201871010101-陈来弟《面向对象程序设计（JAVA）》 第13周学习总结

201871010101-陈来弟《面向对象程序设计（JAVA）》 第13周学习总结

实验十一 图形界面事件处理技术

实验时间 2019-11-22

第一部分：理论知识

一、事件处理

1.事件源：能够产生事件的对象都可以成为事件源，如文本框，按钮等。一个事件源是一个能够注册监听器并向监听器发送事件对象的对象。

2.事件监听器：事件监听器对象接收事件源发送的通告（事件对象），并对发生的事件作出响应。一个监听器对象就是一个实现了专门监听器接口的类实例，该类必须实现接口中的方法，这些方法当事件发生时，被自动执行。

3.事件对象：Java将事件的相关信息封装在一个事件对象中，所有的事件对象都最终被派生于Java.util.EventObject类。不同的事件源可以产生不同类别的事件。

2.AWT事件处理机制的概要;

监听器对象 :是一个实现了特定监听器接口 （ listener interface ）的类实例 。

当事件发生时，事件源将事件对象自动传递给所有注册的监听器 。

监听器对象利用事件对象中的信息决定如何对事件做出响应。

3.事件源与监听器之间的关系：

4.GUI设计中，程序员需要对组件的某种事件进行响应和处理时，必须完成两个步骤;

（1）定义实现某事件监听器接口的事件监听器类，并具体化接口中声明的事件的处理抽象方法。

（2）为组件注册实现了规定接口的事件监听器对象；

事件：用户对程序的某一种功能性操作。

Java中的事件主要有两种：

1．组件类事件

componentEvent、ContainerEvent、WindowEvent、FocusEvent、PaintEvent、MouseEvent共六大类，

它们均是当组件的状态发生变化时产生。

2．动作类事件

ActionEvent、TextEvent、AdjustmentEvent、ItemEvent共四类。

它们均对应用户的某一种功能性操作动作。

Java中的事件类都包含在JDK的 Java.awt.event包中。

2）事件编程：

用户编程定义每个特定事件发生时程序应做出何种响应，并且这些响应代码会在对应的事件发生时由系统自动调用。

3）事件委托授权处理模型

JDK1.1以上版本实现了事件委托授权处理模型的机制。

① 事件源：产出事件的组件。

② 监听器：对组件所产生的事件作出具体响应的代吗，即事件产出与处理分别由两个不同类（它们可以分别放在不同的程序中）加以编程实现。

③ 事件处理机制：AWT组件自身不编程处理相应的事件，面是交由事件监听器（它可以是组件所在的容器类或另外的Java程序类，只要它们实现了相关的事件监听器接口即可）处理（事件授权处理模型）。

④ 事件处理的包：java.awt.event包，它提供AWT事件所需的类和接口

ActionEvent类对应ActionListener接口；

MouseEvent类对应MouseMotionListener接口和MouseListener接口；

WindonEvent类对应WindonListener接口---即发生了XXXEvent类型的事件，那么处理该事件的接口为XXXListener）；它们的父类为EventObject类。

各个事件类的说明：

EventObject：所有事件类的超类

最重要的方法-- getSource()，返回产生某事件的对象

AWTEvent：所有AWT事件类的超类

最重要的方法-- getID()，返回某事件的ID号，事件的ID是一个整数，它指定事件的类型，例如按钮事件或鼠标点击事件

ActionEvent：激活组件时发生的事件

AdjustmentEvent：调节可调整的组件（如移动滚动条）时发生的事件

ComponentEvent：操纵某组件时发生的一个高层事件

ContainerEvent：向容器添加或删除组件时发生

InputEvent：由某输入设备产生的一个高层事件

ItemEvent：从选择项，复选框或列表中选择时发生

KeyEvent：操作键盘时发生

MouseEvent：操作鼠标时发生

PaintEvent：描绘组件时发生的一个事件

TextEvent：更改文本时发生

WindowEvent：操作窗口时发生的事件，如最大化或最小化某一窗口。

4）事件编程的基本原则：

事件处理的类代码要对某一类事件加以处理，则应实现它们所对应的接口，并且给出该接口中定义的全部事件响应函数的功能实现（重写其函数体）；然后在创建组件时注册该事件的监听器（响应者）。

5）事件注册：

事件源通过对特定的事件进行注册，以指定该事件的监听器（响应者）是谁。

6）事件注册函数：

函数名由“add + 事件类型对应的监听器接口名称”组成；函数参数为监听器对象（实现事件响应的类的对象，如容器组件自身响应该事件，则监听器对象应用this代表）。

public void add< listenerType >(< listenerType > ListenerObj)

{

}

7）事件编程的基本规则：

（1）组件对事件的响应形式：忽略它（本类不实现对应的监听器接口）或编程事件函数以处理它（可根据应用需要替换某一个组件的相应缺省事件处理函数，从而响应用户对该组件的操作。本类实现某类事件对应的监听器接口，并实现对应的响应函数），也可屏蔽它（将其事件响应函数体置空）。

（2）事件响应类（监听器）可以实现多个监听器接口，以响应多组不同事件，从而可使同一个组件可以注册多种事件。

（3）利用事件响应函数中的事件对象获取事件产生时的相关信息（event.getSource()）事件源对象，event.getX(), event.getY(),事件产生时的鼠标位置，event.getActionCommand()，获取组件的字符串名称。

5.注册监听器方法:eventSourceObject.addEventListener（eventListenerObject）

6.动态事件：当特定组件动作（点击按钮）发生时，该组件生成此动作事件。该事件被传递给组件注册的每一个ActionListener对象，并调用监听器对象的actionPerformed方法以接受这类事件对象。能够触发事件动作的动作，主要包括:

（1）点击按钮

（2）双击一个列表中的选项

（3）选择菜单项

（4）在文本框中输入回车

7.监听器接口的实现

监听器类必须实现与事件源相对应的接口，即必须提供接口中方法的实现。监听器接口的方法实现

class MyListener implenments ActionListener

{

public void actionPerformed（ActionEvent event）

{......}

}

8.命令按钮Jbutton主要API

（1）创建按钮对象

Jbutton类常用的一组构造方法;

(1) JButton(String text)：创建一个带文本的按钮。
(2) JButton(Icon icon) ：创建一个带图标的按钮。
(3)JButton(String text, Icon icon) ：创建一个带文本和图标
的按钮

（2）按钮对象的常用方法：

① getLabel( )：返回按钮的标签字符串；
② setLabel(String s)：设置按钮的标签为字符串s。

9. 用匿名类、lambda表达式简化程序

例ButtonTest.java中，各按钮需要同样的处理：
1) 使用字符串构造按钮对象；
2) 把按钮添加到面板上；
3) 用对应的颜色构造一个动作监听器；
4) 注册动作监听器

10.适配器类

当程序用户试图关闭一个框架窗口时，Jframe对象就是WindowEvent的事件源。
⚫ 捕获窗口事件的监听器：

WindowListener listener=…..;
frame.addWindowListener(listener);
⚫ 窗口监听器必须是实现WindowListener接口的
类的一个对象，WindowListener接口中有七个
方法，它们的名字是自解释的。

11.鉴于代码简化的要求，对于有不止一个方法的AWT监听器接口都有一个实现了它的所有方法，但却不做任何工作的适配器类。例：WindowAdapter类。适配器类动态地满足了Java中实现监视器类的技术要求。

⚫ 通过扩展适配器类来实现窗口事件需要的动作

12.注册事件监听器

可将一个Terminator对象注册为事件监听器：WindowListener listener=new Terminator();frame.addWindowListener(listener);
⚫ 只要框架产生一个窗口事件，该事件就会传递给监听器对象。创建扩展于WindowAdapter的监听器类是很好的改进，但还可以进一步将上面语句也可简化为：frame.addWindowListener(new Terminator());

13.动作事件

（1）激活一个命令可以有多种方式，如用户可以通过菜单、击键或工具栏上的按钮选择特定的功能。

（2）在AWT事件模型中，无论是通过哪种方式下达命令（如：点击按钮、菜单选项、按下键盘），其操作动作都是一样的。

14.动作接口及其类

Swing包提供了非常实用的机制来封装命令，并将它们连接到多个事件源，这就是Action接口。

⚫ 动作对象是一个封装下列内容的对象：
–命令的说明：一个文本字符串和一个可选图标；
–执行命令所需要的参数。

⚫ Action是一个接口，而不是一个类，实现这个接
口的类必须要实现它的7个方法。
⚫ AbstractAction 类 实 现 了 Action 接 口 中 除actionPerformed方法之外的所有方法，这个类存储了所有名/值对，并管理着属性变更监听器。在 动 作 事 件 处 理 应 用 中 ， 可 以 直 接 扩 展AbstractAction 类 ， 并 在 扩 展 类 中 实 现
actionPerformed方法。

15.鼠标事件

用户点击鼠标按钮时,会调用三个监听器方法：
– 鼠标第一次被按下时调用mousePressed方法；
– 鼠标被释放时调用mouseReleased方法；
– 两个动作完成之后,调用mouseClicked方法。
⚫ 鼠标在组件上移动时,会调用mouseMoved方法。

如果鼠标在移动的时候还按下了鼠标,则会调用mouseDragged方法

⚫ 鼠标事件返回值
– 鼠标事件的类型是MouseEvent，当发生鼠标事件时：MouseEvent类自动创建一个事件对象，以及事件发生位置的x和y坐标，作为事件返回值。

第二部分：实验部分

1、实验目的与要求

(1) 掌握事件处理的基本原理，理解其用途；

(2) 掌握AWT事件模型的工作机制；

(3) 掌握事件处理的基本编程模型；

(4) 了解GUI界面组件观感设置方法；

(5) 掌握WindowAdapter类、AbstractAction类的用法；

(6) 掌握GUI程序中鼠标事件处理技术。

2、实验内容和步骤

实验1： 导入第11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443页-444页程序11-1，结合程序运行结果理解程序；

l 在事件处理相关代码处添加注释；

l 用lambda表达式简化程序；

l 掌握JButton组件的基本API；

l 掌握Java中事件处理的基本编程模型。

 11-1 代码：

 1 package button;

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

 /**
  * A frame with a button panel.带纽带面板的框架
  */
 public class ButtonFrame extends JFrame
 {
    private JPanel buttonPanel;//定义Jpanel属性
    private static final int DEFAULT_WIDTH = ;
    private static final int DEFAULT_HEIGHT = ;

    public ButtonFrame()
    {
       setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);//通过setSize更改了宽度和高度的属性值

             //创建按钮         生成了三个按钮对象，显示在窗口对象上的title文本
       JButton yellowButton = new JButton("Yellow");
       JButton blueButton = new JButton("Blue");
       JButton redButton = new JButton("Red");

       buttonPanel = new JPanel();//使new JPanel指向对象buttonPanel

       // 向面板添加按钮      通过add方法添加三个按钮组件
       buttonPanel.add(yellowButton);
       buttonPanel.add(blueButton);
       buttonPanel.add(redButton);

       // 将面板添加到帧
       add(buttonPanel);

       // 创建按钮动作
       ColorAction yellowAction = new ColorAction(Color.YELLOW);
       ColorAction blueAction = new ColorAction(Color.BLUE);
       ColorAction redAction = new ColorAction(Color.RED);

       //用按钮关联动作   监听器对象与组件之间的注册机制
       yellowButton.addActionListener(yellowAction);
       blueButton.addActionListener(blueAction);
       redButton.addActionListener(redAction);
    }

    /**
     * An action listener that sets the panel's background color.
     */
    private class ColorAction implements ActionListener
    {
       private Color backgroundColor;

       public ColorAction(Color c)
       {
          backgroundColor = c;
       }

       public void actionPerformed(ActionEvent event)
       {
          buttonPanel.setBackground(backgroundColor);
       }
    }
 }

 package button;

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

 /**
  * @version 1.35 2018-04-10
  * @author Cay Horstmann
  */
 public class ButtonTest
 {
    public static void main(String[] args)//String类代表字符串。Java 程序中的所有字符串字面值（如 "abc" ）都作为此类的实例实现。
    {
       EventQueue.invokeLater(() -> {
          ButtonFrame frame = new ButtonFrame();//生成ButtonFrame对象
          frame.setTitle("ButtonTest");//设置组建的自定义标题测试按钮
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置默认的关闭操作，参数在关闭动作时退出
          frame.setVisible(true);//一个图形界面默认都是不可见的，setVisible把图形界面设置为可见
       });
    }
 }

程序的运行结果如图：

改进代码：

 package button;

  import java.awt.*;
   import java.awt.event.*;
   import java.nio.charset.CodingErrorAction;
   import java.util.Collection;

   import javax.swing.*;

  /**
   * 带按钮面板的框架
   */
  @SuppressWarnings("serial")
  public class ButtonFrame extends JFrame {
      private JPanel buttonPanel;// 定义JPanel属性
      private static final int DEFAULT_WIDTH = ;
      private static final int DEFAULT_HEIGHT = ;

      public ButtonFrame() {
          setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);// 通过setSize更改了宽度和高度的属性值
          buttonPanel = new JPanel();// 使new JPanel指向对象buttonPanel

          // 将面板添加到帧         add(buttonPanel);
          makeButton1("Yellow", Color.yellow);
          makeButton1("White", Color.white);
          makeButton1("Black", Color.black);         makeButton1("Green", Color.green);
          makeButton1("Pink", Color.pink);
          makeButton1("Blue", Color.blue);
          makeButton1("Gray", Color.gray);
          makeButton1("Red", Color.red);
      }

      public void makeButton1(String name, Color backgroundColor) {
          JButton button = new JButton(name);         buttonPanel.add(button);
          button.addActionListener(new ActionListener() {

              @Override
              public void actionPerformed(ActionEvent e) {
                  buttonPanel.setBackground(backgroundColor);
              }
          });

      }
  }

其结果：

aaarticlea/png;base64,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" alt="" />

测试程序2：

l 在elipse IDE中调试运行教材449页程序11-2，结合程序运行结果理解程序；

l 在组件观感设置代码处添加注释；

l 了解GUI程序中观感的设置方法。

代码：

 package plaf;

  import javax.swing.JButton;
  import javax.swing.JFrame;
  import javax.swing.JPanel;
  import javax.swing.SwingUtilities;
  import javax.swing.UIManager;

  /**
  * 带有按钮面板的框架，用于改变外观和感觉
  */
 public class PlafFrame extends JFrame
 {
    private JPanel buttonPanel;

    public PlafFrame()
    {
       buttonPanel = new JPanel();//实例化一个新的JPanel 

       //获取所有的显示样式UIManager.setLookAndFeel(infos[0].getClassName())
       UIManager.LookAndFeelInfo[] infos = UIManager.getInstalledLookAndFeels();
       for (UIManager.LookAndFeelInfo info : infos)
          makeButton(info.getName(), info.getClassName());

       add(buttonPanel);//增加按键点击事件
       pack();
    }

    /**
     * 制作一个按钮来改变可插入的外观和感觉。
     * @param name the button name
     * @param className the name of the look-and-feel class
     */
    private void makeButton(String name, String className)
    {
       // 向面板添加按钮 

       JButton button = new JButton(name);
       buttonPanel.add(button);

       // 设置按钮动作 

       button.addActionListener(event -> {
          // 按钮动作：切换到新的外观和感觉
          try
          {
             //设置成你所使用的平台的外观。  java的图形界面外观有3种,默认是java的金属外观,还有就是windows系统,motif系统外观.
             UIManager.setLookAndFeel(className);
             //简单的外观更改：将树结构中的每个节点转到 updateUI() 也就是说，通过当前外观初始化其 UI 属性。
             SwingUtilities.updateComponentTreeUI(this);
             pack();//依据放置的组件设定窗口的大小, 使之正好能容纳放置的所有组件
          }
          catch (Exception e)//抛出异常
          {
            e.printStackTrace();//深层次的输出异常调用的流程。
          }
          });
    }
 }

package plaf;

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

  /**
   * @version 1.32 2015-06-12
   * @author Cay Horstmann
   */
 public class PlafTest
 {
    public static void main(String[] args)
    {
       EventQueue.invokeLater(() -> {
          JFrame frame = new PlafFrame();//生成PlafFrame对象
          frame.setTitle("PlafTest");//设置组建的自定义标题测试按钮
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置默认的关闭操作，参数在关闭动作时退出
          frame.setVisible(true);//一个图形界面默认都是不可见的，setVisible把图形界面设置为可见
       });
    }
 }

运行结果：

测试程序3：

l 在elipse IDE中调试运行教材457页-458页程序11-3，结合程序运行结果理解程序；

l 掌握AbstractAction类及其动作对象；

l 掌握GUI程序中按钮、键盘动作映射到动作对象的方法。

package action;

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

/**
 * A frame with a panel that demonstrates color change actions.
 */
public class ActionFrame extends JFrame
{
   private JPanel buttonPanel;
   private static final int DEFAULT_WIDTH = ;
   private static final int DEFAULT_HEIGHT = ;

   public ActionFrame()
   {
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

      buttonPanel = new JPanel();

      // define actions
      ColorAction yellowAction = new ColorAction("Yellow", new ImageIcon("yellow-ball.gif"),
            Color.YELLOW);
      ColorAction blueAction = new ColorAction("Blue", new ImageIcon("blue-ball.gif"), Color.BLUE);
      ColorAction redAction = new ColorAction("Red", new ImageIcon("red-ball.gif"), Color.RED);

      // add buttons for these actions
      buttonPanel.add(new JButton(yellowAction));
      buttonPanel.add(new JButton(blueAction));
      buttonPanel.add(new JButton(redAction));

      // add panel to frame
      add(buttonPanel);

      // associate the Y, B, and R keys with names
      InputMap inputMap = buttonPanel.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
      inputMap.put(KeyStroke.getKeyStroke("ctrl Y"), "panel.yellow");
      inputMap.put(KeyStroke.getKeyStroke("ctrl B"), "panel.blue");
      inputMap.put(KeyStroke.getKeyStroke("ctrl R"), "panel.red");

      // associate the names with actions
      ActionMap actionMap = buttonPanel.getActionMap();
      actionMap.put("panel.yellow", yellowAction);
      actionMap.put("panel.blue", blueAction);
      actionMap.put("panel.red", redAction);
   }

   public class ColorAction extends AbstractAction
   {
      /**
       * Constructs a color action.
       * @param name the name to show on the button
       * @param icon the icon to display on the button
       * @param c the background color
       */
      public ColorAction(String name, Icon icon, Color c)
      {
         putValue(Action.NAME, name);
         putValue(Action.SMALL_ICON, icon);
         putValue(Action.SHORT_DESCRIPTION, "Set panel color to " + name.toLowerCase());
         putValue("color", c);
      }

      public void actionPerformed(ActionEvent event)
      {
         Color color = (Color) getValue("color");
         buttonPanel.setBackground(color); // 调用setBackground方法，设置背景颜色
      }
   }
}

package action;

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

/**
 * @version 1.34 2015-06-12
 * @author Cay Horstmann
 */
public class ActionTest
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(() -> {
         ActionFrame frame = new ActionFrame();//生成ActionFrame对象
         frame.setTitle("ActionTest");
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置默认的关闭操作
         frame.setVisible(true);//一个图形界面默认都是不可见的，setVisible把图形界面设
      });
   }
}

其结果:

AbstractAction类的简单认识

<br><br>AbstractAction类是Action接口的抽象实现。AbstractAction为Action接口中的大多数方法提供了默认功能，我们可以扩展AbstractAction类来建立自定义的特定动作。由此，必须为接口的实现提供唯一的方法：<br>actionPerformed（）方法。我们可以在actionPerformed（）方法中提供我们想要的功能。以下是个简单例子：

class MyAction extends AbstractAction{

public MyAction(String name,Icon icon){

super(name,icon);

}

public void actionPerformed(ActionEvent e){

System.out.println("Action:"+e.getActionCommand());

}

}

测试程序4：

l 在elipse IDE中调试运行教材462页程序11-4、11-5，结合程序运行结果理解程序；

l 掌握GUI程序中鼠标事件处理技术。

package mouse;

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.util.*;
import javax.swing.*;

/**
 * A component with mouse operations for adding and removing squares.
 */
public class MouseComponent extends JComponent
{
   private static final int DEFAULT_WIDTH = ;
   private static final int DEFAULT_HEIGHT = ;

   private static final int SIDELENGTH = ;//定义创造的正方形的边长
   private ArrayList<Rectangle2D> squares;//声明一个正方形集合
   private Rectangle2D current; // Java类库中用来描述矩形的类，它的对象可以看作是一个矩形

   public MouseComponent()
   {
      squares = new ArrayList<>();
      current = null;

      addMouseListener(new MouseHandler());
      //添加一个我们实现的类，这个类继承了监测鼠标点击情况的MouseListener
      addMouseMotionListener(new MouseMotionHandler());
      // 添加另一个实现类，这个类继承了监测鼠标移动情况的MouseMotionListener

   }

   public Dimension getPreferredSize()
   {
      return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT);
   }   

   public void paintComponent(Graphics g)
   {
      Graphics2D g2 = (Graphics2D) g;// 转换为我们需要使用的类

      // draw all squares
      for (Rectangle2D r : squares)
         g2.draw(r);
   }

   /**
    * Finds the first square containing a point.
    * @param p a point
    * @return the first square that contains p
    */
   public Rectangle2D find(Point2D p)
   {
      for (Rectangle2D r : squares)
      {
         if (r.contains(p)) return r;
      }
      return null;
   }

   /**
    * Adds a square to the collection.
    * @param p the center of the square
    */
   public void add(Point2D p)
   {
      double x = p.getX();
      double y = p.getY();
    //获取x和y的坐标
      current = new Rectangle2D.Double(x - SIDELENGTH / , y - SIDELENGTH / ,
         SIDELENGTH, SIDELENGTH);
    //用获得的坐标和既定的边长构建一个新的正方形，并将其赋值给current

      squares.add(current);//将current添加到squares队列中
      repaint();//重绘图像
   }

   /**
    * Removes a square from the collection.
    * @param s the square to remove
    */
   public void remove(Rectangle2D s)
   {
      if (s == null) return;//如果要移除的内容为空，直接返回
      if (s == current) current = null;
    //如果要移除的内容和current正指向的内容相同，则将current清空
    //避免发生不必要的错误

      squares.remove(s);//将s从squares的列表中直接删去
      repaint();//重绘component的方法
   }

   private class MouseHandler extends MouseAdapter
   {
      public void mousePressed(MouseEvent event)//鼠标按下方法
      {
         // 如果光标不在正方形中，则添加一个新的正方形
         current = find(event.getPoint());
      // 将鼠标单击的这个点的坐标的对象赋给current
         if (current == null)
            //如果这个点没有对象，当前指向空的位置
             add(event.getPoint());
      }

      public void mouseClicked(MouseEvent event)//鼠标按下方法
      {
         // 如果光标不在正方形中，则添加一个新的正方形中
         current = find(event.getPoint());
         //将鼠标单击的这个点的坐标的对象赋给current
         if (current != null && event.getClickCount() >= ) remove(current);
      }
   }

   private class MouseMotionHandler implements MouseMotionListener
   {
      public void mouseMoved(MouseEvent event)
      {
         // set the mouse cursor to cross hairs if it is inside a rectangle

         if (find(event.getPoint()) == null) setCursor(Cursor.getDefaultCursor());
         else setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
      }

      public void mouseDragged(MouseEvent event)
      {
         if (current != null)
         {
             //因为在调用这个方法之前肯定会调用点击鼠标的方法
             //所以我们直接判断：如果现在current不为空
             //像素（强制转换为int）
            int x = event.getX();
            int y = event.getY();
           //获取带坐标

            // drag the current rectangle to center it at (x, y)
            current.setFrame(x - SIDELENGTH / , y - SIDELENGTH / , SIDELENGTH, SIDELENGTH);
            //最后在鼠标放下时进行图形绘制
            repaint();
         }
      }
   }
}

package mouse;

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

/**
 * @version 1.35 2018-04-10
 * @author Cay Horstmann
 */
public class MouseTest
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(() -> {
         MouseFrame frame = new MouseFrame();//生成MouseFrame对象
         frame.setTitle("MouseTest");//设置组建的自定义标题测试按钮
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置默认的关闭操作，参数在关闭动作时退出
         frame.setVisible(true);//一个图形界面默认都是不可见的，setVisible把图形界面设置为可见
      });
   }
}

package mouse;

import javax.swing.*;

/**
 * A frame containing a panel for testing mouse operations
 */
public class MouseFrame extends JFrame
{
   public MouseFrame()
   {
      add(new MouseComponent());//向框架中添加一个JComponent的实例
      pack();//依据放置的组件设定窗口的大小, 使之正好能容纳放置的所有组件
   }
}

其结果：

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xARJ1KhXqU4h82TiSbmj5x1Wuyr+wzTDgfFjPdDsbQJaLOp/8ADBQPxWfNhQKTQwewD4Mw66mmV/XnzharJTc8ObYbDF0i6lTCtd/1GuqZLavUm7wUeTWDqcNQahDbXttyRq244+LYhzaa111g6BJRp9R/2hI8JcLRVNd9DXjIdlJs3HzzdrnNw/KCPLYsRZiOfWC8Klu4Z7EKatmphQsXYvny5WqNiMi/paSkYP369WrN/zB0feSuu+5SSy3bvn27WiKi1vL30GV5wYdkmLbUiKhzY+gSEfkQQ5eIyIeCvvzyS7hr9fX1aigRkf+TmeUsy/ylBTU2NsJda+E8GxGRX5GZ5SzL/KVZqq7Uu03VJU8uwjPPrFBr1Fby6gVPTpR5Oo46B17V4n0rVjyDNb/6tVrzP6zpEl1ltitX3DXqPILkNLelRkQUKJxlmD+1IKe9xkZEFGicZZmftBZnuuQ9sn7XUiOi9nOWZf7SONP1EWd1OleNiNrJWZb5SRMzXfe/6NrmbDbuqhH5C2OG+duvlme6stE1zdls3LER+Q1nGeZHjVcvEFGn4izD/KkFyTecuWtERIHGWZb5S+ObI4iuMmf1ccdGnQdnukRXkbP6uKtGnnOWZcb23Sd/7LTfF03MdMXvLTYiokDhLMPMrb6h1r5ceqEMT6xZYtrekc00071/5bvNWtbh02IgEVFgMGaaq1Zytti+XHD6BC5cKDFt78hmqumG9YlA3ym3mVrXqH5qKxFR4MvMOYyQkV/DI/+zHgfyjmDl/67Bk/+9UG3teKaZrsViQXVOjqk1VFaqoUREgcGYa7J9f0kivvfkjzDv8e9i1ebNSL5vMrr3uojV770Hy4jx+OvhQ/jo4D58f+EP8JAYW3jmVLNjeKtZzlfUigfdwU33os+szbhU06B6gJdXL8ELz6eoNbrWtObMOU/2kD9Y9sun8eyqdWpNd/Z8ib7Q2IiHN6RjaP9KlFwowtLvLEFtQw3+dfgodhwoxPduGYchPXrjV6/+Bo1i+M7fbdH3cyN6RH9UVJSrteZ69OiJwlPn1ZoI3bLyptDd86c56HXPm7hxaJjqAZYsWoiUFbwFOxEFBhm6KSvNoWv0btY/8VLmbvzfY/ciIqwHuoV2RcWVMvwn73O8+O4RvJGUjAHh4Wp0yy5d+hJxN4zQHh3JwD1xsilwJdNnL9TU87JdIgpschZpzDXjr8/ycvDnd19DTW0DgoMbUCdmuZ+e+BRVNVUY0b8nJt4QhpR33jLs0fKvsB498Mm+XC1gjeR6XsFZw0j9l+mzF2oagrXBREQBy5BpxvaDpYlY8eJqPPGDxzAwMhz/zv0cl+suokuXYOw4mInSi2X4yrAuOHqyGFO/fwfuf+I7OFl8yumxHFu/flHYs++IPXjlY37BOYQEhzQba/rshZp6hi4RBT5jrtna2kUr8eqzLyH+q/G476YbseFvnyHvXAEacAV9w3vjg/3bUVl9Hhcv12HnGzvx+A8fw9LUFU6P5az16dcP/1Ez3jwRuEHBwU7HmeoJDF0i6qz694lCr569teXX31iPb8RGY80fPsfOg3moaaxFZK8obN5Rinm3Jmhjbo3/Bl74RetucClnvMeLyhAsAtcV0yVjNQ3mmq7VKs/fyWwmIgocxlxz1qrravHjaXdh3YMP4tPDoVj1u2K8sy0E354wA4mi3zYuvGe4aT9vNFPKVttmutZ6BDVUIKS+BJbGK3ofEVEnsfSRJVj58mqMGzEcby5KRmz1cez9zRokf2sWunftqkZ1DDHTtYr01VudmOke/kcq/vzKL5Gb9VuUfPEXXK48pYYSEfk/MZm0Z5qrNiZ6jDbbta1fqq1G4elC05iOaqaZ7v0PrsLUux/Crfc8ggHR9yA44lYEd+uvthIRdQ59I/rg14ufV2vAgu89jCd//UvUiiDuaKaabljPPlq7rscABHcfrbWgYPO1Z0REfs2Qaa5aUFAw+oT3sa/fe9dsvLVuI0JDupjGdUTj7XqIqFNxlmH+1HgLdiLqfJxlmZ+0Fme6RESBxlmW+UsTM13x4K5pw4iIAoVDhvlZ40yXiDodZ1nmL63lmq5sRESBwlmG+VHj1QtE1Kk4yzB/apai4ivy0aWVzzyJNaufUWtE3se7U5A3LfnFCixb8Su15n/4qeXkF2SYttSIOgNL7tFTbme6655/FuvWPqfWiLxPznQ9CVVPx9G1beHChXj88cfVmv+xHDl5wW3orn12GdatWanWiLyPoUvetGjJL7HwqVVqzf8EBVnEb26aRTQiIvKOIItIVXdNxK4+koiI2k2Erj6bddnUQCIiar8gmbruGlOXiMh7WgxdZi4RBRInH3fgV03kavM6rrGJ39S3QkRE7dVi6DJyyRfk5WAtNaLOwHKy5Esx4dWtW5eGn/0sSa3pnl2xFGtWpag1IiL/9tOfy+t0O/a9BYWbbldLzYV064mob6YhtPdI1WMWZAkSs1nVJOP6qbd+gsvHP9L6iYhI12C14O7kvU5b1IBonNnxOKpLc9RoM9ObI7QOw3r9+QKE9IzQNxARkaa+0YJGK5y28H7DMHBILE7/cwmuOAleU01Xev75VHvL/OQMyoqKtH4iItLJ0G1oFDNeQ5u38h38JO3vCArtrgXvkKGxKMz8udqjibwqTARu00UKS5cutLeRUd0ROWSovoGIKEA4u1TLsbWHPtO1mtrZ8i+RW1SKvjcvQv9Jv8RX/uu3qK2tVXs0MV2nq3UY1sN6ReDS2dNaPxFRZyKDt61NC10xuzU2G2OfHOe4r9vQ/eaq7RgwnpfqEBEZNcjygkhQY7Mx9YtxjrSstTXJuH5sYyK+zM/WNxARBQQZgJ601hsRFYbo+j2471uPokdtEbqFBmkz2ouX9TJCj25dzDNdqwpWAxG65hNpxvXasuMI5tULREToEhKEMFThwr6N6BrZDecyn0XX4EbtioXSysvamJ5hXbV1W5PlBUfNLhl75tl19rY1+xRKiwr1DURE17C+Pbui4rNNqOvRH6ufWo36Lj3x5RcZOJh/Cite36aNueUrw8QM12pvTkPX+GYIKeXpxfY2bmgvRI0YpfUTEXUussTgeesVXIXy3AyERvbG4f2H0C92OMr2v4FRUd3RIAL2zvjRmDvlRjSI4bamh27TMWRzeyItNCwclac40yWiwCLPa7XUWuvCgT/gun4R6BvegPk/ugehQVUI6d4V4ef/hVcW3Y9HZk1Cl5CQlme6xpDVOgzr96zLxOAJd2v9REQBQ8ZZC03mbmta5fFs9B44QOzaBadOnkdwSDdEDhuMC0cyTHVcY9MuGXM4juVydZ18dOnnT/4Mzzy9Qq0REfm3n/58GZKWev8Dbxr+NhsxkyahZ/+BKC4uw8CBfXG+4BiO7DuAXcVBalRz337sPbWks1ypqXcbuk8uXsTQJaKA0WGhW7gD9Z+shbWh6V1mQd3CETLxZwgaPFn1tMxUXnDW5EyciOhaFzz8TnS9/wN0+84ue+sy+6+tClxJ5ircNaYuEZH3iNBtejOE08bUJSLyGtObI5w1IiLynpZnugxeIiKvsVgFtezUwoULsXz5crVGROTffvL/FmL+jx5Xa/6HoUtEnUpKSgrWr1+v1vwPQ7cTas3tyrdv366WiDoHhi75nAxdT8LU03FEgeQXy1Pw9OrfqDX/4/q9a0RE5HUMXSIiH2LoEhH5EEOXiMiHGLpERD7E0CUi8iGGLhGRDzF0iahTKdn/NgYkbVVryrZHMKBXkKE9gky1yc5xjOMxlBMvTda2z3rpmOppHYZuJyXf+NBSI7omHEvDrDnp+MHmRpy9aGv/h6lqs0YG7hzgTfv29/GD12a6DN724DvSiNqhNT+8+O4/33h41lj85fpXcDZtut6hBepnSDmQhcRovcvsGNLvjMXf7svDlkebBsgZ7aQlXxVB7BDQ7cSZLlE7yTBtqdFVNG0xUr72EZaPl2WDyUhvVhU4irxPgL1LYk3lhUlLPlLbvYuhS0SdXDQSd8iSQZ7b8DWXH2zNu7NciaFLRJ3Kl5VqoRmH8H3BVq8djdivAX943/v1W2cYukTUqeRcUAsu6eWECdePVuvRmHbf14HXZmLxNtXlRmaSKkG08SQbQ5eIOpU7x/VRSzrbJV5NbSaOrDGfNBvxaBY+XvN1/GGOcZxoToJ16sxEfeG195pfduYBhi4RdSphsXc2XbkgyEB1rNUaA9fG2Tjjcey0E3NquQ0YukRErbFtLZbL8sSaxW06ycbQJSLyhHyThSw5qDdaOJste4KhS0TkiegkbFFlh7XTVF8b8B1pRO3Ad6T5H96YkojIh/w9dFleICLyIYYuEZEPMXSJiHyIoUtE5EMMXSIiH+LVC50YL2eiaxEvGaOrRoauJ2Hq6bj24g8B8oWAvWSsoaFBLRF5jwzTlhpRZ+YydD/44APU1NSoNSIi8ganoVtfX4/Kykrs3LkTjY2NqpeIiNrLaeiGhITg3nvv1ZZPnTqlPRIRUfu5LC9069YNU6dORWhoqOohIqL2chm6kgzevn37qjUiImovt6ErT6SVlZWpNSIiai+XoZuRkYG//OUvao2IiLzBaejarl7o3bs3+vfvr3opEMk3JLTUiMh3XL4jTc5077jjDixZsoTvSCOvaE3A800S1FYB+zZg+Y604OBgvg2YiAJKwL4NWAYuERF5l9urF4iIyLsYukREPsTQJSLyIYYuEZEPMXSJiLwpPw2TLRYs2KrWHTB0iYh8iKFLRORDDF0i6lTe3lusllonP20yLBZLUzPUB7YuMK8baftNTsNW2/6xycgW/ekzDMeyLIBtb4YuEXUq0cc+xOS0fLXmoa0LMB8bId+gq7cMJKbPMB8n5yicHTUvV0Rs3GhMT8rS981LRYLoT8ywHUu2DZiuD2foElHnMjgayM7NU2semr4BWUkxakWajtmJTceJHSNjVNFOlE2Gnsf5OJoDJIyJ1TZ5gqFLRJ3Kh8fUQitpJQR7OcCCGelqgxAzOk4mMGQE57+/Cdni16b3WzmbVlyGLm/BTkSB6DYx020tGbgz0hORYS8HWJEhZrp2sWOQgBwcFTmblwukZqRCpK6Y5+ZBry4YZ8nuuQxd3oKdiK4NW/GunNUmzrbXXZuJGQ0x1xXE2Jy5mDl9JuZiE/TJbgJaUV1wHrq8BTsRBSpX5QV7+aDZVQix0Eq2hhNl+sxXrWjkmGxsmr8SOXNnIkb8mjkXSJbrIo5NE10V0OnvOr/awWno8hbsRBSoZo53djNd/YSXczFI2piKhOxkxKp67soxechLNZw8E2O0sm42MHemnrAxInUTREd2whgRyUbTsUFewZA+w1AjbrpkzOWHmEvV1dV48MEH8fLLL6seIiL/FrAfYi7xFuxERN7lNnR5C3YiIu9yGbq8BTsRkfe5vXqBt2AnIvIul1cvyMCVt2APCnJbgSAiolZwmah33303unbtqtaIiMgbXIYub8FOROR9rB0QEfkQQ5eIyIcYukREPsTQJSLyIYYuEZEPMXSJiHyIoUtE5EMMXSIiH2LoEhH5EEOXiMiHGLpERD7kMnR5C3YiIu9zGbq8BTsRkfc5DV3egp2IqGM4DV3egp2IqGO4LC/IOwFPnToVoaGhqoeIiNrLZehKvAU7EZF3uQ1d3oKdiMi7XIYub8FOROR9TkOXt2AnIuoYTkOXt2AnIuoYLhOVt2AnIvI+l6HLW7ATEXkfawdERD7E0CUi8iGLVVDLTi1cuFAtEXW8y1fMn25XU30RERER2nJrPwfEs5PAlSg6VAgMHw4UFqJC9aLbAFw/OgryrMbxU6Xo2ycch3M+17cZjI37CsrOV2DEoD4uv17ZsRIcuhKGSXFh6K76JNlfcF0kJg4CinIuo3tcL3Q/cwEfi7FTo/XzKZ6MoebWr1+vlvxPi6FL5EtFxVfUkq70TC7i4+O15dZ+6p1nJ4IP4+2lb+BT3IQHnpuHsVpfKXal/QbbBjyA5+aNxTvb9yJ65BD07hWmbTWqvFiFYwWn8K3bvuri65Vi9YOHgSem4Bc3q65m5JhSfPP1MZiseprzZAwFApYXiISbHrAFrtQPt995E/DpDuwqBcaMGojisyUIDbY0a7JfbnelaMsJbEMUvukycKV++EWLYerJGAoEDF0i4WyJSFcXxowahK7BQfjiixO4XHUFlkar9ijXZb/c7lwVsj6pQuyc4QxLsmPo0jUuClEDZOiWqHVdaclZ8fsARPUDLBYL7pg0FiMG98WpUyXYf+io9ijXZb/c7lRxGTKLwjA1vnlZgq5dfhG6Z8sv4YE176o1Il8ylxJ0h5G57SwGTJtqLznIYI0dPgB3JozFt++I1x7lusvAFbL+VoC8r4/Ad11XH+ga5Beh29Bg1YKX6KoYOw8/nQZs+81SLF0q2xs4O+2nSLpdTHPbrBT//AiYNrE9x6DOqEOvXsjb9SKulJ/RloOCrAgOakSPiCgMvXWR1mdzuuxLzF/7HnY8/4DqoWuV769e8A753Ixfr2jLHvxwcxhW8eQXOejQma4M3LHTkxE346cYc88iXD9tMWouFqutbbB1gfZyzt4mpyFfbSLyHzyBRq65DN223oI9dcU6vJDyK7yU8jxG3jgANWfeRN3p36Px1Ouo+PR/tQvc5TapNXXc/LTJsMwAMsTEXE7OtbYsF/PTGLvkb8Lw3ZQp+O0snkCj5lyGbltvwd5gtSAEViQ+Ngk9+41H937x6NpvIkKibkHkmKkY/c178WhyAkRqanXcbfuO4/c7DmFYVG91BGe2Ym1yNhJSF2O66tFM34CspBi1QkTk/5yGrvEW7K0N3kUpi3CyMgwhlnqRwLWuW/0FJN17C557Kwu7DxbikVl63c6d7Nw8teRGfhomuyhBbF3gvCTRrN/NMcRGpE0WfQu26rNv+7gF4kcDEZF7TkPXeAt2ecseeeue1jh+Xrysqq9y3yo+xn/F98GudT/AB899D1+73tUF5tJ0zE4UD+kztLBzSdZ8Yzdhbp6tBJGHVCQjVoXmdHmQ7E1435i6ImBXpgOJy5KgzZlbOIadeC7zsVGNyUAi0jHD3XMjIhLcXr1QXV2NzMxMbdZ73333eXw2+OO9RYgL/wJ1F88gbMQ3sHPPZWzavEdtde+13/63WmpOzixjk7P1lcQMWDcYiw1yBhqL3GVWmLvFrFUL0SwkxehjNs3Ns5cl9GPGIcO6QUS758dIFlGcl6WCWhtiPA61VWe5eoHIJRm67lRUVFjffPNN67///W/V07KaL89bC//0fWtVwZ+sRe/Mt166eMn6zpFq63uFDS7bhszT1nnzN6ojuJeRCPmDQrQEa2qe6sxLtcpKsd7fvCVm2IYlWJGQatV3y7OmJsCaYDuIR8fQ9xGhr+1iox0XiVZzL7VW4ZnLprZ37161xWoVk4BWNV/y9dejwOX2kjH50zsrK0tbnjBhgvboiYuHN6OuR3+sfmo16rv0RF3RDgwLs6C6qk6NMDuTfw47/5iNRUl3qB73pm9QL/sTspEca66liixUL/nNzTZzjZk5FwnZyVgrd8p/H5uyEzB3pvlkXEvHIPIu+QliudD/pVFn5zJ0jbdgb01pof5yOcpzMxAa2RuH9x9Cv9jhKNv/BmLDG1Ff29gseE/mleD9jdlY+JMETBw/WPV6IgZJy2ShV4kZjTjxkHPUVHltLiYJcrf0d7eKzN2E7MRlsF8A4ekxqBORH+1oeyda8/b2YTWsA2Rt2I0fb6kSS90xcpjeJ99UMWWD6w/fca0KRz7cg6df362393LxYaXa5MfKDqrn/F4hylTf1aT9/39wdxv/DIT9ufr+9rYHbzm8NcHt1Qu2OwK3plZVuu/3uK5fBPqGN2D+j+5BaFAVQrp3ReOxLWioMwdv4RelePfV/2Dp4wmYFO/uRNpWLLBMhvmS3HykaWfAZqsa6nQsFq/7s5NjYTqfJeuxDie4tBNq6Ssxf1O22N04ffX8GNRZjMW8557Dc47tgZvEtgGIitJHdYTJC8Zi5Gbxj3x5IQrEfOOfy3fjh5uBBd9q7VuHq/Dhe3vw9nEZ4Ep5CTL/uicggtcvFBfixyIkn8UILFA/ANvk5jHY/foUe/v9HGDDUnPwurx6oS2BK1Uez0bvgQNgQRecOnkewSHdEDlsMC4cycD6p3dg3VPbsGbxP/D0o3/Ha2kfY3nSLUiY0NIngkzHBusy5MbaLs+STT8hZjyZFpOUhTwRmukzDOPmAxsd6wLTZyMR2eJXKhY7bPL4GNSJlWLXjk+Bm+5Euz5+oUXyM3LFP86fhKHgoxJgtvyHOrHVH5AjZ7iZ5WJh1Fg89uAUPP3gRMwbL9+YUYWcE4Yg9kN9b5wonq94zt8ejr6qz/dKsXppCaY+J9/QYry3R/sNmzUC08SfQ4EhdF1evSDfkdaWOwIfeGEKRt1yC3r2H4ji4jIMHNgX5wuOoUwE8A0/fFONInLOL65eOPw2lr5xFtN+muRx6Lbt6gX9rhLbhkXp/zBFyyuKat3nNVQW4qW/FqAkYiQeMwWXPvvNxBBMwil8LEI5avxEPHqj4V1yhbl4epcIe8O+ZaJv06clKJEhLkSJIJ97Wz/7cY98uFvMqIG426dgDnLxkthffiim+dhVOHKwELsO6NtstH2G68uyrPDiAcMPhGbPX2p+nKhRI8XzsY1T32N5FObdG4bDuwuQoz3vMEy9dyJuc/d+K5eq8NbyPdgweCx2L/DCT1w5g15agJGGO4e4rOm29RbsQ+94El98uAufvPU6Tu7eoj0WHcrBgK8b6q9EfkvNcgeMQ1wHf0BY1obDKJgzEbtThmOkCIoHU+TL0So81Yp6YtkJPZDibuqLXHtNVzx+eBn9tFvLhWLCTXqNpOREmalueqRQj7K4m1TgyiCUIaoCVyo5fhgvfujs+ZRiswpcqeTAHmwu1JflzPtth8BtC2fHKTlegBeb1X9L8Lb4waMHrlSFzN3+USPWPt5z2Eg8YLhziNurF9qi79gZ+NriTzBp6af2Fp+0CxGxU9QIIj9WmoNDZ2Vl4Xbx4r9jTV5g+3yGyygo0vuGzRIh3IoZVmmlnC1GIaoiF5n2mq6xtluF0uH9tBPEss6ba6/xluKwmLHKfcdqs89S7NZmnmKWeLt6yX/vWH2/4yea1YZLPj2BHDELluPmjVJ9FXJ/8fVss2Qx+9WOo5ptlivZywq3uyiaixn8Lu35GZ/PSPV9FEBkqgM529XHaEc0fa8+ZjiZ9tRHYVjwk+Ewlom9HrpEgexw5jacHTANU5tumOYDbb3/mQq4CBHcKnznqdCJ6q1qk2JbP/FrimONt7AUOeIhavxw3CDXKy+rGaWYJe5SM+a/HtbGyL4S+22SdXI2PPVG/YfDDbfpoaqXF8IwxjazFrNfeZyX5JUUhYYfBJ4QAa49n1EjcNtwVbboPRxjTQFvI8sJY3CDLCeI79tFjPuO8WTac1HIXGq7SkUC/j8/gOPcgY35qQAAAABJRU5ErkJggg==" alt="" />

实验2：结对编程练习

利用班级名单文件、文本框和按钮组件，设计一个有如下界面（图1）的点名器，要求用户点击开始按钮后在文本输入框随机显示2018级计算机科学与技术（1）班同学姓名，如图2所示，点击停止按钮后，文本输入框不再变换同学姓名，此同学则是被点到的同学姓名，如图3所示。

图1 点名器启动界面

图2 点名器随机显示姓名界面

 

图3 点名器点名界面

 

package chart13;
import java.util.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.Frame;
import java.io.File;
import java.io.FileNotFoundException;

public class ButtonFrame extends JFrame implements ActionListener{
    private static final long serialVersionUID = 1L;
    //serialVersionUID适用于Java的序列化机制，简单来说，Java的序列化机制是通过判断类的

    private JButton but ;
    private JButton show;
    private static boolean flag = true;
    public static void main(String arguments []) {
         new ButtonFrame();

        }

public  ButtonFrame(){

but = new JButton("START");//创建一个“开始”按钮
but.setBounds(,,,);
show = new JButton("随机点名");//创建一个“随机点名”按钮
show.setBounds(,,,);
add(but);//将按钮添加到面板中
add(show);
setLayout(null);
setVisible(true);//面板的可视化处理
setResizable(false);
setBounds(,,,);
this.getContentPane().setBackground(Color.black);//面板背景色为白色
setTitle("随机点名");//设置框架标题
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//关闭该面板
but.addActionListener(this);
}

    public void actionPerformed(ActionEvent e){
        int i=;
        String names[]=new String[];//创建一个数组，大小为50
        try {
            Scanner in=new Scanner(new File("D:\\2019studentlist.txt"));//将文件写入程序
            while(in.hasNextLine())
            {
                names[i]=in.nextLine();//读取文件，遍历全班姓名
                i++;
            }
        } catch (FileNotFoundException e1) {

            e1.printStackTrace();//异常处理
        }

     //点击开始后的操作
        if(but.getText()=="START"){    

    show.setBackground(Color.GREEN);
    flag=true;
    new Thread(){
        public void run(){
            while(ButtonFrame.flag){
            Random r = new Random(); //随机点名
            int i= r.nextInt();
            show.setText(names[i]);
            }
        }
    }.start();
    but.setText("STOP");
    but.setBackground(Color.BLUE);
}
else if(but.getText()=="STOP"){
    flag = false;
    but.setText("START");
    but.setBackground(Color.WHITE);
    show.setBackground(Color.magenta);
}
    }

}

运行结果：

第三部分：实验总结

       本章主要学习了事件处理的基本原理，理解其用途；掌握AWT事件模型的工作机制； 掌握事件处理的基本编程模型；了解GUI界面组件观感设置方法； 掌握WindowAdapter类、AbstractAction类的用法； 掌握GUI程序中鼠标事件处理技术。由于自己的基础等各方面的原因，以及前面知识与后面知识的衔接等原因，这一章的学习对于我来说还是相比较上一章来说有较大的困难的。而且此次的作业也借鉴了其他同学的，而且最后的编程题是和陈园园、曹玉中结对完成的。所以在完成作业的过程中也学习到了很多，从结对小伙伴的身上。这也是关于本章学习收获较大的一点。