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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

    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

    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;

    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。

    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() + "
    ");
    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

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

    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

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

    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

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

    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("
    " + result);
    144                lastCommand = command;
    145                display.append("
    ");
    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("
    ");
    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2GUI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+="
    "+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:
    " + 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+"	"+sex+"	"+age+"	"+number+"	"+province+"
    ";
    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。

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  • 原文地址:https://www.cnblogs.com/dalacao/p/10090259.html
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