201771010118 马昕璐 《面向对象程序设计（java）》第十三周学习总结

package button;

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

/**
 * @version 1.34 2015-06-12
 * @author Cay Horstmann
 */
public class ButtonTest
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(() -> {
         JFrame frame = new ButtonFrame();
         frame.setTitle("ButtonTest");
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setVisible(true);
      });
   }
}

package button;

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

/**
 * A frame with a button panel
 */
public class ButtonFrame extends JFrame
{
   private JPanel buttonPanel;//button内容
   private static final int DEFAULT_WIDTH = 300;
   private static final int DEFAULT_HEIGHT = 200;//定义像素值，控制窗口大小

   public ButtonFrame()//构造器
   {      
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);//继承set类方法，决定框架长和宽

      // create buttons
      JButton yellowButton = new JButton("Yellow");
      JButton blueButton = new JButton("Blue");
      JButton redButton = new JButton("Red");

      buttonPanel = new JPanel();

      // add buttons to panel  用add方法添加三个按钮组件，只有容器方法用add方法
      buttonPanel.add(yellowButton);
      buttonPanel.add(blueButton);
      buttonPanel.add(redButton);

      // add panel to frame
      add(buttonPanel);

      // create button actions   生成三个监听器类对象，同一个自定义类 ColorAction
      ColorAction yellowAction = new ColorAction(Color.YELLOW);
      ColorAction blueAction = new ColorAction(Color.BLUE);
      ColorAction redAction = new ColorAction(Color.RED);

      // associate actions with buttons  
      yellowButton.addActionListener(yellowAction);
      blueButton.addActionListener(blueAction);
      redButton.addActionListener(redAction);
   }

   /**
    * An action listener that sets the panel‘s background color.
    */
   private class ColorAction implements ActionListener//定义一个私有类ColorAction继承ActionListener（监听器类）
   {
      private Color backgroundColor;

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

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

package button3lambda表达式;


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

/**
 * A frame with a button panel
 */
public class ButtonFrame extends JFrame {
    private JPanel buttonPanel;
    private static final int DEFAULT_WIDTH = 300;
    private static final int DEFAULT_HEIGHT = 200;

    public ButtonFrame() {
        setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
        buttonPanel = new JPanel();
        makeButton("黄色", Color.yellow);
        makeButton("蓝色", Color.blue);
        makeButton("红色", Color.red);
        add(buttonPanel);

    }

    protected void makeButton(String name,Color backgound) {
        // create buttons
        JButton button = new JButton(name);
        // add buttons to panel
        buttonPanel.add(button);
        // create button actions
        button.addActionListener((e)->{
            buttonPanel.setBackground(backgound);
        });
}

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

package plaf;

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

/**
 * A frame with a button panel for changing look-and-feel
 */
public class PlafFrame extends JFrame
{
   private JPanel buttonPanel;//button面板内容

   public PlafFrame()
   {
      buttonPanel = new JPanel();

      UIManager.LookAndFeelInfo[] infos = UIManager.getInstalledLookAndFeels();//调用静态的UIManager.setLookAndFeel方法，提供所想要的观感类名
      for (UIManager.LookAndFeelInfo info : infos)
         makeButton(info.getName(), info.getClassName());//返回观感的显示名称和观感实现类的名称

      add(buttonPanel);//将指定组件追加到此容器的尾部
      pack();//调整窗口大小
   }

   /**
    * Makes a button to change the pluggable look-and-feel.
    * @param name the button name
    * @param className the name of the look-and-feel class
    */
   private void makeButton(String name, String className)
   {
      // add button to panel

      JButton button = new JButton(name);//button调用makeButton方法
      buttonPanel.add(button);//用add方法添加按钮组件

      // set button action

      button.addActionListener(event -> {
         // button action: switch to the new look-and-feel
         try
         {
            UIManager.setLookAndFeel(className);
            SwingUtilities.updateComponentTreeUI(this);//this指示外围对象
            pack();
         }
         catch (Exception e)
         {
            e.printStackTrace();
         }
      });
   }
}

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(() -> {
         JFrame frame = new ActionFrame();
         frame.setTitle("ActionTest");
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setVisible(true);
      });
   }
}

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 = 300;
   private static final int DEFAULT_HEIGHT = 200;

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

      buttonPanel = new JPanel();

      // define actions
      //创建自己定义的ColorAction对象
      Action yellowAction = new ColorAction("Yellow", new ImageIcon("yellow-ball.gif"),
            Color.YELLOW);
      Action blueAction = new ColorAction("Blue", new ImageIcon("blue-ball.gif"), Color.BLUE);
      Action redAction = new ColorAction("Red", new ImageIcon("red-ball.gif"), Color.RED);

      // add buttons for these actions
      //创建一个按钮，其属性从所提供的Action中获取
      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 imap = buttonPanel.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
      //当该组件包含了拥有键盘焦点的组件时
      //将动作与击键关联起来，调用KeyStroke类的静态getKeyStroke方法
      imap.put(KeyStroke.getKeyStroke("ctrl Y"), "panel.yellow");
      imap.put(KeyStroke.getKeyStroke("ctrl B"), "panel.blue");
      imap.put(KeyStroke.getKeyStroke("ctrl R"), "panel.red");

      // associate the names with actions
      //键与动作关联
      ActionMap amap = buttonPanel.getActionMap();//返回关联动作映射键和动作对象的映射
      amap.put("panel.yellow", yellowAction);
      amap.put("panel.blue", blueAction);
      amap.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)
      {//将于名字关联的对象放置在动作对象内
         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)//执行改变颜色的动作
      {
         Color c = (Color) getValue("color");//返回键存储的对象的值
         buttonPanel.setBackground(c);
      }
   }
}

package mouse;

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

/**
 * @version 1.34 2015-06-12
 * @author Cay Horstmann
 */
public class MouseTest
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(() -> {
         JFrame frame = new MouseFrame();
         frame.setTitle("MouseTest");
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setVisible(true);
      });
   }
}

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();
   }
}

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 = 300;
   private static final int DEFAULT_HEIGHT = 200;

   private static final int SIDELENGTH = 10;//鼠标点击形成的方框边长
   private ArrayList<Rectangle2D> squares;
   private Rectangle2D current; // the square containing the mouse cursor

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

      addMouseListener(new MouseHandler());
      addMouseMotionListener(new MouseMotionHandler());
   }

   public Dimension getPreferredSize() { return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT); }   
   
   public void paintComponent(Graphics g)
   {
      Graphics2D g2 = (Graphics2D) g;

      // 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();

      current = new Rectangle2D.Double(x - SIDELENGTH / 2, y - SIDELENGTH / 2, SIDELENGTH,
            SIDELENGTH);
      squares.add(current);
      repaint();
   }

   /**
    * Removes a square from the collection.
    * @param s the square to remove
    */
   public void remove(Rectangle2D s)
   {
      if (s == null) return;
      if (s == current) current = null;
      squares.remove(s);
      repaint();
   }

   //当鼠标被按下时调用三个监听器方法
   private class MouseHandler extends MouseAdapter
   {
      public void mousePressed(MouseEvent event)//鼠标第一次被按下时调用mousePressed
      {
         // add a new square if the cursor isn‘t inside a square
          //当鼠标点击在所有小方块的像素之外是，就会绘制一个新的小方块
         current = find(event.getPoint());
         if (current == null) add(event.getPoint());
      }

      public void mouseClicked(MouseEvent event)//用mouseEvent类对象作为参数，调用get和getY方法可以获得鼠标键按下时鼠标指针所在的x和y坐标
      {
         // remove the current square if double clicked
          //如果用户在某个小方块中双击鼠标，就会将它擦除
         current = find(event.getPoint());
         if (current != null && event.getClickCount() >= 2) 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));//光标位于一个小方块之上时变成另一种形状
      }

      public void mouseDragged(MouseEvent event)
      {
         if (current != null)
         {
            int x = event.getX();
            int y = event.getY();

            // drag the current rectangle to center it at (x, y)
            //获得xy绘图
            current.setFrame(x - SIDELENGTH / 2, y - SIDELENGTH / 2, SIDELENGTH, SIDELENGTH);
            repaint();//重新绘制
         }
      }
   }   
}

package 点名器;

    import java.util.*;
    import java.awt.*;
    import javax.swing.*;
    import java.awt.event.*;
    import java.io.*;
    import javax.swing.event.*;
    
    public class NameFrame extends JFrame implements ActionListener{
        private JLabel jla;
        private JLabel jlb;//定义两个短文本字符串或图像或二者的显示区
        private JButton jba;//定义一个按钮
        private static boolean flag = true;
        public NameFrame(){
            this.setLayout(null);
          
            jla = new JLabel("姓名");
            jlb = new JLabel("准备中");//创建具有指定文本的 JLabel 实例
            jba = new JButton("开始");//创建一个带文本的按钮。
            this.add(jla);
            this.add(jlb);//将指定组件追加到此容器的尾部
            jla.setFont(new Font("Courier",Font.PLAIN,22));//设置jla组件字体
            jla.setHorizontalAlignment(JLabel.CENTER);
             jla.setVerticalAlignment(JLabel.CENTER);  //设置标签内容对齐方式
             jla.setBounds(20,100,180,30);//移动组件并调整其大小
             jlb.setOpaque(true);//绘制其边界内的所有像素
             jlb.setBackground(Color.ORANGE);//设置组件的背景色
             jlb.setFont(new Font("Courier",Font.PLAIN,22));
            jlb.setHorizontalAlignment(JLabel.CENTER);
             jlb.setVerticalAlignment(JLabel.CENTER);        
             jlb.setBounds(150,100,120,30);
              
             this.add(jba);
             jba.setBounds(150,150,80,26);
          
             jba.addActionListener(this);//添加一个监听器到按钮中。

             this.setTitle("点名器");
            this.setBounds(400,400,400,300);
            this.setVisible(true);
            this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        }
        public void actionPerformed(ActionEvent e)//操作时调用的方法
        {
            int i=0;
            String names[]=new String[50];
            try {
                Scanner in=new Scanner(new File("F:\\studentnamelist.txt"));
                while(in.hasNextLine())
                {
                    names[i]=in.nextLine();
                    i++;
                }
            } catch (FileNotFoundException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
            if(jba.getText()=="开始")//开始按钮的内容
            {
                jlb.setBackground(Color.PINK);
                flag = true;
                new Thread(){   
                    public void run(){
                        while(NameFrame.flag){
                        Random r = new Random(); 
                        int i= r.nextInt(47);
                        jlb.setText(names[i]);
                        }
                    }
                }.start();
                jba.setText("停止");
                jba.setBackground(Color.blue);
            }    
            else if(jba.getText()=="停止")//关于停止按钮的设置
            {
                flag = false;
                jba.setText("开始");
                jba.setBackground(Color.WHITE);
                jlb.setBackground(Color.gray);
            }
         }
        public static void main(String arguments []){ 
            new NameFrame();
        }
    }

package 点名器;

    import java.util.*;
    import java.awt.*;
    import javax.swing.*;
    import java.awt.event.*;
    import java.io.*;
    import javax.swing.event.*;
    
    public class NameFrame extends JFrame implements ActionListener{
        private JLabel jla;
        private JLabel jlb;//定义两个短文本字符串或图像或二者的显示区
        private JButton jba;//定义一个按钮
        private static boolean flag = true;
        public NameFrame(){
            this.setLayout(null);
          
            jla = new JLabel("姓名");
            jlb = new JLabel("准备中");//创建具有指定文本的 JLabel 实例
            jba = new JButton("开始");//创建一个带文本的按钮。
            this.add(jla);
            this.add(jlb);//将指定组件追加到此容器的尾部
            jla.setFont(new Font("Courier",Font.PLAIN,22));//设置jla组件字体
            jla.setHorizontalAlignment(JLabel.CENTER);
             jla.setVerticalAlignment(JLabel.CENTER);  //设置标签内容对齐方式
             jla.setBounds(20,100,180,30);//移动组件并调整其大小
             jlb.setOpaque(true);//绘制其边界内的所有像素
             jlb.setBackground(Color.ORANGE);//设置组件的背景色
             jlb.setFont(new Font("Courier",Font.PLAIN,22));
            jlb.setHorizontalAlignment(JLabel.CENTER);
             jlb.setVerticalAlignment(JLabel.CENTER);        
             jlb.setBounds(150,100,120,30);
              
             this.add(jba);
             jba.setBounds(150,150,80,26);
          
             jba.addActionListener(this);//添加一个监听器到按钮中。

             this.setTitle("点名器");
            this.setBounds(400,400,400,300);
            this.setVisible(true);
            this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        }
        public void actionPerformed(ActionEvent e)//操作时调用的方法
        {
            int i=0;
            String names[]=new String[50];
            try {
                Scanner in=new Scanner(new File("F:\\studentnamelist.txt"));
                while(in.hasNextLine())
                {
                    names[i]=in.nextLine();
                    i++;
                }
            } catch (FileNotFoundException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
            if(jba.getText()=="开始")//开始按钮的内容
            {
                jlb.setBackground(Color.PINK);
                flag = true;
                new Thread(){   
                    public void run(){
                        while(NameFrame.flag){
                        Random r = new Random(); 
                        int i= r.nextInt(47);
                        jlb.setText(names[i]);
                        }
                    }
                }.start();
                jba.setText("停止");
                jba.setBackground(Color.blue);
            }    
            else if(jba.getText()=="停止")//关于停止按钮的设置
            {
                flag = false;
                jba.setText("开始");
                jba.setBackground(Color.WHITE);
                jlb.setBackground(Color.gray);
            }
         }
        public static void main(String arguments []){ 
            new NameFrame();
        }
    }