201771010111李瑞紅《第十五週學習總結》

時間 2019-11-11

標籤第十五週學習總結简体版

原文原文鏈接

實驗十五 GUI編程練習與應用程序部署java

理論知識：node

1.jar文件web

a) java 程序的打包：編譯完成後，員將.class 文件壓縮打包爲 .jar 文件後， GUI 界面程序就能夠直接雙擊圖標運行。
b) jar .jar文件（ Java 歸檔）既可以包含類文件，也歸檔）既可以包含類文件，也以包含諸如圖像和聲音這些其它類型的文件。以包含諸如圖像和聲音這些其它類型的文件。以包含諸如圖像和聲音這些其它類型的文件。以包含諸如圖像和聲音這些其它類型的文件。
c) JAR 文件是壓縮的，它使用 ZIP 壓縮格式。壓縮格式。壓縮格式。壓縮格式。壓縮格式編程

1) jar命令服務器

a)jar命令格式：數據結構

jar {ctxu} [vfm0Me] jar-file] [manifest file] [entry -point] [-C dir ] files ...app

2）運行 JAR 文件框架

a) 用戶能夠經過下面的命令來啓動應程序：dom

java –jar MyProgram.jaride

b) 窗口操做系統，可經過雙擊 JAR 文件圖標來啓動應用程序。

2..資源

⚫ Java中，應用程序使用的類一般須要一些相關的數據文件，這些文件稱爲資源(Resource)。

–圖像和聲音文件。

–帶有消息字符串和按鈕標籤的文本文件。

–二進制數據文件，如：描述地圖佈局的文件。

⚫ 類加載器知道如何搜索類文件，直到在類路徑、存檔文件或Web服務器上找到爲止。

⚫ 利用資源機制對於非類文件也能夠進行一樣操做，具體步驟以下：

– 得到資源的Class對象。

– 若是資源是一個圖像或聲音文件，那麼就須要調用getresource(filename)得到資源的URL位置，而後利用getImage或getAudioClip方法進行讀取。

– 若是資源是文本或二進制文件，那麼就能夠使用getResouceAsStream方法讀取文件中的數據。

⚫ 資源文件能夠與類文件放在同一個目錄中，也能夠將資源文件放在其它子目錄中。具體有如下兩種方式：

–相對資源名：如data/text/about.txt它會被解釋爲相對於加載這個資源的類所在的包。

實驗時間 2018-12-6

1、實驗目的與要求

(1) 掌握；

(2) 瞭解應用程序存儲配置信息的兩種方法；

(3) 掌握基於JNLP協議的java Web Start應用程序的發佈方法；

(5) 掌握Java GUI 編程技術。

2、實驗內容和步驟

實驗1：導入第13章示例程序，測試程序並進行代碼註釋。

測試程序1

l 在elipse IDE中調試運行教材585頁程序13-1，結合程序運行結果理解程序；

l 將所生成的JAR文件移到另一個不一樣的目錄中，再運行該歸檔文件，以便確認程序是從JAR文件中，而不是從當前目錄中讀取的資源。

l 掌握建立JAR文件的方法；

package Resource;

import java.awt.*;
import java.io.*;
import java.net.*;
import java.util.*;
import javax.swing.*;

/**
 * @version 1.41 2015-06-12
 * @author Cay Horstmann
 */
public class ResourceTest
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(() -> {
         JFrame frame = new ResourceTestFrame();
         frame.setTitle("ResourceTest");//將此窗體的標題設置爲指定的字符串。 
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setVisible(true);//設置窗口的可見性
      });
   }
}

/**
 * A frame that loads image and text resources.
 */
class ResourceTestFrame extends JFrame
{
   private static final int DEFAULT_WIDTH = 300;
   private static final int DEFAULT_HEIGHT = 300;

   public ResourceTestFrame()
   {
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);//調整組件的大小，
      //利用about.gif圖像文件製做圖標
      URL aboutURL = getClass().getResource("about.gif");
      Image img = new ImageIcon(aboutURL).getImage();
      setIconImage(img);//設置要做爲此窗口圖標顯示的圖像。 

      JTextArea textArea = new JTextArea();//構造一個空的TextArea
      InputStream stream = getClass().getResourceAsStream("about.txt");//讀取about.txt文件
      try (Scanner in = new Scanner(stream, "UTF-8"))
      {
         while (in.hasNext())
            textArea.append(in.nextLine() + "\n");
      }
      add(textArea);

實驗結果

將所生成的JAR文件移到另一個不一樣的目錄中，雙擊圖標能夠運行。

實驗結果

測試程序2

l 在elipse IDE中調試運行教材583頁-584程序13-2，結合程序運行結果理解程序；

l 瞭解Properties類中經常使用的

package properties;

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.Properties;

import javax.swing.*;

/**
 * A program to test properties. The program remembers the frame position, size,
 * and title.
 * @version 1.01 2015-06-16
 * @author Cay Horstmann
 */
public class PropertiesTest
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(() -> {
          PropertiesFrame frame = new PropertiesFrame();
         frame.setVisible(true);
      });
   }
}

/**
 * A frame that restores position and size from a properties file and updates
 * the properties upon exit.
 */
class PropertiesFrame extends JFrame
{
   private static final int DEFAULT_WIDTH = 300;
   private static final int DEFAULT_HEIGHT = 200;

   private File propertiesFile;
   private Properties settings;

   public PropertiesFrame()
   {
      // 從屬性集獲取大小位置和標題

      String userDir = System.getProperty("user.home");
      File propertiesDir = new File(userDir, ".corejava");
      if (!propertiesDir.exists()) propertiesDir.mkdir();
      propertiesFile = new File(propertiesDir, "program.properties");

      Properties defaultSettings = new Properties();
      defaultSettings.setProperty("left", "0");
      defaultSettings.setProperty("top", "0");
      defaultSettings.setProperty("width", "" + DEFAULT_WIDTH);
      defaultSettings.setProperty("height", "" + DEFAULT_HEIGHT);
      defaultSettings.setProperty("title", "");

      settings = new Properties(defaultSettings);

      if (propertiesFile.exists()) 
         try (InputStream in = new FileInputStream(propertiesFile))
         {         
            settings.load(in);
         }
         catch (IOException ex)
         {
            ex.printStackTrace();
         }

      int left = Integer.parseInt(settings.getProperty("left"));
      int top = Integer.parseInt(settings.getProperty("top"));
      int width = Integer.parseInt(settings.getProperty("width"));
      int height = Integer.parseInt(settings.getProperty("height"));
      setBounds(left, top, width, height);

      // 請求用戶輸入標題

      String title = settings.getProperty("title");
      if (title.equals(""))//判斷用戶是否輸入了標題
         title = JOptionPane.showInputDialog("Please supply a frame title:");//顯示請求用戶輸入的問題消息對話框。
      if (title == null) title = "";
      setTitle(title);//將此窗體的標題設置爲指定的字符串。 

      addWindowListener(new WindowAdapter()//添加指定的窗口偵聽器，以今後窗口接收窗口事件。
      {
         public void windowClosing(WindowEvent event)
         {//設置組件的座標 
            settings.setProperty("left", "" + getX());
            settings.setProperty("top", "" + getY());
            settings.setProperty("width", "" + getWidth());
            settings.setProperty("height", "" + getHeight());
            settings.setProperty("title", getTitle());//得到窗體的標題。標題顯示在窗體的邊框中。 
            try (OutputStream out = new FileOutputStream(propertiesFile))
            {
               settings.store(out, "Program Properties");
            }
            catch (IOException ex)//當發生某種 I/O 異常時，拋出此異常
            {
               ex.printStackTrace();
            }
            System.exit(0);
         }
      });
   }
}

實驗結果

輸入名稱後：

測試程序3

l 在elipse IDE中調試運行教材593頁-594程序13-3，結合程序運行結果理解程序；

l 瞭解Preferences類中經常使用的方法；

package preferences;

import java.awt.*;
import java.io.*;
import java.util.prefs.*;

import javax.swing.*;
import javax.swing.filechooser.*;

/**
 * A program to test preference settings. The program remembers the frame
 * position, size, and title.
 * @version 1.03 2015-06-12
 * @author Cay Horstmann
 */
public class PreferencesTest
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(() -> {
         PreferencesFrame frame = new PreferencesFrame();
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setVisible(true);
      });
   }
}

/**
 * A frame that restores position and size from user preferences and updates the
 * preferences upon exit.
 */
class PreferencesFrame extends JFrame
{
   private static final int DEFAULT_WIDTH = 300;
   private static final int DEFAULT_HEIGHT = 200;
   private Preferences root = Preferences.userRoot();//調用用戶的根首選項節點。
   private Preferences node = root.node("/com/horstmann/corejava");

   public PreferencesFrame()
   {
      // 從屬性集獲取大小位置和標題

      int left = node.getInt("left", 0);
      int top = node.getInt("top", 0);
      int width = node.getInt("width", DEFAULT_WIDTH);
      int height = node.getInt("height", DEFAULT_HEIGHT);
      setBounds(left, top, width, height);

      // 請求用戶輸入標題

      String title = node.get("title", "");
      if (title.equals(""))
         title = JOptionPane.showInputDialog("Please supply a frame title:");//顯示請求用戶輸入的問題消息對話框
      if (title == null) title = "";
      setTitle(title);

      // 用戶主目錄的文件選擇器

      final JFileChooser chooser = new JFileChooser();
      chooser.setCurrentDirectory(new File("."));//設置當前目錄
      chooser.setFileFilter(new FileNameExtensionFilter("XML files", "xml"));

      // 建立菜單

      JMenuBar menuBar = new JMenuBar();
      setJMenuBar(menuBar);//設置此窗體的菜單欄。 
      JMenu menu = new JMenu("File");
      menuBar.add(menu);

      JMenuItem exportItem = new JMenuItem("Export preferences");
      menu.add(exportItem);
      exportItem
            .addActionListener(event -> {
               if (chooser.showSaveDialog(PreferencesFrame.this) == JFileChooser.APPROVE_OPTION)
               {
                  try
                  {
                     savePreferences();
                     OutputStream out = new FileOutputStream(chooser
                           .getSelectedFile());
                     node.exportSubtree(out);
                     out.close();
                  }
                  catch (Exception e)
                  {
                     e.printStackTrace();
                  }
               }
            });

      JMenuItem importItem = new JMenuItem("Import preferences");//菜單中的項的實現
      menu.add(importItem);
      importItem
            .addActionListener(event -> {
               if (chooser.showOpenDialog(PreferencesFrame.this) == JFileChooser.APPROVE_OPTION)
               {
                  try
                  {
                     InputStream in = new FileInputStream(chooser
                           .getSelectedFile());
                     Preferences.importPreferences(in);
                     in.close();
                  }
                  catch (Exception e)
                  {
                     e.printStackTrace();
                  }
               }
            });

      JMenuItem exitItem = new JMenuItem("Exit");
      menu.add(exitItem);
      exitItem.addActionListener(event -> {
         savePreferences();
         System.exit(0);
      });
   }
   
   public void savePreferences() 
   {
      node.putInt("left", getX());
      node.putInt("top", getY());
      node.putInt("width", getWidth());
      node.putInt("height", getHeight());
      node.put("title", getTitle());      
   }
}

實驗結果

將File點開後：

測試程序4

l 在elipse IDE中調試運行教材619頁-622程序13-6，結合程序運行結果理解程序；

l 掌握基於JNLP協議的java Web Start應用程序的發佈方法。

package webstart;

import java.awt.*;
import javax.swing.*;

/**
 * 具備可做爲Java Web啓動應用程序部署的計算曆史的計算器。
 * @version 1.04 2015-06-12
 * @author Cay Horstmann
 */
public class Calculator
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(() ->             {
               CalculatorFrame frame = new CalculatorFrame();
               frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               frame.setVisible(true);
         });
   }
}

package webstart;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.MalformedURLException;
import java.net.URL;

import javax.jnlp.BasicService;
import javax.jnlp.FileContents;
import javax.jnlp.FileOpenService;
import javax.jnlp.FileSaveService;
import javax.jnlp.PersistenceService;
import javax.jnlp.ServiceManager;
import javax.jnlp.UnavailableServiceException;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;

/**
 * 一個帶有計算器面板和菜單的框架，用來載入和保存計算器歷史。
 */
public class CalculatorFrame extends JFrame
{
   private CalculatorPanel panel;

   public CalculatorFrame()
   {
      setTitle();
      panel = new CalculatorPanel();
      add(panel);

      JMenu fileMenu = new JMenu("File");
      JMenuBar menuBar = new JMenuBar();
      menuBar.add(fileMenu);
      setJMenuBar(menuBar);

      JMenuItem openItem = fileMenu.add("Open");
      openItem.addActionListener(event -> open());
      JMenuItem saveItem = fileMenu.add("Save");
      saveItem.addActionListener(event -> save());
      
      pack();
   }

   /**
    * 從持久存儲中獲取標題，或者在沒有之前的條目的狀況下向用戶請求標題。
    */
   public void setTitle()
   {
      try
      {
         String title = null;

         BasicService basic = (BasicService) ServiceManager.lookup("javax.jnlp.BasicService");
         URL codeBase = basic.getCodeBase();

         PersistenceService service = (PersistenceService) ServiceManager
               .lookup("javax.jnlp.PersistenceService");
         URL key = new URL(codeBase, "title");

         try
         {
            FileContents contents = service.get(key);
            InputStream in = contents.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(in));
            title = reader.readLine();
         }
         catch (FileNotFoundException e)
         {
            title = JOptionPane.showInputDialog("Please supply a frame title:");
            if (title == null) return;

            service.create(key, 100);
            FileContents contents = service.get(key);
            OutputStream out = contents.getOutputStream(true);
            PrintStream printOut = new PrintStream(out);
            printOut.print(title);
         }
         setTitle(title);
      }
      catch (UnavailableServiceException | IOException e)
      {
         JOptionPane.showMessageDialog(this, e);
      }
   }

   /**
    * 打開歷史文件並更新顯示。
    */
   public void open()
   {
      try
      {
         FileOpenService service = (FileOpenService) ServiceManager
               .lookup("javax.jnlp.FileOpenService");
         FileContents contents = service.openFileDialog(".", new String[] { "txt" });

         JOptionPane.showMessageDialog(this, contents.getName());
         if (contents != null)
         {
            InputStream in = contents.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(in));
            String line;
            while ((line = reader.readLine()) != null)
            {
               panel.append(line);
               panel.append("\n");
            }
         }
      }
      catch (UnavailableServiceException e)
      {
         JOptionPane.showMessageDialog(this, e);
      }
      catch (IOException e)
      {
         JOptionPane.showMessageDialog(this, e);
      }
   }

   /**
    * 將計算器歷史保存到文件中。
    */
   public void save()
   {
      try
      {
         ByteArrayOutputStream out = new ByteArrayOutputStream();
         PrintStream printOut = new PrintStream(out);
         printOut.print(panel.getText());
         InputStream data = new ByteArrayInputStream(out.toByteArray());
         FileSaveService service = (FileSaveService) ServiceManager
               .lookup("javax.jnlp.FileSaveService");
         service.saveFileDialog(".", new String[] { "txt" }, data, "calc.txt");
      }
      catch (UnavailableServiceException e)
      {
         JOptionPane.showMessageDialog(this, e);
      }
      catch (IOException e)
      {
         JOptionPane.showMessageDialog(this, e);
      }
   }
}

package webstart;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;

/**
   具備計算器按鈕和結果顯示的面板。
*/
public class CalculatorPanel extends JPanel
{  
   private JTextArea display;
   private JPanel panel;
   private double result;
   private String lastCommand;
   private boolean start;

   /**
      列出面板。
   */
   public CalculatorPanel()
   {  
      setLayout(new BorderLayout());

      result = 0;
      lastCommand = "=";
      start = true;
      
      // 添加顯示
      display = new JTextArea(10, 20);

      add(new JScrollPane(display), BorderLayout.NORTH);
      
      ActionListener insert = new InsertAction();
      ActionListener command = new CommandAction();

      // 在4×4網格中添加按鈕

      panel = new JPanel();
      panel.setLayout(new GridLayout(4, 4));

      addButton("7", insert);
      addButton("8", insert);
      addButton("9", insert);
      addButton("/", command);

      addButton("4", insert);
      addButton("5", insert);
      addButton("6", insert);
      addButton("*", command);

      addButton("1", insert);
      addButton("2", insert);
      addButton("3", insert);
      addButton("-", command);

      addButton("0", insert);
      addButton(".", insert);
      addButton("=", command);
      addButton("+", command);

      add(panel, BorderLayout.CENTER);
   }

   /**
      獲取歷史文本。
      @return the calculator history
   */
   public String getText()
   {
      return display.getText();
   }
   
   /**
      將字符串追加到歷史文本中。
      @param s the string to append
   */
   public void append(String s)
   {
      display.append(s);
   }

   /**
      向中心面板添加一個按鈕。
      @param label the button label
      @param listener the button listener
   */
   private void addButton(String label, ActionListener listener)
   {  
      JButton button = new JButton(label);
      button.addActionListener(listener);
      panel.add(button);
   }

   /**
      此操做將按鈕操做字符串插入到顯示文本結束。
   */
   private class InsertAction implements ActionListener
   {
      public void actionPerformed(ActionEvent event)
      {
         String input = event.getActionCommand();
         start = false;
         display.append(input);
      }
   }

   /**
      此操做執行按鈕的命令。動做字符串表示。
   */
   private class CommandAction implements ActionListener
   {
      public void actionPerformed(ActionEvent event)
      {  
         String command = event.getActionCommand();

         if (start)
         {  
            if (command.equals("-")) 
            { 
               display.append(command); 
               start = false; 
            }
            else 
               lastCommand = command;
         }
         else
         {  
            try
            {
               int lines = display.getLineCount();
               int lineStart = display.getLineStartOffset(lines - 1);
               int lineEnd = display.getLineEndOffset(lines - 1);
               String value = display.getText(lineStart, lineEnd - lineStart);
               display.append(" ");
               display.append(command); 
               calculate(Double.parseDouble(value));
               if (command.equals("="))
                  display.append("\n" + result);
               lastCommand = command;
               display.append("\n");
               start = true;
            }
            catch (BadLocationException e)
            {
               e.printStackTrace();
            }
         }
      }
   }

   /**
     執行計算。
      @param x the value to be accumulated with the prior result.
   */
   public void calculate(double x)
   {
      if (lastCommand.equals("+")) result += x;
      else if (lastCommand.equals("-")) result -= x;
      else if (lastCommand.equals("*")) result *= x;
      else if (lastCommand.equals("/")) result /= x;
      else if (lastCommand.equals("=")) result = x;
   }  
}

實驗2：GUI綜合編程練習

按實驗十四分組名單，組內討論完成如下編程任務：

練習1：採用GUI界面設計如下程序，並進行部署與發佈：

l 編制一個程序，將身份證號.txt 中的信息讀入到內存中；

l 按姓名字典序輸出人員信息；

l 查詢最大年齡的人員信息；

l 查詢最小年齡人員信息；

l 輸入你的年齡，查詢身份證號.txt中年齡與你最近人的姓名、身份證號、年齡、性別和出生地；

l 查詢人員中是否有你的同鄉。

l 輸入身份證信息，查詢所提供身份證號的人員信息，要求輸入一個身份證數字時，查詢界面就顯示知足查詢條件的查詢結果，且隨着輸入的數字的增多，查詢匹配的範圍逐漸縮小。

package 1;

    import java.awt.Dimension;
    import java.awt.EventQueue;
    import java.awt.Toolkit;

    import javax.swing.JFrame;

    public class Out {

         public static void main (String args[])
            {
                 Toolkit t=Toolkit.getDefaultToolkit();
                Dimension s=t.getScreenSize(); 
                EventQueue.invokeLater(() -> {
                    JFrame frame = new Main1();
                    frame.setBounds(0, 0,(int)s.getWidth(),(int)s.getHeight());
                    frame.setTitle("身份查詢系統");
                    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    frame.setVisible(true);
                 });        
            }
     
    }

package1;


    public class Person implements Comparable<Person> {
        private String name;
        private String ID;
        private int age;
        private String sex;
        private String birthplace;

        public String getname() {
        return name;
        }
        public void setname(String name) {
        this.name = name;
        }
        public String getID() {
        return ID;
        }
        public void setID(String ID) {
        this.ID= ID;
        }
        public int getage() {

        return age;
        }
        public void setage(int age) {
        this.age= age;
        }
        public String getsex() {
        return sex;
        }
        public void setsex(String sex) {
        this.sex= sex;
        }
        public String getbirthplace() {
        return birthplace;
        }
        public void setbirthplace(String birthplace) {
        this.birthplace= birthplace;
        }

        public int compareTo(Person o) {
           return this.name.compareTo(o.getname());

        }

        public String toString() {
            return  name+"\t"+sex+"\t"+age+"\t"+ID+"\t"+birthplace+"\n";

        }



        }

package 1;

    import java.awt.BorderLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.util.*;
    import java.util.Timer;
    import javax.swing.*;

    public class Main1 extends JFrame
    {
        private static ArrayList<Person> Personlist;
        
        
        Scanner scanner = new Scanner(System.in);
        File file = new File("F:\\身份證號.txt");
        
        private JPanel Panel;
        private JLabel JLabel1;
        private JButton Button,Button2,Button3;
        private JTextArea text,text1,text2,text3;
        boolean tru=true;
        
        
        
        public  Main1() {

            
            Panel = new JPanel();Panel.setLayout(null);
            Button = new JButton("1:按姓名字典序輸出人員信息");
            Button2 = new JButton("2:查詢最大年齡與最小年齡人員信息");
            Button3 = new JButton("查詢相近年齡");
            JLabel1 = new JLabel("輸入身份證號或者地址查詢");JLabel1.setBounds(900, 50, 400, 30);
            
            text=new JTextArea(30,80);text.setBounds(50, 180, 700, 700);
            text1=new JTextArea(1,30);text1.setBounds(900, 80, 400, 30);
            text2=new JTextArea(30,80);text2.setBounds(900,180,700, 700);
            text3=new JTextArea(30,80);text3.setBounds(420,100,200,40);
           
            Button.addActionListener(new Action());Button.setBounds(50,50,300,40);
            Button2.addActionListener(new Action1());Button2.setBounds(50,100,300,40);
            Button3.addActionListener(new Action2());Button3.setBounds(650,100,120,40);
            Panel.add(JLabel1);
            Panel.add(Button);
            Panel.add(Button2);
            Panel.add(Button3);
            Panel.add(text);
            Panel.add(text2);
            Panel.add(text1);
            Panel.add(text3);
            add(Panel);
            
            
            Timer timer = new Timer();      
            TimerTask timeTask=new TimerTask() {
                
                 @Override
                public void run()
                 {             
                         // TODO Auto-generated method stub
                         text2.setText(null);
                         String place=text1.getText().toString().trim();
                         for (int i = 0; i <Personlist.size(); i++) 
                         {
                             
                             String Str=(String)Personlist.get(i).getbirthplace();
                             if(Str.contains(place)&&!place.equals("")) 
                                 {
                                 text2.append(Personlist.get(i).toString());
                                 }  
                        }      
                         for (int i = 0; i <Personlist.size(); i++) 
                         {
                             
                             String Str=(String)Personlist.get(i).getID();
                             if(Str.contains(place)&&!place.equals("")) 
                                 {
                                 text2.append(Personlist.get(i).toString());
                                 }  
                        }    
                         
                }
                
            };timer.schedule(timeTask, 0,100);
         
            Personlist = new ArrayList<>();       
            try {
                FileInputStream fis = new FileInputStream(file);
                BufferedReader in = new BufferedReader(new InputStreamReader(fis));
                String temp = null;
                while ((temp = in.readLine()) != null) {            
                    Scanner linescanner = new Scanner(temp);               
                    linescanner.useDelimiter(" ");    
                    String name = linescanner.next();
                    String ID = linescanner.next();
                    String sex = linescanner.next();
                    String age = linescanner.next();
                    String place =linescanner.nextLine();
                    Person Person = new Person();
                    Person.setname(name);
                    Person.setID(ID);
                    Person.setsex(sex);
                    int a = Integer.parseInt(age);
                    Person.setage(a);
                    Person.setbirthplace(place);
                    Personlist.add(Person);

                }
            } catch (FileNotFoundException e) {
                System.out.println("查找不到信息");
                e.printStackTrace();
            } catch (IOException e) {
                System.out.println("信息讀取有誤");
                e.printStackTrace();
            }
     
            
        }
        
        


        private class Action implements ActionListener
        {
        public void actionPerformed(ActionEvent event)
            {        
             text.setText(null);
             Collections.sort(Personlist);
             text.append(Personlist.toString());
            }

        }         

        private class Action1 implements ActionListener
            {
            public void actionPerformed(ActionEvent event)
                {        
                text.setText(null);
                int max=0,min=100;int j,k1 = 0,k2=0;
                for(int i=1;i<Personlist.size();i++)
                {
                    j=Personlist.get(i).getage();
                   if(j>max)
                   {
                       max=j; 
                       k1=i;
                   }
                   if(j<min)
                   {
                       min=j; 
                       k2=i;
                   }
                }  
                text.append("年齡最大：   "+Personlist.get(k1)+"\n"+"年齡最小：  "+Personlist.get(k2));     
                }
       
            }          

        private class Action2 implements ActionListener
        {
        public void actionPerformed(ActionEvent event)
            {        
             text.setText(null);
             int a = Integer.parseInt(text3.getText().toString().trim());         
             int d_value=a-Personlist.get(agenear(a)).getage();
             
             for (int i = 0; i < Personlist.size(); i++)
             {
                 int p=Personlist.get(i).getage()-a;
                
                 if(p==d_value||-p==d_value) text.append(Personlist.get(i).toString());
             } 
            }

        } 
        
        
        public static int agenear(int age) {
            
            int j=0,min=53,d_value=0,k=0;
             for (int i = 0; i < Personlist.size(); i++)
             {
                 d_value=Personlist.get(i).getage()-age;
                 if(d_value<0) d_value=-d_value; 
                 if (d_value<min) 
                 {
                    min=d_value;
                    k=i;
                 }

              }    return k;
             
          }

    }

結果

練習2：採用GUI界面設計如下程序，並進行部署與發佈

l 編寫一個計算器類，能夠完成加、減、乘、除的操做

l 利用計算機類，設計一個小學生100之內數的四則運算練習程序，由計算機隨機產生10道加減乘除練習題，學生輸入答案，由程序檢查答案是否正確，每道題正確計10分，錯誤不計分，10道題測試結束後給出測試總分；

l 將程序中測試練習題及學生答題結果輸出到文件，文件名爲test.txt。

package mh;

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Toolkit;

import javax.swing.JFrame;

public class math {

    public static void main(String args[]) {
        Toolkit t = Toolkit.getDefaultToolkit();
        Dimension s = t.getScreenSize();
        EventQueue.invokeLater(() -> {
            JFrame frame = new main();
            frame.setBounds(0, 0, (int) s.getWidth() / 2, (int) s.getHeight() / 2);
            frame.setTitle("算術測試");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
        });
    }

}

package mh;

import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Collections;
import java.util.Scanner;

import javax.swing.*;

import java.math.*;

public class main extends JFrame {

    private String[] c = new String[10];
    private String[] c1 = new String[10];
    private int[] list = new int[10];
    int i = 0, i1 = 0, sum = 0;

    private PrintWriter out = null;
    private JTextArea text, text1;
    private int counter;

    public main() {
        JPanel Panel = new JPanel();
        Panel.setLayout(null);
        JLabel JLabel1 = new JLabel("");
        JLabel1.setBounds(500, 800, 400, 30);
        JLabel1.setFont(new Font("Courier", Font.PLAIN, 20));
        JButton Button = new JButton("生成題目");
        Button.setBounds(50, 150, 150, 50);
        Button.setFont(new Font("Courier", Font.PLAIN, 20));
        Button.addActionListener(new Action());
        JButton Button2 = new JButton("肯定答案");
        Button2.setBounds(300, 150, 150, 50);
        Button2.setFont(new Font("Courier", Font.PLAIN, 20));
        Button2.addActionListener(new Action1());
        JButton Button3 = new JButton("讀出文件");
        Button3.setBounds(500, 150, 150, 50);
        Button3.setFont(new Font("Courier", Font.PLAIN, 20));
        Button3.addActionListener(new Action2());
        text = new JTextArea(30, 80);
        text.setBounds(30, 50, 200, 50);
        text.setFont(new Font("Courier", Font.PLAIN, 30));
        text1 = new JTextArea(30, 80);
        text1.setBounds(270, 50, 200, 50);
        text1.setFont(new Font("Courier", Font.PLAIN, 30));

        Panel.add(text);
        Panel.add(text1);

        Panel.add(Button);
        Panel.add(Button2);
        Panel.add(Button3);
        Panel.add(JLabel1);
        add(Panel);

    }

    private class Action implements ActionListener {
        public void actionPerformed(ActionEvent event) {
            text1.setText("");
            if (i <= 10) {

                int a = (int) Math.round(Math.random() * 100);
                int b = (int) Math.round(Math.random() * 100);
                int m = (int) Math.round(Math.random() * 3);
                switch (m) {
                case 0:
                    while (a % b != 0) {
                        a = (int) Math.round(Math.random() * 100);
                    }
                    while (b == 0) {
                        b = (int) Math.round(Math.random() * 100);
                    }
                    c[i] = (i + ":" + a + "/" + b + "=");
                    list[i] = Math.floorDiv(a, b);
                    text.setText(i + ":" + a + "/" + b + "=");
                    i++;

                    break;
                case 1:
                    c[i] = (i + ":" + a + "*" + b + "=");
                    list[i] = Math.multiplyExact(a, b);
                    text.setText(i + ":" + a + "*" + b + "=");
                    i++;
                    break;
                case 2:
                    c[i] = (i + ":" + a + "+" + b + "=");
                    list[i] = Math.addExact(a, b);
                    text.setText(i + ":" + a + "+" + b + "=");
                    i++;
                    break;
                case 3:
                    while (a < b) {
                        b = (int) Math.round(Math.random() * 100);
                        a = (int) Math.round(Math.random() * 100);
                    }
                    c[i] = (i + ":" + a + "-" + b + "=");
                    text.setText(i + ":" + a + "-" + b + "=");
                    list[i] = Math.subtractExact(a, b);
                    i++;

                    break;
                }
            }
        }
    }

    private class Action1 implements ActionListener {
        public void actionPerformed(ActionEvent event) {

            if (i < 10) {
                text.setText(null);
                String z = text1.getText().toString().trim();
                int a = Integer.parseInt(z);
                if (text1.getText() != "") {
                    if (list[i1] == a)
                        sum += 10;
                }

                c1[i1] = z;

                i1++;

            }
        }

    }

    private class Action2 implements ActionListener {
        public void actionPerformed(ActionEvent event) {

            try {
                out = new PrintWriter("text.txt");
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            for (int counter = 0; counter < 10; counter++) {
                out.println(c[counter] + c1[counter]);
            }
            out.println("成績" + sum);
            out.close();

        }

    }
}