王艳 《面向对象程序设计》第十五周学习总结

实验十五  GUI编程练习与应用程序部署

一:理论部分。

1.Java 程序的打包:编译完成后,程序员将.class 文件压缩打包为 .jar 文件后,GUI 界面序就可以直接双击图标运行。
JAR 文件是压缩的,它使用 ZIP 压缩格式。

创建一个包含清单的 JAR 文件,应该运行:jar cf mMyArchive.jar manifest.mf com/ *.class
2.资源:Java 中,应用程序使的类通常需要一些相关数中,应用程序使的类通常需要一些相关数 据文件,这些称为资源 (Resource) 。
–图像和声音文件。
–带有消息字符串和按钮标签的文本件。
–二进制数据文件,如:描述地图布局的。

2.Eclipse 导出 JAR 文件。

a.工程没有引用外部 jar 包时:直接导出。
b.工程没有引用外部 jar 包时:导出步骤为:
.选中工程 ---- >右键 ,Export--- >Java -- ->JAR file--- >next-- >选择 jar  file的路径及名称 -- >next--- >选择 main class --- >finish

3.包密封:要想密封一个包,需将中的所有类放到一个JAR 文件。在默认情况下, JAR 文件中的包是没有 密封的。
4.应用首选项的存储:应用程序户通常期待能够自行对进配置,并能够将其保存起来以便日后再次运行该程序时能够读取这些配置。
 一般有两种方法:
a.将配置信息存储在属性文件中;
b.将配置信息存储在 中心知识库。

5.属性映射:属性映射常被用来存放配置信息,是一种存储键 /值对的数据结构。
.属性映射有三个特征:
a.键和值都是字符串;
b.键/值对易于写入文件或从读出; 值对易于写入文件或从读出;
c.用二级表存放默认值。
实现属性映射的 Java 类被称为 Properties 。

6.Java Web Start:它是一个用 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,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。

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;

代码如下:

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;//定义窗口宽和高

   public ResourceTestFrame()//构造器
   {
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
      URL aboutURL = getClass().getResource("about.gif");//URL来指向about.gif资源地址
      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();//创建文本区
      InputStream stream = getClass().getResourceAsStream("about.txt");//读取about.txt文件
      try (Scanner in = new Scanner(stream, "UTF-8"))
      {
         while (in.hasNext())
            textArea.append(in.nextLine() + "\n");
      }
      add(textArea);
   }
}

程序中用到如下资源:


程序运行结果入如下:

 

测试程序2

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

l 了解Properties类中常用的方法;

代码如下:

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//继承类:实现属性映射
{
   private static final int DEFAULT_WIDTH = 300;
   private static final int DEFAULT_HEIGHT = 200;//定义宽和高

   private File propertiesFile;
   private Properties settings;

   public PropertiesFrame()//构造器
   {
      // 从属性获取位置、大小、标题 

      String userDir = System.getProperty("user.home");//(读取单个键)找出用户的主目录,主目录包含user.home
      File propertiesDir = new File(userDir, ".corejava");
      if (!propertiesDir.exists()) propertiesDir.mkdir();
      propertiesFile = new File(propertiesDir, "program.properties");
      
      //把所有默认值放在一个二级属性映射中,并在主属性映射的构造器中提供这个二级属性
      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);

      //如果没有标题,询问用户

      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);
         }
      });
   }
}

运行结果如下:

测试程序3

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

了解Preferences类中常用的方法;

程序如下:

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();//定义根节点
   private Preferences node = root.node("/com/horstmann/corejava");//定义节点路径名

   public PreferencesFrame()//构造器
   {
      //从偏好获得位置、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

      String title = node.get("title", "");
      if (title.equals(""))
         title = JOptionPane.showInputDialog("Please supply a frame title:");
      if (title == null) title = "";
      setTitle(title);

      // 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"));

      //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());      
   }
}

运行结果如图:

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。

程序如下:

 

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("\n");
            }
         }
      }
      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("\n" + result);
               lastCommand = command;
               display.append("\n");
               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;
   }  
}

 代码出现错误

 

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。

 程序如下:

package demo1;

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 demo1;

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 Main 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 Main() {
        studentlist = new ArrayList<>();
        Scanner scanner = new Scanner(System.in);
        File file = new File("C:\\Users\\ASUS\\Desktop\\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+="\n"+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:\n" + 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 demo1;

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+"\t"+sex+"\t"+age+"\t"+number+"\t"+province+"\n";
    }    
}

 

 测试结果如下

 

运行结果:

字典排序:

1.查询最大年龄的人员信息;

2.查询最小年龄人员信息;

 找老乡:

 年龄相近的人:

 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。

输入数字2时:

输入数字26时:

输入数字265时:

 

 

 

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。

程序如下:

 

package ui_test;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;

import javax.swing.*;

public class MyExGUI extends JFrame {
    ArrayList<String> user_zongti = new ArrayList<String>();
    ArrayList<String> user_zonganswer = new ArrayList<String>();
    ArrayList<String> user_answer = new ArrayList<String>();
    ArrayList<String> true_answer = new ArrayList<String>();
    ArrayList<String> jta_timu = new ArrayList<String>();
    ArrayList<String> jta_zong = new ArrayList<String>();
    ArrayList<Integer> user_fenshu = new ArrayList<Integer>();
    JMenuBar jm; // 菜单条组件
    JMenu menu;// 菜单
    JMenuItem item1, item2;// 菜单项
    JMenu build; // 二级菜单
    JMenuItem file, project;
    TextArea answer_all = new TextArea();
    TextField jta = new TextField();
    TextField jta_answer = new TextField();
    JLabel num_answer = new JLabel();
    JLabel answer;
    JToolBar jtb;// 工具条
    JButton jb1, jb2, jb3, jb4, jb5, jb6, jb7, jb_next;
    int answer_count;
    int answer_fenshu;

    public MyExGUI() {
        // 创建菜单
        jm = new JMenuBar();

        menu = new JMenu("文件(F)");
        menu.setMnemonic('f'); // 助记符

        build = new JMenu("新建");

        file = new JMenuItem("文件");
        project = new JMenuItem("答题");
        item1 = new JMenuItem("保存(S)");
        item2 = new JMenuItem("退出");

        answer = new JLabel("第 1 题");

        // 添加菜单项至菜单上
        build.add(file);
        build.add(project);

        menu.add(build);
        menu.add(item1);
        menu.add(item2);
        menu.addSeparator();
        // 将菜单加入至菜单栏
        jm.add(menu);

        JPanel contentPanel = new JPanel();
        contentPanel.setLayout(null);
        JLabel daan = new JLabel("答案");
        JLabel dengyu = new JLabel("=");
        num_answer = answer;
        num_answer.setFont(new Font("宋体", Font.BOLD, 22));
        jb_next = new JButton("下一题");
        jta.setFont(new Font("宋体", Font.BOLD, 22));
        jta_answer.setFont(new Font("宋体", Font.BOLD, 22));
        jb_next.setFont(new Font("宋体", Font.BOLD, 22));
        daan.setFont(new Font("宋体", Font.BOLD, 22));
        dengyu.setFont(new Font("宋体", Font.BOLD, 22));

        contentPanel.add(num_answer);
        contentPanel.add(daan);
        contentPanel.add(dengyu);
        contentPanel.add(jta);

        contentPanel.add(jta_answer);
        contentPanel.add(answer_all);
        contentPanel.add(jb_next);

        num_answer.setBounds(90, 20, 130, 50);
        daan.setBounds(250, 20, 90, 50);
        jta.setBounds(50, 70, 150, 30);
        dengyu.setBounds(205, 70, 20, 20);
        jta_answer.setBounds(230, 70, 100, 30);
        jb_next.setBounds(350, 70, 110, 30);
        answer_all.setBounds(50, 120, 400, 300);

        this.setJMenuBar(jm); // 添加菜单栏,不能设定位置,会自动放在最上部
        this.add(contentPanel);

        this.setTitle("在线答题系统");
        this.setSize(600, 500);
        this.setVisible(true);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        item1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                FileOutputStream outSTr = null;
                BufferedOutputStream Buff = null;
                boolean flag = true;
                File file;
                // String test ;
                do {
                    // test = "test"+count;

                    String inputValue = JOptionPane.showInputDialog("Please input file name");
                    file = new File(inputValue + "test.txt");
                    if (!file.exists()) {
                        // 创建文件
                        try {

                            flag = file.createNewFile();

                        } catch (IOException e) {
                            e.printStackTrace();

                        }
                        flag = false;
                    } else {

                        JOptionPane.showMessageDialog(null, "该文件名已存在,请重新输入", "ERROR", JOptionPane.ERROR_MESSAGE);
                        flag = true;
                    }
                } while (flag);
                // 写入文件
                String u_answer;
                try {
                    outSTr = new FileOutputStream(file);
                    Buff = new BufferedOutputStream(outSTr);
                    System.out.println("选择是后执行的代码" + user_zongti.size() + user_answer.size());
                    for (int i = 0; i < user_zongti.size(); i++) {
                        try {
                            Buff.write(user_zongti.get(i).getBytes());
                            Buff.write("    ".getBytes());
                            u_answer = user_answer.get(i);
                            if (u_answer.equals(""))
                                u_answer = "没有作答";

                            Buff.write(u_answer.getBytes());
                            Buff.write("\r\n".getBytes());
                        } catch (IOException e) {
                            e.printStackTrace();
                            i--;
                        }
                    }
                    Buff.flush();
                    Buff.close();

                } catch (IOException e) {
                    e.printStackTrace();
                }
                try {
                    outSTr.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                user_zongti.clear();
                user_answer.clear();
            }
        });

        project.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                arithmetic art = new arithmetic();
                true_answer = art.list_answer;
                jta_timu = art.list_timu;
                jta_zong = art.list;
                answer_count = 1;
                answer_all.setText("");
                for (int i = 0; i < art.list_timu.size(); i++) {
                    user_zongti.add(jta_zong.get(i));
                    answer_all.append(jta_timu.get(i));
                    answer_all.append("\r\n");
                }
                num_answer.setText("第 " + answer_count + " 题");
                jta.setText(jta_timu.get(answer_count - 1));
                answer_count++;

            }
        });
        jb_next.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                String temp;
                temp = jta_answer.getText();

                if (jta.getText().equals("")) {
                    JOptionPane.showMessageDialog(null, "错误,请导入题库", "错误", JOptionPane.ERROR_MESSAGE);
                    return;
                }
                jta_answer.setText("");
                if (answer_count <= 10) {
                    if (isInteger(temp)) {

                        user_answer.add(temp);
                        System.out.println("选择否后执行的代码" + temp + "user_size" + user_answer.size());
                        num_answer.setText("第 " + answer_count + " 题");
                        jta.setText(jta_timu.get(answer_count - 1));
                        answer_count++;
                    } else {
                        JOptionPane.showMessageDialog(null, "错误", "请输入数字", JOptionPane.ERROR_MESSAGE);
                    }
                } else {
                    user_answer.add(temp);
                    System.out.println("选择否后执行的代码" + temp + "user_size" + user_answer.size());
                    answer_fenshu = 0;
                    for (int i = 0; i < user_answer.size(); i++) {
                        if (user_answer.get(i).equals(true_answer.get(i)))
                            answer_fenshu += 5;
                    }
                    user_fenshu.add(answer_fenshu);
                    Object[] options = { "是", "取消" };
                    int res = JOptionPane.showOptionDialog(null, "是否查看成绩", "答题完毕", JOptionPane.DEFAULT_OPTION,
                            JOptionPane.YES_NO_OPTION, null, options, options[0]);
                    if (res == JOptionPane.YES_OPTION) {
                        chart ct = new chart(user_fenshu);
                        ct.setVisible(true);

                    } else {
                        Object[] option = { "是", "取消" };
                        int res1 = JOptionPane.showOptionDialog(null, "是否退出程序", "终止框", JOptionPane.DEFAULT_OPTION,
                                JOptionPane.YES_NO_OPTION, null, option, option[0]);

                        if (res1 == JOptionPane.YES_OPTION) {
                            dispose();
                            System.exit(0);

                        } else {

                        }

                    }

                }

            }
        });

        item2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                dispose();
                System.exit(0);
            }
        });

    }

    public static boolean isInteger(String str) {
        for (int i = str.length(); --i >= 0;) {
            if (!Character.isDigit(str.charAt(i))) {
                return false;
            }
        }
        return true;
    }

}

 

package ui_test;

public class Main {

    public static void main(String[] args) {
        MyExGUI lg = new MyExGUI();
        //new MyExGUI();

    }

}

 

package ui_test;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;

public class arithmetic {
    ArrayList<String> list = new ArrayList<String>();
    ArrayList<String> list_timu = new ArrayList<String>();
    ArrayList<String> list_answer = new ArrayList<String>();

    public arithmetic() {
        FileOutputStream outSTr = null;
        BufferedOutputStream Buff = null;
        int number_n = 10, count;

        ArrayList<String> list_temp = new ArrayList<String>();
        String[] operator = new String[] { "+", "-", "*", "/" };

        Random rand = new Random();
        File file1 = new File("test.txt");
        if (file1.exists()) {
            // 创建文件
            try {
                file1.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        while (number_n > 0) {
            int[] number_temp = new int[rand.nextInt(2) + 3];
            String[] str_temp = new String[number_temp.length - 1];
            for (int i = 0; i < number_temp.length; i++) {
                if (i < number_temp.length - 1) {
                    number_temp[i] = rand.nextInt(100);
                    list_temp.add(String.valueOf(number_temp[i]));
                    str_temp[i] = operator[rand.nextInt(4)];
                    list_temp.add(str_temp[i]);

                }

                else {
                    number_temp[i] = rand.nextInt(100);
                    list_temp.add(String.valueOf(number_temp[i]));
                }
            }

            count = calculate_RPN(produce_RPN(list_temp));
            if (count != -1) {
                list_timu.add(transform_string(list_temp));
                list_answer.add(String.valueOf(count));
                list_temp.add(" = " + count);
                list.add(transform_string(list_temp));
                number_n--;
                list_temp.clear();
            } else
                list_temp.clear();
            System.out.println(number_n);

        }
        try {
            outSTr = new FileOutputStream(file1);
            Buff = new BufferedOutputStream(outSTr);
            for (int i = 0; i < list.size(); i++) {
                try {
                    Buff.write(list.get(i).getBytes());
                    Buff.write("\r\n".getBytes());
                } catch (IOException e) {
                    e.printStackTrace();
                    i--;
                }
            }
            Buff.flush();
            Buff.close();

        } catch (IOException e) {
            e.printStackTrace();
        }
        // Buff.close();
        try {
            outSTr.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        for (int i = 0; i < list.size(); i++) {
            System.out.print(list.get(i));
            System.out.println();
        }
        System.out.print("计算完毕!");

    }

    public static int calculate_RPN(ArrayList<String> list_temp) {
        int i = 0, t;
        double a = 0, b = 0;
        String l_temp;
        Stack sk = new Stack(10);
        for (t = 0; t < list_temp.size(); t++) {
            l_temp = list_temp.get(i++);
            if (!isInteger(l_temp)) {
                b = sk.mypop();
                a = sk.mypop();
                switch (l_temp) {
                case "+":
                    sk.mypush(a + b);
                    break;
                case "-":
                    if(!(a<b)) {
                    sk.mypush(a - b);
                    }
                    else
                        return -1;
                    break;
                case "*":
                    sk.mypush(a * b);
                    break;
                case "/":
                    if (b == 0||a<b)
                        return -1;
                    sk.mypush(a / b);
                    break;
                }
                System.out.println("st.mytop: " + sk.mypeek());
            } else {
                sk.mypush((double) Integer.parseInt(l_temp));
            }

        }
        if (!sk.myisempty()) {
            a = sk.mypop();
            b = a - (int) a;
            System.out.println("a:  " + a);
            if (a > 0 && b == 0) {
                return (int) a;
            } else
                return -1;
        } else
            return -1;

    }

    public static ArrayList<String> produce_RPN(ArrayList<String> list_temp) {
        int t = 0, i = 0;
        String tmp;
        Tack mytack = new Tack(10);
        ArrayList<String> lt_temp = new ArrayList<String>();
        while (true) {
            tmp = list_temp.get(i++);
            if (isInteger(tmp)) {
                lt_temp.add(tmp);
            } else {
                if (mytack.myisempty()) {
                    mytack.mypush(tmp);
                }

                else {
                    if (isCPriority(tmp, mytack.mypeek()))
                        mytack.mypush(tmp);
                    else {
                        lt_temp.add(mytack.mypop());
                        mytack.mypush(tmp);
                    }

                }
            }
            if (i >= list_temp.size()) {
                while (!mytack.myisempty())
                    lt_temp.add(mytack.mypop());
                System.out.println(transform_string(list_temp));
                list_temp = lt_temp;
                System.out.println(list_temp);
                return list_temp;
            }
        }

    }

    public static boolean isInteger(String str) {
        for (int i = str.length(); --i >= 0;) {
            if (!Character.isDigit(str.charAt(i))) {
                return false;
            }
        }
        return true;
    }

    public static boolean isCPriority(String str, String s) {
        if ((str + s).equals("*+") || (str + s).equals("*-") || (str + s).equals("/+") || (str + s).equals("/-"))
            return true;
        else
            return false;
    }

    public static String transform_string(ArrayList<String> list_temp) {
        String s = "";
        for (int i = 0; i < list_temp.size(); i++) {
            s += list_temp.get(i);
        }
        return s;

    }

    static class Stack {
        int mytop;
        double stk[];

        public Stack(int num) {
            mytop = -1;
            stk = new double[num];
        }

        /* 出栈 */
        double mypop() {
            double peek = stk[mytop];
            mytop--;
            return peek;
        }

        /* 入栈 */
        void mypush(double x) {
            mytop++;
            stk[mytop] = x;

        }

        /* 判空 */
        Boolean myisempty() {
            if (mytop == -1)
                return true;
            else
                return false;
        }

        /* 取栈顶元素 */
        double mypeek() {
            double peek = stk[mytop];
            return peek;
        }

        /* 栈大小 */
        int mysize() {
            return mytop + 1;
        }
    }

    static class Tack {
        int mytop;
        String tk[];

        public Tack(int num) {
            mytop = -1;
            tk = new String[num];
        }

        /* 出栈 */
        String mypop() {
            String peek = tk[mytop];
            mytop--;
            return peek;
        }

        /* 入栈 */
        void mypush(String x) {
            mytop++;
            tk[mytop] = x;

        }

        /* 判空 */
        Boolean myisempty() {
            if (mytop == -1)
                return true;
            else
                return false;
        }

        /* 取栈顶元素 */
        String mypeek() {
            String peek = tk[mytop];
            return peek;
        }

        /* 栈大小 */
        int mysize() {
            return mytop + 1;
        }

    }

}

 

package ui_test;

import java.awt.Color;  
import java.awt.Graphics;  
import java.awt.Graphics2D;
import java.util.ArrayList;
import java.util.Random;  
  
import javax.swing.JFrame;
  
public class chart extends JFrame{
      //绘制柱形统计图  
        ArrayList<Integer> ran=new  ArrayList<Integer>();
        public chart(ArrayList<Integer> scores)
        {  
            super();  
            getContentPane().setForeground(Color.CYAN);
            setForeground(Color.CYAN);
            setBackground(Color.CYAN);
            for(int i=0;i<scores.size();i++)
            {
                ran.add(scores.get(i));
                System.out.println(scores.get(i));
            }
              
            setTitle("绘制柱形图");  
            setSize(600, 400);
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
        }  
        @Override  
        public void paint(Graphics g){
            int Width = getWidth();
            int Height = getHeight();
            int leftMargin = 20;//柱形图左边界
            int topMargin = 50;//柱形图上边界
            Graphics2D g2 = (Graphics2D) g;
            g2.setColor(Color.WHITE);//绘制白色背景
            g2.fillRect(0, 0, Width, Height-100);//绘制矩形图
            g2.setColor(Color.black);
             for(int i=0;i<=10;i++)
             {
                 //绘制灰色横线和百分比
                 g2.drawString((100-10*i)+" ", 15, topMargin+30*i);
                 g2.drawLine(10, topMargin+30*i, Width, topMargin+30*i);//绘制灰色横线
             }
             g2.setColor(Color.RED);
             for(int i=0;i<=ran.size();i++)
             {
                 //绘制柱形图
                 int step = (i+1)*40;//设置每个柱形图的水平间隔为40
                 //绘制矩形
                 g2.fillRoundRect(leftMargin+step*2-5,(100-ran.get(i))*3+50, 40, 300-(100-ran.get(i))*3, 40, 10);
                 //列出测试轮数
                 g2.drawString("第"+(i+1)+"轮", leftMargin+step*2, 380);
             }    
         }  

    
}

 

运行结果:

选择答题:

 

答题完毕后,按照提示可查询成绩:

点击文件菜单中的“保存”选项,可保存答题记录:

正确答案:

答题记录:

 

三:实验总结。

       最近学习的都是基于图形用户界面的知识内容,即采用图形方式显示的计算机操作用户界面,相比使用命令行,图形界面更清晰明了。但在学习过程中,出现了很多问题,相比之前学习时只学习一个点的知识内容,现在的需要结合各种内容在一起,就要比以前学的复杂而且感觉不太好理解。课后自己运行程序时,对一些程序还不理解,希望老师能多讲解一下程序,自己也会继续学习。

 

posted @ 2018-12-09 14:31  JAVA!!  阅读(263)  评论(0编辑  收藏  举报