用户可以通过下面的命令来启动应用程序： java –jar MyProgram.jar.

2.窗口操作系统，可通过双击JAR文件图标来启动应用程序。

资源：

Java中，应用程序使用的类通常需要一些相关的数据文件，这些文件称为资源(Resource)。

（1）图像和声音文件。

（2）带有消息字符串和按钮标签的文本文件。

(3) 二进制数据文件，如：描述地图布局的文件。

编译、创建JAR文件和执行这个程序的命令如下：

– javac ResourceTest.java

– jar cvfm ResourceTest.jar ResourceTest.mf *.class *.gif *.txt – java –jar ResourceTest.jar

Eclipse导出JAR文件:

(1)工程没有引用外部jar包时，直接导出。
(2)当工程引用了其他的外部jar时，由于Eclipse 不支持同时导出外部jar包的功能，导出过程比较复杂。

Java Web Start：

（1）Java Web Start是一个用Java编写的应用程序，它是Sun 公司推出的一项在Internet上发布应用程序的技术；

（2）通过Java Web Start可以使一个应用程序很容易地通过 web部署在各个平台上，包括Windows，Linux，Solaris等。

实验十五 GUI编程练习与应用程序部署

实验时间 2018-12-6

1、实验目的与要求

(1) 掌握Java应用程序的打包操作；

(2) 了解应用程序存储配置信息的两种方法；

(3) 掌握基于JNLP协议的java Web Start应用程序的发布方法；

(5) 掌握Java GUI 编程技术。

2、实验内容和步骤

实验1： 导入第13章示例程序，测试程序并进行代码注释。

测试程序1

l 在elipse IDE中调试运行教材585页程序13-1，结合程序运行结果理解程序；

l 将所生成的JAR文件移到另外一个不同的目录中，再运行该归档文件，以便确认程序是从JAR文件中，而不是从当前目录中读取的资源。

l 掌握创建JAR文件的方法；

 1 package resource;
 2 
 3 import java.awt.*;
 4 import java.io.*;
 5 import java.net.*;
 6 import java.util.*;
 7 import javax.swing.*;
 8 
 9 /**
10  * @version 1.41 2015-06-12
11  * @author Cay Horstmann
12  */
13 public class ResourceTest
14 {
15    public static void main(String[] args)
16    {
17       EventQueue.invokeLater(() -> {
18          JFrame frame = new ResourceTestFrame();
19          frame.setTitle("ResourceTest");
20          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
21          frame.setVisible(true);
22       });
23    }
24 }
25 
26 /**
27  * A frame that loads image and text resources.
28  */
29 class ResourceTestFrame extends JFrame
30 {
31    private static final int DEFAULT_WIDTH = 300;
32    private static final int DEFAULT_HEIGHT = 300;
33 
34    public ResourceTestFrame()
35    {
36       setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
37       URL aboutURL = getClass().getResource("about.gif");
38       Image img = new ImageIcon(aboutURL).getImage();//根据指定的 URL 创建一个 ImageIcon
39       setIconImage(img);//设置要作为此窗口图标显示的图像。
40 
41       JTextArea textArea = new JTextArea();//创建新的 TextArea
42       InputStream stream = getClass().getResourceAsStream("about.txt");//查找具有给定名称的资源。
43       try (Scanner in = new Scanner(stream, "UTF-8"))
44       {
45          while (in.hasNext())
46             textArea.append(in.nextLine() + "\n");
47          //将给定文本追加到文档结尾。如果模型为 null 或者字符串为 null 或空，则不执行任何操作。 
48       }
49       add(textArea);
50    }
51 }

运行结果如下：

测试程序2

l 在elipse IDE中调试运行教材583页-584程序13-2，结合程序运行结果理解程序；

l 了解Properties类中常用的方法；

  1 package properties;
  2 
  3 import java.awt.EventQueue;
  4 import java.awt.event.*;
  5 import java.io.*;
  6 import java.util.Properties;
  7 
  8 import javax.swing.*;
  9 
 10 /**
 11  * A program to test properties. The program remembers the frame position, size,
 12  * and title.
 13  * @version 1.01 2015-06-16
 14  * @author Cay Horstmann
 15  */
 16 public class PropertiesTest
 17 {
 18    public static void main(String[] args)
 19    {
 20       EventQueue.invokeLater(() -> {
 21          PropertiesFrame frame = new PropertiesFrame();
 22          frame.setVisible(true);
 23       });
 24    }
 25 }
 26 
 27 /**
 28  * A frame that restores position and size from a properties file and updates
 29  * the properties upon exit.
 30  */
 31 class PropertiesFrame extends JFrame
 32 {
 33    private static final int DEFAULT_WIDTH = 300;
 34    private static final int DEFAULT_HEIGHT = 200;
 35 
 36    private File propertiesFile;
 37    private Properties settings;
 38 
 39    public PropertiesFrame()
 40    {
 41      // 从属性中获取位置、大小和标题
 42 
 43 
 44       String userDir = System.getProperty("user.home");
 45       File propertiesDir = new File(userDir, ".corejava");
 46       if (!propertiesDir.exists()) propertiesDir.mkdir();
 47       propertiesFile = new File(propertiesDir, "program.properties");
 48 
 49       Properties defaultSettings = new Properties();
 50       defaultSettings.setProperty("left", "0");
 51       defaultSettings.setProperty("top", "0");
 52       defaultSettings.setProperty("width", "" + DEFAULT_WIDTH);
 53       defaultSettings.setProperty("height", "" + DEFAULT_HEIGHT);
 54       defaultSettings.setProperty("title", "");
 55 
 56       settings = new Properties(defaultSettings);
 57 
 58       if (propertiesFile.exists()) 
 59          try (InputStream in = new FileInputStream(propertiesFile))
 60          {         
 61             settings.load(in);
 62          }
 63          catch (IOException ex)
 64          {
 65             ex.printStackTrace();
 66          }
 67 
 68       int left = Integer.parseInt(settings.getProperty("left"));
 69       int top = Integer.parseInt(settings.getProperty("top"));
 70       int width = Integer.parseInt(settings.getProperty("width"));
 71       int height = Integer.parseInt(settings.getProperty("height"));
 72       setBounds(left, top, width, height);
 73 
 74       // 如果没有标题，询问用户
 75 
 76 
 77       String title = settings.getProperty("title");
 78       if (title.equals(""))//将此字符串与指定的对象比较。
 79          title = JOptionPane.showInputDialog("Please supply a frame title:");
 80       if (title == null) title = "";
 81       setTitle(title);
 82       //添加指定的窗口侦听器，以从此窗口接收窗口事件。
 83       addWindowListener(new WindowAdapter()
 84       {
 85          public void windowClosing(WindowEvent event)
 86          {
 87             settings.setProperty("left", "" + getX());
 88             settings.setProperty("top", "" + getY());
 89             settings.setProperty("width", "" + getWidth());
 90             settings.setProperty("height", "" + getHeight());
 91             settings.setProperty("title", getTitle());
 92             try (OutputStream out = new FileOutputStream(propertiesFile))//创建一个向指定 File 对象表示的文件中写入数据的文件输出流。
 93             {
 94                settings.store(out, "Program Properties");
 95             }
 96             catch (IOException ex)
 97             {
 98                ex.printStackTrace();
 99             }
100             System.exit(0);//终止当前正在运行的 Java 虚拟机。
101          }
102       });
103    }
104 }

运行结果如下：

测试程序3

l 在elipse IDE中调试运行教材593页-594程序13-3，结合程序运行结果理解程序；

l 了解Preferences类中常用的方法；

  1 package preferences;
  2 
  3 import java.awt.*;
  4 import java.io.*;
  5 import java.util.prefs.*;
  6 
  7 import javax.swing.*;
  8 import javax.swing.filechooser.*;
  9 
 10 /**
 11  * A program to test preference settings. The program remembers the frame
 12  * position, size, and title.
 13  * @version 1.03 2015-06-12
 14  * @author Cay Horstmann
 15  */
 16 public class PreferencesTest
 17 {
 18    public static void main(String[] args)
 19    {
 20       EventQueue.invokeLater(() -> {
 21          PreferencesFrame frame = new PreferencesFrame();
 22          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 23          frame.setVisible(true);
 24       });
 25    }
 26 }
 27 
 28 /**
 29  * A frame that restores position and size from user preferences and updates the
 30  * preferences upon exit.
 31  */
 32 class PreferencesFrame extends JFrame
 33 {
 34    private static final int DEFAULT_WIDTH = 300;
 35    private static final int DEFAULT_HEIGHT = 200;
 36    private Preferences root = Preferences.userRoot();
 37    private Preferences node = root.node("/com/horstmann/corejava");
 38 
 39    public PreferencesFrame()
 40    {
 41       // 从偏好获得位置、大小、标题
 42 
 43       int left = node.getInt("left", 0);
 44       int top = node.getInt("top", 0);
 45       int width = node.getInt("width", DEFAULT_WIDTH);
 46       int height = node.getInt("height", DEFAULT_HEIGHT);
 47       setBounds(left, top, width, height);
 48 
 49       // 如果没有标题，请询问用户
 50 
 51       String title = node.get("title", "");
 52       if (title.equals(""))
 53          title = JOptionPane.showInputDialog("Please supply a frame title:");
 54          //显示请求用户输入的问题消息对话框。
 55       if (title == null) title = "";
 56       setTitle(title);
 57 
 58       // 设置显示XML文件的文件选择器
 59 
 60       final JFileChooser chooser = new JFileChooser();
 61       chooser.setCurrentDirectory(new File("."));//设置当前目录
 62       chooser.setFileFilter(new FileNameExtensionFilter("XML files", "xml"));
 63       //使用指定的描述和文件扩展名创建一个 FileNameExtensionFilter
 64 
 65       // 设置菜单
 66 
 67       JMenuBar menuBar = new JMenuBar();//创建菜单栏
 68       setJMenuBar(menuBar);//设置此窗体的菜单栏。 
 69       JMenu menu = new JMenu("File");//构造一个新 JMenu，用提供的字符串作为其文本。 
 70       menuBar.add(menu);
 71 
 72       JMenuItem exportItem = new JMenuItem("Export preferences");
 73       menu.add(exportItem);
 74       exportItem
 75             .addActionListener(event -> { 
 76                if (chooser.showSaveDialog(PreferencesFrame.this) == JFileChooser.APPROVE_OPTION)
 77                {
 78                   try
 79                   {
 80                      savePreferences();
 81                      OutputStream out = new FileOutputStream(chooser
 82                            .getSelectedFile());
 83                      node.exportSubtree(out);
 84                      out.close();
 85                   }
 86                   catch (Exception e)
 87                   {
 88                      e.printStackTrace();
 89                   }
 90                }
 91             });
 92 
 93       JMenuItem importItem = new JMenuItem("Import preferences");
 94       menu.add(importItem);
 95       importItem
 96             .addActionListener(event -> {
 97                if (chooser.showOpenDialog(PreferencesFrame.this) == JFileChooser.APPROVE_OPTION)
 98                {//JFileChooser 为用户选择文件提供了一种简单的机制。
 99                   try
100                   {
101                      InputStream in = new FileInputStream(chooser
102                            .getSelectedFile());
103                      Preferences.importPreferences(in);
104                      in.close();
105                   }
106                   catch (Exception e)
107                   {
108                      e.printStackTrace();
109                   }
110                }
111             });
112 
113       JMenuItem exitItem = new JMenuItem("Exit");
114       menu.add(exitItem);
115       exitItem.addActionListener(event -> {
116          savePreferences();
117          System.exit(0);
118       });
119    }
120    
121    public void savePreferences() 
122    {
123       node.putInt("left", getX());
124       node.putInt("top", getY());
125       node.putInt("width", getWidth());
126       node.putInt("height", getHeight());
127       node.put("title", getTitle());      
128    }
129 }

运行结果如下：

测试程序4

l 在elipse IDE中调试运行教材619页-622程序13-6，结合程序运行结果理解程序；

l 掌握基于JNLP协议的java Web Start应用程序的发布方法。

  1 package webstart;
  2 
  3 import java.awt.*;
  4 import java.awt.event.*;
  5 import javax.swing.*;
  6 import javax.swing.text.*;
  7 
  8 /**
  9    A panel with calculator buttons and a result display.
 10 */
 11 public class CalculatorPanel extends JPanel
 12 {  
 13    private JTextArea display;
 14    private JPanel panel;
 15    private double result;
 16    private String lastCommand;
 17    private boolean start;
 18 
 19    /**
 20       Lays out the panel.
 21    */
 22    public CalculatorPanel()
 23    {  
 24       setLayout(new BorderLayout());
 25 
 26       result = 0;
 27       lastCommand = "=";
 28       start = true;
 29       
 30       // 添加显示
 31 
 32       display = new JTextArea(10, 20);
 33 
 34       add(new JScrollPane(display), BorderLayout.NORTH);
 35       
 36       ActionListener insert = new InsertAction();
 37       ActionListener command = new CommandAction();
 38 
 39       // 在4×4网格中添加按钮
 40 
 41       panel = new JPanel();
 42       panel.setLayout(new GridLayout(4, 4));
 43 
 44       addButton("7", insert);
 45       addButton("8", insert);
 46       addButton("9", insert);
 47       addButton("/", command);
 48 
 49       addButton("4", insert);
 50       addButton("5", insert);
 51       addButton("6", insert);
 52       addButton("*", command);
 53 
 54       addButton("1", insert);
 55       addButton("2", insert);
 56       addButton("3", insert);
 57       addButton("-", command);
 58 
 59       addButton("0", insert);
 60       addButton(".", insert);
 61       addButton("=", command);
 62       addButton("+", command);
 63 
 64       add(panel, BorderLayout.CENTER);
 65    }
 66 
 67    /**
 68       Gets the history text.
 69       @return the calculator history
 70    */
 71    public String getText()
 72    {
 73       return display.getText();
 74    }
 75    
 76    /**
 77       Appends a string to the history text.
 78       @param s the string to append
 79    */
 80    public void append(String s)
 81    {
 82       display.append(s);
 83    }
 84 
 85    /**
 86       Adds a button to the center panel.
 87       @param label the button label
 88       @param listener the button listener
 89    */
 90    private void addButton(String label, ActionListener listener)
 91    {  
 92       JButton button = new JButton(label);
 93       button.addActionListener(listener);
 94       panel.add(button);
 95    }
 96 
 97    /**
 98       This action inserts the button action string to the
 99       end of the display text.
100    */
101    private class InsertAction implements ActionListener
102    {
103       public void actionPerformed(ActionEvent event)
104       {
105          String input = event.getActionCommand();
106          start = false;
107          display.append(input);
108       }
109    }
110 
111    /**
112       This action executes the command that the button
113       action string denotes.
114    */
115    private class CommandAction implements ActionListener
116    {
117       public void actionPerformed(ActionEvent event)
118       {  
119          String command = event.getActionCommand();
120 
121          if (start)
122          {  
123             if (command.equals("-")) 
124             { 
125                display.append(command); 
126                start = false; 
127             }
128             else 
129                lastCommand = command;
130          }
131          else
132          {  
133             try
134             {
135                int lines = display.getLineCount();
136                int lineStart = display.getLineStartOffset(lines - 1);
137                int lineEnd = display.getLineEndOffset(lines - 1);
138                String value = display.getText(lineStart, lineEnd - lineStart);
139                display.append(" ");
140                display.append(command); 
141                calculate(Double.parseDouble(value));
142                if (command.equals("="))
143                   display.append("\n" + result);
144                lastCommand = command;
145                display.append("\n");
146                start = true;
147             }
148             catch (BadLocationException e)
149             {
150                e.printStackTrace();
151             }
152          }
153       }
154    }
155 
156    /**
157       Carries out the pending calculation. 
158       @param x the value to be accumulated with the prior result.
159    */
160    public void calculate(double x)
161    {
162       if (lastCommand.equals("+")) result += x;
163       else if (lastCommand.equals("-")) result -= x;
164       else if (lastCommand.equals("*")) result *= x;
165       else if (lastCommand.equals("/")) result /= x;
166       else if (lastCommand.equals("=")) result = x;
167    }  
168 }

  1 package webstart;
  2 
  3 import java.io.BufferedReader;
  4 import java.io.ByteArrayInputStream;
  5 import java.io.ByteArrayOutputStream;
  6 import java.io.FileNotFoundException;
  7 import java.io.IOException;
  8 import java.io.InputStream;
  9 import java.io.InputStreamReader;
 10 import java.io.OutputStream;
 11 import java.io.PrintStream;
 12 import java.net.MalformedURLException;
 13 import java.net.URL;
 14 
 15 import javax.jnlp.BasicService;
 16 import javax.jnlp.FileContents;
 17 import javax.jnlp.FileOpenService;
 18 import javax.jnlp.FileSaveService;
 19 import javax.jnlp.PersistenceService;
 20 import javax.jnlp.ServiceManager;
 21 import javax.jnlp.UnavailableServiceException;
 22 import javax.swing.JFrame;
 23 import javax.swing.JMenu;
 24 import javax.swing.JMenuBar;
 25 import javax.swing.JMenuItem;
 26 import javax.swing.JOptionPane;
 27 
 28 /**
 29  * A frame with a calculator panel and a menu to load and save the calculator history.
 30  */
 31 public class CalculatorFrame extends JFrame
 32 {
 33    private CalculatorPanel panel;
 34 
 35    public CalculatorFrame()
 36    {
 37       setTitle();
 38       panel = new CalculatorPanel();
 39       add(panel);
 40 
 41       JMenu fileMenu = new JMenu("File");
 42       JMenuBar menuBar = new JMenuBar();
 43       menuBar.add(fileMenu);
 44       setJMenuBar(menuBar);
 45 
 46       JMenuItem openItem = fileMenu.add("Open");
 47       openItem.addActionListener(event -> open());
 48       JMenuItem saveItem = fileMenu.add("Save");
 49       saveItem.addActionListener(event -> save());
 50       
 51       pack();
 52    }
 53 
 54    /**
 55     * Gets the title from the persistent store or asks the user for the title if there is no prior
 56     * entry.
 57     */
 58    public void setTitle()
 59    {
 60       try
 61       {
 62          String title = null;
 63 
 64          BasicService basic = (BasicService) ServiceManager.lookup("javax.jnlp.BasicService");
 65          URL codeBase = basic.getCodeBase();
 66 
 67          PersistenceService service = (PersistenceService) ServiceManager
 68                .lookup("javax.jnlp.PersistenceService");
 69          URL key = new URL(codeBase, "title");
 70 
 71          try
 72          {
 73             FileContents contents = service.get(key);
 74             InputStream in = contents.getInputStream();
 75             BufferedReader reader = new BufferedReader(new InputStreamReader(in));
 76             title = reader.readLine();
 77          }
 78          catch (FileNotFoundException e)
 79          {
 80             title = JOptionPane.showInputDialog("Please supply a frame title:");
 81             if (title == null) return;
 82 
 83             service.create(key, 100);
 84             FileContents contents = service.get(key);
 85             OutputStream out = contents.getOutputStream(true);
 86             PrintStream printOut = new PrintStream(out);
 87             printOut.print(title);
 88          }
 89          setTitle(title);
 90       }
 91       catch (UnavailableServiceException | IOException e)
 92       {
 93          JOptionPane.showMessageDialog(this, e);
 94       }
 95    }
 96 
 97    /**
 98     * Opens a history file and updates the display.
 99     */
100    public void open()
101    {
102       try
103       {
104          FileOpenService service = (FileOpenService) ServiceManager
105                .lookup("javax.jnlp.FileOpenService");
106          FileContents contents = service.openFileDialog(".", new String[] { "txt" });
107 
108          JOptionPane.showMessageDialog(this, contents.getName());//调出标题为 "Message" 的信息消息对话框。 
109          if (contents != null)
110          {
111             InputStream in = contents.getInputStream();
112             BufferedReader reader = new BufferedReader(new InputStreamReader(in));
113             String line;
114             while ((line = reader.readLine()) != null)
115             {
116                panel.append(line);
117                panel.append("\n");
118             }
119          }
120       }
121       catch (UnavailableServiceException e)
122       {
123          JOptionPane.showMessageDialog(this, e);
124       }
125       catch (IOException e)
126       {
127          JOptionPane.showMessageDialog(this, e);
128       }
129    }
130 
131    /**
132     * Saves the calculator history to a file.
133     */
134    public void save()
135    {
136       try
137       {
138          ByteArrayOutputStream out = new ByteArrayOutputStream();
139          PrintStream printOut = new PrintStream(out);
140          printOut.print(panel.getText());
141          InputStream data = new ByteArrayInputStream(out.toByteArray());
142          FileSaveService service = (FileSaveService) ServiceManager
143                .lookup("javax.jnlp.FileSaveService");
144          service.saveFileDialog(".", new String[] { "txt" }, data, "calc.txt");
145       }
146       catch (UnavailableServiceException e)
147       {
148          JOptionPane.showMessageDialog(this, e);
149       }
150       catch (IOException e)
151       {
152          JOptionPane.showMessageDialog(this, e);
153       }
154    }
155 }

 1 package webstart;
 2 
 3 import java.awt.*;
 4 import javax.swing.*;
 5 
 6 /**
 7  * A calculator with a calculation history that can be deployed as a Java Web Start application.
 8  * @version 1.04 2015-06-12
 9  * @author Cay Horstmann
10  */
11 public class Calculator
12 {
13    public static void main(String[] args)
14    {
15       EventQueue.invokeLater(() ->             {
16                CalculatorFrame frame = new CalculatorFrame();
17                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
18                frame.setVisible(true);
19          });
20    }
21 }

实验2：GUI综合编程练习

按实验十四分组名单，组内讨论完成以下编程任务：

练习1：采用GUI界面设计以下程序，并进行部署与发布：

l 编制一个程序，将身份证号.txt 中的信息读入到内存中；

l 按姓名字典序输出人员信息；

l 查询最大年龄的人员信息；

l 查询最小年龄人员信息；

l 输入你的年龄，查询身份证号.txt中年龄与你最近人的姓名、身份证号、年龄、性别和出生地；

l 查询人员中是否有你的同乡。

l 输入身份证信息，查询所提供身份证号的人员信息，要求输入一个身份证数字时，查询界面就显示满足查询条件的查询结果，且随着输入的数字的增多，查询匹配的范围逐渐缩小。

  1 package 身份证;
  2 import java.io.BufferedReader;
  3 
  4 import java.io.FileNotFoundException;
  5 import java.io.FileReader;
  6 import java.io.IOException;
  7 import java.util.ArrayList;
  8 //import java.util.Arrays;
  9 import java.util.Collections;
 10 import java.util.Scanner;
 11 import java.util.TimerTask;
 12 
 13 //import java.awt.*;
 14 import javax.swing.*;
 15 import java.awt.event.*;
 16 
 17 public class Main extends JFrame {
 18     private static ArrayList studentlist;
 19     private static ArrayList<Student> list;
 20     private JPanel buttonPanel;
 21  //   private JPanel panel;
 22     
 23     Scanner scanner = new Scanner(System.in);
 24    
 25     public Main() {
 26          studentlist = new ArrayList<>();
 27            
 28             
 29    //    Timer timer=new Timer();
 30          JTextArea jt = new JTextArea();
 31          jt.setBounds(520, 100, 800, 600);
 32          buttonPanel = new JPanel();
 33        
 34          JButton jButton = new JButton("1.字典排序：");
 35          JButton jButton1 = new JButton("2.年龄最大和年龄最小：");
 36          JLabel lab = new JLabel("3.猜猜你的老乡：");
 37          JTextField jt1 = new JTextField();
 38          JLabel lab1 = new JLabel("4.找找同龄人（年龄相近）：");
 39          JTextField jt2 = new JTextField();
 40          JLabel lab2 = new JLabel("5.输入你的身份证号码：");
 41          JTextField jt3 = new JTextField();
 42          JButton jButton2 = new JButton("6.退出");
 43          buttonPanel. setLayout(null);
 44          jButton.setBounds(50, 160, 100, 30);
 45          jButton1.setBounds(50, 220, 160, 30);
 46          lab2.setBounds(50, 400, 100, 30);
 47          lab.setBounds(50, 280, 150, 30);
 48          jt1.setBounds(150, 280, 100, 30);
 49          lab1.setBounds(50, 340, 150, 30);
 50          jt2.setBounds(200, 340, 160, 30);
 51          jt3.setBounds(200, 400, 160, 30);
 52          jButton2.setBounds(50, 460, 60, 30);
 53          buttonPanel.add(jButton);
 54          buttonPanel.add(jButton1);
 55          buttonPanel.add(lab);
 56          buttonPanel.add(jt1);
 57          buttonPanel.add(lab1);
 58          buttonPanel.add(jt2);
 59          buttonPanel.add(lab2);
 60          buttonPanel.add(jt3);
 61          buttonPanel.add(jButton2);
 62          add(buttonPanel);
 63          buttonPanel.add(jt);
 64        
 65         try {
 66             
 67             BufferedReader in = new BufferedReader(new FileReader("身份证号.txt"));
 68             String temp = null;
 69             while ((temp = in.readLine()) != null) {
 70 
 71                 Scanner linescanner = new Scanner(temp);
 72 
 73                 linescanner.useDelimiter(" ");
 74                 String name = linescanner.next();
 75                 String number = linescanner.next();
 76                 String sex = linescanner.next();
 77                 String age = linescanner.next();
 78                 String province = linescanner.nextLine();
 79                 Student student = new Student();
 80                 student.setName(name);
 81                 student.setnumber(number);
 82                 student.setsex(sex);
 83                 int a = Integer.parseInt(age);
 84                 student.setage(a);
 85                 student.setprovince(province);
 86                 studentlist.add(student);
 87 
 88             }
 89         } catch (FileNotFoundException e) {
 90             System.out.println("学生信息文件找不到");
 91             e.printStackTrace();
 92         } catch (IOException e) {
 93             System.out.println("学生信息文件读取错误");
 94             e.printStackTrace();
 95         }
 96    
 97         
 98     jButton.addActionListener(new ActionListener() {
 99              
100           public void actionPerformed(ActionEvent e) {
101                  jt.setText(null);
102                 Collections.sort(studentlist);
103                jt.setText(studentlist.toString());
104                // jt.append(studentlist.toString());
105             }
106              
107         });
108         jButton1.addActionListener(new ActionListener() {
109             public void actionPerformed(ActionEvent e) {
110                 int max = 0, min = 100;
111                 int j, k1 = 0, k2 = 0;
112                 for (int i = 1; i < studentlist.size(); i++) {
113                     j = ((Student) studentlist.get(i)).getage();
114                     if (j > max) {
115                         max = j;
116                         k1 = i;
117                     }
118                     if (j < min) {
119                         min = j;
120                         k2 = i;
121                     }
122 
123                 }
124                 jt.setText("年龄最大：" + studentlist.get(k1) + "年龄最小：" + studentlist.get(k2));
125             }
126         });
127         jButton2.addActionListener(new ActionListener() {
128             public void actionPerformed(ActionEvent e) {
129                 dispose();
130                 System.exit(0);
131             }
132         });
133         jt1.addActionListener(new ActionListener() {
134             public void actionPerformed(ActionEvent e) {
135                 String find = jt1.getText();
136                 String text="";
137                 String place = find.substring(0, 3);
138                 for (int i = 0; i < studentlist.size(); i++) {
139                     if (((Student) studentlist.get(i)).getprovince().substring(1, 4).equals(place)) {
140                         text+="\n"+studentlist.get(i);
141                         jt.setText("老乡：" + text);
142                     }
143                 }
144             }
145         });
146         jt2.addActionListener(new ActionListener() {
147             public void actionPerformed(ActionEvent e) {
148                 String yourage = jt2.getText();
149                 int a = Integer.parseInt(yourage);
150                 int near = agenear(a);
151                 int value = a - ((Student) studentlist.get(near)).getage();
152                 jt.setText("年龄相近：" + studentlist.get(near));
153             }
154         });
155         jt3.addKeyListener(new KeyAdapter() {
156          
157            
158                 public void keyTyped(KeyEvent e) {
159                 list = new ArrayList<>();
160                 Collections.sort(studentlist);
161                 String key = jt3.getText();
162                 for (int i = 1; i < studentlist.size(); i++) {
163                     if (((Student) studentlist.get(i)).getnumber().contains(key)) {                        
164                         list.add((Student) studentlist.get(i));                        
165                         jt.setText("你可能是：\n" + list);
166                         
167                         
168                     }                    
169                 }
170             }
171 
172         });
173       
174       
175         
176         
177      
178     }
179 
180     public static int agenear(int age) {
181         int min = 53, value = 0, k = 0;
182         for (int i = 0; i < studentlist.size(); i++) {
183             value = ((Student) studentlist.get(i)).getage() - age;
184             if (value < 0)
185                 value = -value;
186             if (value < min) {
187                 min = value;
188                 k = i;
189             }
190         }
191         return k;
192     }
193    
194 
195     }

 1 package 身份证;
 2 import java.awt.*;
 3 import javax.swing.*;
 4  
 5 /**
 6  * @version 1.34 2015-06-12
 7  * @author Cay Horstmann
 8  */
 9 public class demo1
10 {
11    public static void main(String[] args)
12    {
13       EventQueue.invokeLater(() -> {
14          JFrame frame = new Main();
15          frame.setTitle("查询");
16          frame.setBounds(500, 50, 500, 500);
17          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
18          frame.setVisible(true);
19       });
20    }
21 }

 1 package 身份证;
 2 public  class Student  implements Comparable<Student> {
 3 
 4     private String name;
 5     private String number ;
 6     private String sex ;
 7     private int age;
 8     private String province;
 9    
10     public String getName() {
11         return name;
12     }
13     public void setName(String name) {
14         this.name = name;
15     }
16     public String getnumber() {
17         return number;
18     }
19     public void setnumber(String number) {
20         this.number = number;
21     }
22     public String getsex() {
23         return sex ;
24     }
25     public void setsex(String sex ) {
26         this.sex =sex ;
27     }
28     public int getage() {
29 
30         return age;
31         }
32         public void setage(int age) {
33            
34         this.age= age;
35         }
36 
37     public String getprovince() {
38         return province;
39     }
40     public void setprovince(String province) {
41         this.province=province ;
42     }
43 
44     public int compareTo(Student o) {
45        return this.name.compareTo(o.getName());
46     }
47 
48     public String toString() {
49         return  name+"\t"+sex+"\t"+age+"\t"+number+"\t"+province+"\n";
50     }
51     
52 }

运行结果如下：

练习2：采用GUI界面设计以下程序，并进行部署与发布

l 编写一个计算器类，可以完成加、减、乘、除的操作

l 利用计算机类，设计一个小学生100以内数的四则运算练习程序，由计算机随机产生10道加减乘除练习题，学生输入答案，由程序检查答案是否正确，每道题正确计10分，错误不计分，10道题测试结束后给出测试总分；

l 将程序中测试练习题及学生答题结果输出到文件，文件名为test.txt。

 1 package shiwuzhou;
 2 
 3 import java.awt.Dimension;
 4 import java.awt.EventQueue;
 5 import java.awt.Toolkit;
 6 
 7 import javax.swing.JFrame;
 8 
 9 public class New {
10 
11      public static void main (String args[])
12         {
13              Toolkit t=Toolkit.getDefaultToolkit();
14             Dimension s=t.getScreenSize(); 
15             EventQueue.invokeLater(() -> {
16                 JFrame frame = new Demo();
17                 frame.setBounds(0, 0,(int)s.getWidth()/2,(int)s.getHeight()/2);
18                 frame.setTitle("第七组");
19                 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
20                 frame.setVisible(true);
21              });        
22         }
23  
24 }

  1 package shiwuzhou;
  2 
  3 import java.awt.Font;
  4 import java.awt.event.ActionEvent;
  5 import java.awt.event.ActionListener;
  6 import java.io.FileNotFoundException;
  7 import java.io.PrintWriter;
  8 import java.util.Collections;
  9 import java.util.Scanner;
 10 
 11 import javax.swing.*;
 12 
 13 import java.math.*;
 14 
 15 
 16 public class Demo extends JFrame {
 17     
 18     private String[] c=new String[10];
 19     private String[] c1=new String[10];
 20     private int[] list=new int[10];
 21     int i=0,i1=0,sum = 0;
 22     private PrintWriter out = null;
 23     private JTextArea text,text1;
 24     private int counter;
 25     
 26     public Demo()  {
 27         JPanel Panel = new JPanel();
 28         Panel.setLayout(null);
 29         JLabel JLabel1=new JLabel("");
 30         JLabel1.setBounds(500, 800, 400, 30);
 31         JLabel1.setFont(new Font("Courier",Font.PLAIN,35));
 32         JButton Button = new JButton("生成题目");
 33         Button.setBounds(50,150,150,50);
 34         Button.setFont(new Font("Courier",Font.PLAIN,20)); 
 35         Button.addActionListener(new Action());
 36         JButton Button2 = new JButton("确定答案");
 37         Button2.setBounds(300,150,150,50);
 38         Button2.setFont(new Font("Courier",Font.PLAIN,20));
 39         Button2.addActionListener(new Action1());
 40         JButton Button3 = new JButton("读出文件");
 41         Button3.setBounds(500,150,150,50);
 42         Button3.setFont(new Font("Courier",Font.PLAIN,20));
 43         Button3.addActionListener(new Action2());
 44          text=new JTextArea(30,80);text.setBounds(30, 50, 200, 50);
 45          text.setFont(new Font("Courier",Font.PLAIN,35));
 46          text1=new JTextArea(30,80);
 47          text1.setBounds(270, 50, 200, 50);
 48          text1.setFont(new Font("Courier",Font.PLAIN,35));
 49 
 50          Panel.add(text);
 51          Panel.add(text1);
 52 
 53          Panel.add(Button);
 54          Panel.add(Button2);
 55          Panel.add(Button3);
 56          Panel.add(JLabel1);
 57          add(Panel);
 58          
 59          
 60          
 61 
 62 
 63            
 64                   
 65     }
 66     
 67     private class Action implements ActionListener
 68     {
 69     public void actionPerformed(ActionEvent event)
 70         {        
 71         text1.setText("0");
 72         if(i<10) {
 73         
 74         int a = 1+(int)(Math.random() * 99);
 75         int b = 1+(int)(Math.random() * 99);
 76         int m= (int) Math.round(Math.random() * 3);
 77       switch(m)
 78       {
 79       case 0:
 80           while(a<b){  
 81               b = (int) Math.round(Math.random() * 100);
 82               a = (int) Math.round(Math.random() * 100); 
 83           }  
 84           c[i]=(i+":"+a+"/"+b+"=");
 85           list[i]=Math.floorDiv(a, b);
 86           text.setText(i+":"+a+"/"+b+"=");
 87           i++;   
 88           break; 
 89       case 1:
 90           c[i]=(i+":"+a+"*"+b+"=");
 91                 list[i]=Math.multiplyExact(a, b);
 92                 text.setText(i+":"+a+"*"+b+"=");        
 93            i++;
 94           break;
 95        case 2:
 96           c[i]=(i+":"+a+"+"+b+"=");
 97                 list[i]=Math.addExact(a, b);
 98           text.setText(i+":"+a+"+"+b+"=");
 99           i++;
100           break ;
101       case 3:
102           while(a<=b){  
103               b = (int) Math.round(Math.random() * 100);
104               a = (int) Math.round(Math.random() * 100); 
105           }    
106           c[i]=(i+":"+a+"-"+b+"=");
107           text.setText(i+":"+a+"-"+b+"=");
108           list[i]=Math.subtractExact(a, b);
109           i++;
110           break ;
111           }
112         }
113       }
114     }      
115     private class Action1 implements ActionListener
116     {
117         public void actionPerformed(ActionEvent event)
118         {    
119             if(i<10) {
120                 text.setText(null);        
121                 String daan=text1.getText().toString().trim();
122                 int a = Integer.parseInt(daan);
123                 if(text1.getText()!="") {
124                     if(list[i1]==a) sum+=10;
125                 }        
126                 c1[i1]=daan;
127                 i1++; 
128             }
129         }
130     }      
131     
132 
133     private class Action2 implements ActionListener
134     {
135         public void actionPerformed(ActionEvent event)
136             {
137          
138             try {
139                 out = new PrintWriter("text.txt");
140             } catch (FileNotFoundException e) {
141             // TODO Auto-generated catch block
142                 e.printStackTrace();
143             }
144             for(int counter=0;counter<10;counter++)
145             {
146                 out.println(c[counter]+c1[counter]);
147             }
148             out.println("成绩"+sum);
149             out.close();
150 
151             }
152 
153     }   
154 }

运行结果如下：

实验总结：

在本周的学习中我们学了第十三章的部署应用知识，JRA文件的应用，它除了类文件，图像和其他资源外，还包含一个用用于描述归档特征的清单文件，通过验证实验测试，结合运行结果大概理解了本周的相关知识，比如属性，资源等。这周实验的难点就是最后的两个编程题，尤其是第一个编程的模糊查找。

posted on 2018-12-09 17:00 DLC 阅读(305) 评论(0) 编辑收藏举报

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达拉草201771010105《面向对象程序设计（java）》第十五周学习总结

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