十五201771010119穷吉

实验十五  GUI编程练习与应用程序部署

 

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 1 jar命令格式： jar {ctxui} [vfm0Me] [jar-file] [manifest-file] [entry-point] [-C dir] files ... 2 Jar命令选项（教材581页表13-1）： – -c 创建一个新的或者空的存档文件并加入文件。 – -C 暂时改变到指定的目录 – -e 在清单文件中创建一个条目 – -f 将JAR文件名指定为第二个命令行参数 – -i 为指定的JAR文件产生索引信息 – -m 将一个清单文件（manifest）添加到JAR文件中 – -M 不产生所有项的清单文件（manifest） – -t 列出存档内容的列表– -u 更新已存在的JAR文件 – -v 生成详细的输出结果 – -x 解压存档中的命名的（或所有的〕文件 – -0 只存储方式，不用ZIP压缩格式

(1) 创建JAR文件 jar cf jar-file input-file(s) c---want to Create a JAR file. eg: 1) jar cf MenuTest.jar *.class *.gif f---want the output to go to a file rather than to stdout. 2) jar cvf MenuTest.jar *.class *.gif v---Produces verbose output to stdout. 3) jar cvf MenuTest.jar * *---create all contents in current directory. 4) jar cv0f MenuTest.jar * 0---don't want the JAR file to be compressed.

(2) 查看JAR文件 jar tf jar-file t---want to view the Table of contents of the JAR file. eg: 1) jar tvf MenuTest.jar v---Produces verbose output to stdout.

(3) 提取JAR文件 jar xf jar-file [archived-file(s)] x---want to extract files from the JAR archive. eg: 1) jar xf MenuTest.jar copy.gif(仅提取文件copy.gif) 2) jar xf MenuTest.jar alex/copy.gif(仅提取目录alex下的 文件copy.gif) 3) jar xf MenuTest.jar(提取该JAR中的所有文件或目录)

(4) 更新JAR文件 jar uf jar-file input-file(s) u---want to update an existing JAR file. eg: 1) jar uf MenuTest.jar copy.gif (5) 索引JAR文件 jar i jar-file i---index an existing JAR file. eg: 1) jar i MenuTest.jar

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。

 最小的符合标准的清单文件是很简单的：Manifest-Version：1.0复杂的清单文件包含多个条目，这些条目被分成多个节。第一节被称为主节，作用于整个JAR文件。随后的条目用来指定已命名条目的属性，可以是文件、包或者URL。

 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。

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；

代码：

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");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
});
}
}

/**
* 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);
URL aboutURL = getClass().getResource("about.gif");
Image img = new ImageIcon(aboutURL).getImage();//利用about.gif图像文件制作图标，在找到ResourceTest类的地方查找about.gif文件。
setIconImage(img);

JTextArea textArea = new JTextArea();
InputStream stream = getClass().getResourceAsStream("about.txt");
try (Scanner in = new Scanner(stream, "UTF-8"))//读取about .txt文件
{
while (in.hasNext())
textArea.append(in.nextLine()

+ " ");
}
add(textArea);
}
}

结果图：

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；

package properties;

import java.awt.EventQueue;
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()
{
// get position, size, title from properties

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);

// if no title given, ask user

String title = settings.getProperty("title");
if (title.equals(""))
title = JOptionPane.showInputDialog("Please supply a frame title:");
if (title == null) title = "";
setTitle(title);

addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent event)
{
settings.setProperty("left", "" + getX());
settings.setProperty("top", "" + getY());
settings.setProperty("width", "" + getWidth());
settings.setProperty("height", "" + getHeight());
settings.setProperty("title", getTitle());
try (OutputStream out = new FileOutputStream(propertiesFile))
{
settings.store(out, "Program Properties");
}
catch (IOException ex)
{
ex.printStackTrace();
}
System.exit(0);
}
});
}
}

结果图：

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；

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);//框架默认关闭操作（jfren.出口__关闭）；
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();//返回调用程序的用户的首选根节点
private Preferences node = root.node("/com/horstmann/corejava");

public PreferencesFrame()
{
// get position, size, title from preferences从首选项中获取位置、大小、标题

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);

// if no title given, ask user如果未给定标题，请询问用户

String title = node.get("title", "");
if (title.equals(""))
title = JOptionPane.showInputDialog("Please supply a frame title:");//标题=joptipan.展示输入对话框（“请提供一个框架标题：”）；
if (title == null) title = "";
setTitle(title);

// set up file chooser that shows XML files设置显示XML文件的文件选择器

final JFileChooser chooser = new JFileChooser();
chooser.setCurrentDirectory(new File("."));
chooser.setFileFilter(new FileNameExtensionFilter("XML files", "xml"));

// set up menus设置菜单

JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);
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");
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());
}

结果图：

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。

package webstart;

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

/**
 * A calculator with a calculation history that can be deployed as a Java Web Start application.
 * @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;

/**
 * A frame with a calculator panel and a menu to load and save the calculator history.
 */
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();
   }

   /**
    * Gets the title from the persistent store or asks the user for the title if there is no prior
    * entry.
    */
   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);
      }
   }

   /**
    * Opens a history file and updates the display.
    */
   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("
");
            }
         }
      }
      catch (UnavailableServiceException e)
      {
         JOptionPane.showMessageDialog(this, e);
      }
      catch (IOException e)
      {
         JOptionPane.showMessageDialog(this, e);
      }
   }

   /**
    * Saves the calculator history to a file.
    */
   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.*;

/**
   A panel with calculator buttons and a result display.
*/
public class CalculatorPanel extends JPanel
{  
   private JTextArea display;
   private JPanel panel;
   private double result;
   private String lastCommand;
   private boolean start;

   /**
      Lays out the panel.
   */
   public CalculatorPanel()
   {  
      setLayout(new BorderLayout());

      result = 0;
      lastCommand = "=";
      start = true;
      
      // add the display

      display = new JTextArea(10, 20);

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

      // add the buttons in a 4 x 4 grid

      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);
   }

   /**
      Gets the history text.
      @return the calculator history
   */
   public String getText()
   {
      return display.getText();
   }
   
   /**
      Appends a string to the history text.
      @param s the string to append
   */
   public void append(String s)
   {
      display.append(s);
   }

   /**
      Adds a button to the center panel.
      @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);
   }

   /**
      This action inserts the button action string to the
      end of the display text.
   */
   private class InsertAction implements ActionListener
   {
      public void actionPerformed(ActionEvent event)
      {
         String input = event.getActionCommand();
         start = false;
         display.append(input);
      }
   }

   /**
      This action executes the command that the button
      action string denotes.
   */
   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("
" + result);
               lastCommand = command;
               display.append("
");
               start = true;
            }
            catch (BadLocationException e)
            {
               e.printStackTrace();
            }
         }
      }
   }

   /**
      Carries out the pending calculation. 
      @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;
   }  
}

package webstart;

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

/**
   A panel with calculator buttons and a result display.
*/
public class CalculatorPanel extends JPanel
{  
   private JTextArea display;
   private JPanel panel;
   private double result;
   private String lastCommand;
   private boolean start;

   /**
      Lays out the panel.
   */
   public CalculatorPanel()
   {  
      setLayout(new BorderLayout());

      result = 0;
      lastCommand = "=";
      start = true;
      
      // add the display

      display = new JTextArea(10, 20);

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

      // add the buttons in a 4 x 4 grid

      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);
   }

   /**
      Gets the history text.
      @return the calculator history
   */
   public String getText()
   {
      return display.getText();
   }
   
   /**
      Appends a string to the history text.
      @param s the string to append
   */
   public void append(String s)
   {
      display.append(s);
   }

   /**
      Adds a button to the center panel.
      @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);
   }

   /**
      This action inserts the button action string to the
      end of the display text.
   */
   private class InsertAction implements ActionListener
   {
      public void actionPerformed(ActionEvent event)
      {
         String input = event.getActionCommand();
         start = false;
         display.append(input);
      }
   }

   /**
      This action executes the command that the button
      action string denotes.
   */
   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("
" + result);
               lastCommand = command;
               display.append("
");
               start = true;
            }
            catch (BadLocationException e)
            {
               e.printStackTrace();
            }
         }
      }
   }

   /**
      Carries out the pending calculation. 
      @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;
   }  
}

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。

 package 身份证;

 

import java.awt.*;

import javax.swing.*;

 

public class ButtonTest {

    public static void main(String[] args) {

        EventQueue.invokeLater(() -> {

            JFrame frame = new Main();

            frame.setTitle("身份证");

            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            frame.setVisible(true);

        });

    }

}

 

package 身份证;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class 身份证1 extends JFrame {
private static ArrayList<Student> studentlist;
private static ArrayList<Student> list;
private JPanel panel;
private JPanel buttonPanel;
private static final int DEFAULT_WITH = 600;
private static final int DEFAULT_HEIGHT = 300;

public 身份证1() {
studentlist = new ArrayList<>();
Scanner scanner = new Scanner(System.in);
File file = new File("D:\java\身份证号.txt");
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 number = linescanner.next();
String sex = linescanner.next();
String age = linescanner.next();
String province = linescanner.nextLine();
Student student = new Student();
student.setName(name);
student.setnumber(number);
student.setsex(sex);
int a = Integer.parseInt(age);
student.setage(a);
student.setprovince(province);
studentlist.add(student);

}
} catch (FileNotFoundException e) {
System.out.println("学生信息文件找不到");
e.printStackTrace();
} catch (IOException e) {
System.out.println("学生信息文件读取错误");
e.printStackTrace();
}
panel = new JPanel();
panel.setLayout(new BorderLayout());
JTextArea jt = new JTextArea();
panel.add(jt);
add(panel, BorderLayout.NORTH);
buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(1, 7));
JButton jButton = new JButton("字典排序");
JButton jButton1 = new JButton("年龄最大和年龄最小");
JLabel lab = new JLabel("猜猜你的老乡");
JTextField jt1 = new JTextField();
JLabel lab1 = new JLabel("找找同龄人（年龄相近）：");
JTextField jt2 = new JTextField();
JLabel lab2 = new JLabel("输入你的身份证号码：");
JTextField jt3 = new JTextField();
JButton jButton2 = new JButton("退出");
jButton.setBounds(110, 90, 60, 30);
jButton1.setBounds(110, 90, 60, 30);
jt1.setBounds(110, 90, 60, 30);
jt2.setBounds(110, 90, 60, 30);
jt3.setBounds(110, 90, 60, 30);
jButton2.setBounds(110, 90, 60, 30);
jButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Collections.sort(studentlist);
jt.setText(studentlist.toString());
}
});
jButton1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int max = 0, min = 100;
int j, k1 = 0, k2 = 0;
for (int i = 1; i < studentlist.size(); i++) {
j = studentlist.get(i).getage();
if (j > max) {
max = j;
k1 = i;
}
if (j < min) {
min = j;
k2 = i;
}

}
jt.setText("年龄最大：" + studentlist.get(k1) + "年龄最小：" + studentlist.get(k2));
}
});
jButton2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
dispose();
System.exit(0);
}
});
jt1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String find = jt1.getText();
String text="";
String place = find.substring(0, 3);
for (int i = 0; i < studentlist.size(); i++) {
if (studentlist.get(i).getprovince().substring(1, 4).equals(place)) {
text+=" "+studentlist.get(i);
jt.setText("老乡：" + text);
}
}
}
});
jt2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String yourage = jt2.getText();
int a = Integer.parseInt(yourage);
int near = agenear(a);
int value = a - studentlist.get(near).getage();
jt.setText("年龄相近：" + studentlist.get(near));
}
});
jt3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
list = new ArrayList<>();
Collections.sort(studentlist);
String key = jt3.getText();
for (int i = 1; i < studentlist.size(); i++) {
if (studentlist.get(i).getnumber().contains(key)) {
list.add(studentlist.get(i));
jt.setText("emmm！你可能是： " + list);
//System.out.println("可能的人：" + studentlist.get(i));
//jt.setText("可能的人：" + studentlist.get(i));
}
}
}
});
buttonPanel.add(jButton);
buttonPanel.add(jButton1);
buttonPanel.add(lab);
buttonPanel.add(jt1);
buttonPanel.add(lab1);
buttonPanel.add(jt2);
buttonPanel.add(lab2);
buttonPanel.add(jt3);
buttonPanel.add(jButton2);
add(buttonPanel, BorderLayout.SOUTH);
setSize(DEFAULT_WITH, DEFAULT_HEIGHT);
}

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

}

 

package 身份证;

public class Student implements Comparable<Student> {

private String name;
private String number ;
private String sex ;
private int age;
private String province;

public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getnumber() {
return number;
}
public void setnumber(String number) {
this.number = number;
}
public String getsex() {
return sex ;
}
public void setsex(String sex ) {
this.sex =sex ;
}
public int getage() {

return age;
}
public void setage(int age) {
// int a = Integer.parseInt(age);
this.age= age;
}

public String getprovince() {
return province;
}
public void setprovince(String province) {
this.province=province ;
}

public int compareTo(Student o) {
return this.name.compareTo(o.getName());
}

public String toString() {
return name+" "+sex+" "+age+" "+number+" "+province+" ";
}

}

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。

package 计算器;

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 Demo 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 Demo() {
JPanel Panel = new JPanel();
Panel.setLayout(null);
JLabel JLabel1=new JLabel("");
JLabel1.setBounds(500, 800, 400, 30);
JLabel1.setFont(new Font("Courier",Font.PLAIN,35));
JButton Button = new JButton("生成题目");
Button.setBounds(50,150,150,50);
Button.setFont(new Font("Courier",Font.PLAIN,20));
Button.addActionListener(new Action());
JButton Button2 = new JButton("确定答案");
Button2.setBounds(300,150,150,50);
Button2.setFont(new Font("Courier",Font.PLAIN,20));
Button2.addActionListener(new Action1());
JButton Button3 = new JButton("读出文件");
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,35));
text1=new JTextArea(30,80);
text1.setBounds(270, 50, 200, 50);
text1.setFont(new Font("Courier",Font.PLAIN,35));
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("0");
if(i<10) {

int a = 1+(int)(Math.random() * 99);
int b = 1+(int)(Math.random() * 99);
int m= (int) Math.round(Math.random() * 3);
switch(m)
{
case 0:
while(a<b){
b = (int) Math.round(Math.random() * 100);
a = (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 daan=text1.getText().toString().trim();
int a = Integer.parseInt(daan);
if(text1.getText()!="") {
if(list[i1]==a) sum+=10;
}
c1[i1]=daan;
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("成绩"+sum);
out.close();

}

}

}

package 计算器;

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

import javax.swing.JFrame;

public class New {

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

}

 

 

 

实验总结：

这次实验中认识到自己学习的理解还不够到位，不能清楚地了解所学的知识，不会将学到的东西实际运用。需要进一步加强练习。