王之泰201771010131《面向对象程序设计（java）》第十二周学习总结(代码片段)

 1 import javax.swing.*;
 2 public class SimpleFrameTest
 3 
 4    public static void main(String[] args)
 5    
 6      JFrame  frame = new JFrame(); 
 7      frame.setBounds(0, 0,300, 200);
 8      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 9      frame.setVisible(true);    
10    
11 

 1 package simpleFrame;
 2 
 3 import java.awt.*;
 4 import javax.swing.*;
 5 
 6 /**
 7  * @version 1.33 2015-05-12
 8  * @author Cay Horstmann
 9  */
10 public class SimpleFrameTest
11 
12    public static void main(String[] args)
13    
14       EventQueue.invokeLater(() ->
15          
16             SimpleFrame frame = new SimpleFrame();
17             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
18             frame.setVisible(true);
19          );
20    
21 
22 
23 class SimpleFrame extends JFrame
24 
25    private static final int DEFAULT_WIDTH = 300;
26    private static final int DEFAULT_HEIGHT = 200;
27 
28    public SimpleFrame()
29    
30       setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
31    
32 

 1 package sizedFrame;
 2 
 3 import java.awt.*;
 4 import javax.swing.*;
 5 
 6 /**
 7  * @version 1.34 2015-06-16
 8  * @author Cay Horstmann
 9  */
10 public class SizedFrameTest
11 
12    public static void main(String[] args)
13    
14       EventQueue.invokeLater(() ->
15          
16             JFrame frame = new SizedFrame();
17             frame.setTitle("SizedFrame");
18             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
19             frame.setVisible(true);
20          );
21    
22 
23 
24 class SizedFrame extends JFrame
25 
26    public SizedFrame()
27    
28       // 获取屏幕尺寸
29 
30       Toolkit kit = Toolkit.getDefaultToolkit();
31       Dimension screenSize = kit.getScreenSize();
32       int screenHeight = screenSize.height;
33       int screenWidth = screenSize.width;
34 
35       // 设置框架宽度、高度并让平台选择屏幕位置
36 
37       setSize(screenWidth / 2, screenHeight / 2);
38       setLocationByPlatform(true);
39 
40       // 设置帧图标
41 
42       Image img = new ImageIcon("icon.gif").getImage();
43       setIconImage(img);      
44    
45 

 1 package notHelloWorld;
 2 
 3 import javax.swing.*;
 4 import java.awt.*;
 5 
 6 /**
 7  * @version 1.33 2015-05-12
 8  * @author Cay Horstmann
 9  */
10 public class NotHelloWorld
11 
12    public static void main(String[] args)
13    
14       EventQueue.invokeLater(() ->
15          
16             JFrame frame = new NotHelloWorldFrame();
17             frame.setTitle("NotHelloWorld");
18             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
19             frame.setVisible(true);
20          );
21    
22 
23 
24 /**
25  * A frame that contains a message panel
26  */
27 class NotHelloWorldFrame extends JFrame
28 
29    public NotHelloWorldFrame()
30    
31       add(new NotHelloWorldComponent());
32       pack();
33    
34 
35 
36 /**
37  * A component that displays a message.
38  */
39 class NotHelloWorldComponent extends JComponent
40 
41    public static final int MESSAGE_X = 75;
42    public static final int MESSAGE_Y = 100;
43 
44    private static final int DEFAULT_WIDTH = 300;
45    private static final int DEFAULT_HEIGHT = 200;
46 
47    public void paintComponent(Graphics g)
48    
49       g.drawString("Not a Hello, World program", MESSAGE_X, MESSAGE_Y);
50    
51    
52    public Dimension getPreferredSize()  return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT); 
53 

 1 package draw;
 2 
 3 import java.awt.*;
 4 import java.awt.geom.*;
 5 import javax.swing.*;
 6 
 7 /**
 8  * @version 1.33 2007-05-12
 9  * @author Cay Horstmann
10  */
11 public class DrawTest
12 
13    public static void main(String[] args)
14    
15       EventQueue.invokeLater(() ->
16          
17             JFrame frame = new DrawFrame();
18             frame.setTitle("DrawTest");
19             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
20             frame.setVisible(true);
21          );
22    
23 
24 
25 /**
26  * A frame that contains a panel with drawings
27  */
28 class DrawFrame extends JFrame
29 
30    public DrawFrame()
31          
32       add(new DrawComponent());
33       pack();
34    
35 
36 
37 /**
38  * A component that displays rectangles and ellipses.
39  */
40 class DrawComponent extends JComponent
41 
42    private static final int DEFAULT_WIDTH = 400;
43    private static final int DEFAULT_HEIGHT = 400;
44 
45    public void paintComponent(Graphics g)
46    
47       Graphics2D g2 = (Graphics2D) g;
48 
49       // 绘制矩形
50 
51       double leftX = 100;
52       double topY = 100;
53       double width = 200;
54       double height = 150;
55 
56       Rectangle2D rect = new Rectangle2D.Double(leftX, topY, width, height);
57       g2.draw(rect);
58 
59       // 画封闭椭圆
60 
61       Ellipse2D ellipse = new Ellipse2D.Double();
62       ellipse.setFrame(rect);
63       g2.draw(ellipse);
64 
65       // 画一条对角线
66 
67       g2.draw(new Line2D.Double(leftX, topY, leftX + width, topY + height));
68 
69       // 用同一个中心画一个圆
70 
71       double centerX = rect.getCenterX();
72       double centerY = rect.getCenterY();
73       double radius = 150;
74 
75       Ellipse2D circle = new Ellipse2D.Double();
76       circle.setFrameFromCenter(centerX, centerY, centerX + radius, centerY + radius);
77       g2.draw(circle);
78    
79    
80    public Dimension getPreferredSize()  return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT); 
81 

 1 package font;
 2 
 3 import java.awt.*;
 4 import java.awt.font.*;
 5 import java.awt.geom.*;
 6 import javax.swing.*;
 7 
 8 /**
 9  * @version 1.34 2015-05-12
10  * @author Cay Horstmann
11  */
12 public class FontTest
13 
14    public static void main(String[] args)
15    
16       EventQueue.invokeLater(() ->
17          
18             JFrame frame = new FontFrame();
19             frame.setTitle("FontTest");
20             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
21             frame.setVisible(true);
22          );
23    
24 
25 
26 /**
27  * A frame with a text message component
28  */
29 class FontFrame extends JFrame
30 
31    public FontFrame()
32          
33       add(new FontComponent());
34       pack();
35    
36 
37 
38 /**
39  * A component that shows a centered message in a box.
40  */
41 class FontComponent extends JComponent
42 
43    private static final int DEFAULT_WIDTH = 300;
44    private static final int DEFAULT_HEIGHT = 200;
45 
46    public void paintComponent(Graphics g)
47    
48       Graphics2D g2 = (Graphics2D) g;
49 
50       String message = "Hello, World!";
51 
52       Font f = new Font("Serif", Font.BOLD, 36);
53       g2.setFont(f);
54 
55       // 测量消息的大小
56 
57       FontRenderContext context = g2.getFontRenderContext();
58       Rectangle2D bounds = f.getStringBounds(message, context);
59 
60       // 设置（x，y）=文本左上角
61 
62       double x = (getWidth() - bounds.getWidth()) / 2;
63       double y = (getHeight() - bounds.getHeight()) / 2;
64 
65       // 增加到Y到达基线
66 
67       double ascent = -bounds.getY();
68       double baseY = y + ascent;
69 
70       // 汲取信息
71 
72       g2.drawString(message, (int) x, (int) baseY);
73 
74       g2.setPaint(Color.LIGHT_GRAY);
75 
76       // 绘制基线
77 
78       g2.draw(new Line2D.Double(x, baseY, x + bounds.getWidth(), baseY));
79 
80       // 绘制封闭矩形
81 
82       Rectangle2D rect = new Rectangle2D.Double(x, y, bounds.getWidth(), bounds.getHeight());
83       g2.draw(rect);
84    
85    
86    public Dimension getPreferredSize()  return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT); 
87 

 1 package image;
 2 
 3 import java.awt.*;
 4 import javax.swing.*;
 5 
 6 /**
 7  * @version 1.34 2015-05-12
 8  * @author Cay Horstmann
 9  */
10 public class ImageTest
11 
12    public static void main(String[] args)
13    
14       EventQueue.invokeLater(() ->
15          
16             JFrame frame = new ImageFrame();
17             frame.setTitle("ImageTest");
18             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
19             frame.setVisible(true);
20          );
21    
22 
23 
24 /**
25  * A frame with an image component
26  */
27 class ImageFrame extends JFrame
28 
29    public ImageFrame()
30    
31       add(new ImageComponent());
32       pack();
33    
34 
35 
36 /**
37  * A component that displays a tiled image
38  */
39 class ImageComponent extends JComponent
40 
41    private static final int DEFAULT_WIDTH = 300;
42    private static final int DEFAULT_HEIGHT = 200;
43 
44    private Image image;
45 
46    public ImageComponent()
47    
48       image = new ImageIcon("blue-ball.gif").getImage();
49    
50 
51    public void paintComponent(Graphics g)
52    
53       if (image == null) return;
54 
55       int imageWidth = image.getWidth(null);
56       int imageHeight = image.getHeight(null);
57 
58       // 在左上角绘制图像
59 
60       g.drawImage(image, 0, 0, null);
61       // 在组件上平铺图像
62 
63       for (int i = 0; i * imageWidth <= getWidth(); i++)
64          for (int j = 0; j * imageHeight <= getHeight(); j++)
65             if (i + j > 0) 
66                g.copyArea(0, 0, imageWidth, imageHeight, i * imageWidth, j * imageHeight);
67    
68    
69    public Dimension getPreferredSize()  return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT); 
70 

 1 package image;
 2 
 3 import java.awt.*;
 4 import java.awt.event.WindowAdapter;
 5 import java.awt.event.WindowEvent;
 6 
 7 import javax.swing.*;
 8 
 9 /**
10  * @version 1.34 2015-05-12
11  * @author Cay Horstmann
12  */
13 public class ImageTest
14 
15    @SuppressWarnings("null")
16 public static void main(String[] args)
17    
18       EventQueue.invokeLater(() ->
19          
20             JFrame frame = new ImageFrame();
21             frame.setTitle("ImageTest");
22             frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
23             frame.setVisible(true);
24          );
25       
26    
27    
28 
29 
30 /**
31  * A frame with an image component
32  */
33 class ImageFrame extends JFrame
34 
35    public ImageFrame()
36    
37       add(new ImageComponent());
38       pack();
39    
40 
41 
42 /**
43  * A component that displays a tiled image
44  */
45 class ImageComponent extends JComponent
46 
47    private static final int DEFAULT_WIDTH = 300;
48    private static final int DEFAULT_HEIGHT = 200;
49 
50    private Image image;
51 
52    public ImageComponent()
53    
54       image = new ImageIcon("timg.jpg").getImage();
55    
56 
57    public void paintComponent(Graphics g)
58    
59       if (image == null) return;
60 
61       int imageWidth = image.getWidth(null);
62       int imageHeight = image.getHeight(null);
63 
64       // 在左上角绘制图像
65 
66       g.drawImage(image, 0, 0, null);
67       // 在组件上平铺图像
68 
69       for (int i = 0; i * imageWidth <= getWidth(); i++)
70          for (int j = 0; j * imageHeight <= getHeight(); j++)
71             if (i + j > 0) 
72                g.copyArea(0, 0, imageWidth, imageHeight, i * imageWidth, j * imageHeight);
73    
74    
75    public Dimension getPreferredSize()  
76        return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT); 
77        
78