Java2实用教程（第二版）程序代码——第二十二章 Java 与图像
1
//例子1
2import java.applet.*;
3import java.awt.*;
4public class Example22_1 extends Applet
5
{ Image img;
6
public void start()
7
{ img=getImage(getCodeBase(),"vintdev.jpg");
8
}
9 public void paint(Graphics g)
10 { g.drawImage(img,2,2,this);
11 }
12
}
13
14//例子2
15import java.applet.*;import java.awt.*;
16public class Example22_2 extends Applet
17{ Image img;int height,width;
18 public void start()
19 { img=getImage(getCodeBase(),"vintdev.jpg");
20 height=img.getHeight(this);width=img.getWidth(this);
21 }
22 public void paint(Graphics g)
23 { g.drawImage(img,22,72,width,height,this);
24 g.drawImage(img,2+width,2+height,width,height,this);
25 }
26}
27
28//例子3
29import java.applet.*;import java.awt.*;
30public class Wuqiong extends Applet
31{ static Image img; Canvas canvas; static int width,height;
32 public void init()
33 { setLayout(new GridLayout(3,1));add(new Button("祝好"));
34 add(new Button("进步"));
35 canvas=new Mycanvas(); add(canvas);
36 width=getSize().width;height=getSize().height;
37 }
38 public void start()
39 { img=getImage(getCodeBase(),"Tom1.jpg");
40 }
41}
42class Mycanvas extends Canvas
43{ public void paint(Graphics g)
44 { g.drawImage(Wuqiong.img,0,0,Wuqiong.width,(Wuqiong.height)/3,this);
45 }
46}
47
48//例子4
49import java.applet.*;import java.awt.*;import java.awt.event.*;
50public class Example22_4 extends Applet implements MouseListener
51{ final int number=38; int count=0;
52 Image[] card=new Image[number];
53 public void init()
54 { addMouseListener(this);
55 for(int i=0;i<number;i++)
56 { card[i]=getImage(getCodeBase(),"jiafei"+i+".jpg");
57 }
58 }
59 public void paint(Graphics g)
60 { if((card[count])!=null)
61 g.drawImage(card[count],10,10,
62 card[count].getWidth(this),card[count].getHeight(this),this);
63 }
64 public void mousePressed(MouseEvent e)
65 { count++;
66 if(count>number)
67 count=0;
68 repaint();
69 }
70 public void mouseReleased(MouseEvent e){}
71 public void mouseEntered(MouseEvent e){}
72 public void mouseExited(MouseEvent e){}
73 public void mouseClicked(MouseEvent e){}
74}
75
76//例子5
77import java.applet.*;import java.awt.*;import java.awt.event.*;
78public class Example22_5 extends Applet implements Runnable
79{ final int number=59; int count=0;
80 Thread mythread;
81 Image[] pic=new Image[number];
82 public void init()
83 { for(int i=0;i<number;i++)
84 { pic[i]=getImage(getCodeBase(),"tom"+i+".jpg");
85 }
86 }
87 public void start()
88 { mythread=new Thread(this);
89 mythread.start();
90 }
91 public void stop()
92 { mythread=null;
93 }
94 public void run()
95 { while(true)
96 { if(count>59)
97 count=0;
98 repaint();
99 count++;
100 try{ mythread.sleep(200);
101 }
102 catch(InterruptedException e){}
103 }
104 }
105 public void paint(Graphics g)
106 { if((pic[count])!=null)
107 g.drawImage(pic[count],10,10,
108 pic[count].getWidth(this),pic[count].getHeight(this),this);
109 }
110}
111
112//例子6
113import java.applet.*;import java.awt.*;
114import java.awt.event.*;
115class Imagecanvas extends Canvas
116{ Toolkit tool; Image myimage;
117 Imagecanvas()
118 { setSize(200,200);
119 tool=getToolkit();//得到一个Toolkit对象。
120 myimage=tool.getImage("apple.jpg");//由tool负责获取图像。
121 }
122 public void paint(Graphics g)
123 {
124 g.drawImage(myimage,10,10,myimage.getWidth(this),myimage.getHeight(this),this);
125 }
126}
127public class Example22_6
128{ public static void main(String args[])
129 {Imagecanvas canvas=new Imagecanvas();
130 Frame frame=new Frame();
131 frame.setLayout(new BorderLayout());
132 frame.add(canvas,"Center"); frame.add("South",new Label());
133 frame.add("West",new Label()); frame.add("North",new Label());
134 frame.setSize(400,300);frame.setVisible(true);
135 frame.pack();
136 frame.addWindowListener(new WindowAdapter()
137 {public void windowClosing(WindowEvent e)
138 {System.exit(0);}
139 });
140 }
141}
142
143//例子7
144import java.applet.*;import java.awt.*;
145import java.awt.event.*;
146class Imagecanvas extends Canvas implements MouseListener
147{final int number=59; int count=0; Toolkit tool;
148 Image[] card=new Image[number];
149 Imagecanvas()
150 { getSize(); tool=getToolkit(); addMouseListener(this);
151 for(int i=0;i<number;i++)
152 {card[i]=tool.getImage("tom"+i+".jpg");
153 }
154 }
155 public void paint(Graphics g)
156{if((card[count])!=null)
157 g.drawImage(card[count],10,10,
158 card[count].getWidth(this),card[count].getHeight(this),this);
159 }
160 public Dimension getPreferredSize()
161 {return new Dimension(160,100);
162 }
163 public void mousePressed(MouseEvent e)
164 { count++;
165 if(count>number-1)
166 count=0;
167 repaint();
168 }
169 public void mouseReleased(MouseEvent e){}
170 public void mouseEntered(MouseEvent e){}
171 public void mouseExited(MouseEvent e){}
172 public void mouseClicked(MouseEvent e){}
173}
174public class Example226
175{ public static void main(String args[])
176 {Imagecanvas canvas=new Imagecanvas();
177 Frame frame=new Frame(); frame.setLayout(new BorderLayout());
178 frame.add(canvas,"Center");
179 frame.add("South",new Label());frame.add("West",new Label());
180 frame.add("North",new Label());
181 frame.setSize(400,300);frame.setVisible(true); frame.pack();
182 frame.addWindowListener(new WindowAdapter()
183 {public void windowClosing(WindowEvent e)
184 {System.exit(0);}
185 });
186 }
187}
188
189//例子8
190import java.awt.*;import java.awt.event.*;
191public class Frame_Icon
192{ public static void main(String args[])
193 { Frame frame=new Frame();
194 Toolkit tool= frame.getToolkit();//得到一个Toolkit对象。
195 Image myimage=tool.getImage("apple.jpg");//由tool负责获取图像。
196 //设置窗口的图标是myimage指定的图象apple.jpg：
197 frame.setIconImage(myimage);
198 frame.setSize(400,300);frame.setVisible(true);
199 frame.addWindowListener(new WindowAdapter()
200 {public void windowClosing(WindowEvent e)
201 { System.exit(0);
202 }
203 });
204 }
205}
206
//例子12
import java.applet.*;3
import java.awt.*;4
public class Example22_1 extends Applet5
{ Image img;
6
public void start()7
{ img=getImage(getCodeBase(),"vintdev.jpg");
8
}9
public void paint(Graphics g)10
{ g.drawImage(img,2,2,this);11
} 12
}13
14
//例子215
import java.applet.*;import java.awt.*;16
public class Example22_2 extends Applet17
{ Image img;int height,width;18
public void start()19
{ img=getImage(getCodeBase(),"vintdev.jpg");20
height=img.getHeight(this);width=img.getWidth(this);21
}22
public void paint(Graphics g)23
{ g.drawImage(img,22,72,width,height,this);24
g.drawImage(img,2+width,2+height,width,height,this);25
} 26
}27
28
//例子329
import java.applet.*;import java.awt.*;30
public class Wuqiong extends Applet31
{ static Image img; Canvas canvas; static int width,height;32
public void init()33
{ setLayout(new GridLayout(3,1));add(new Button("祝好"));34
add(new Button("进步")); 35
canvas=new Mycanvas(); add(canvas);36
width=getSize().width;height=getSize().height; 37
}38
public void start()39
{ img=getImage(getCodeBase(),"Tom1.jpg");40
}41
}42
class Mycanvas extends Canvas43
{ public void paint(Graphics g)44
{ g.drawImage(Wuqiong.img,0,0,Wuqiong.width,(Wuqiong.height)/3,this);45
}46
}47
48
//例子449
import java.applet.*;import java.awt.*;import java.awt.event.*;50
public class Example22_4 extends Applet implements MouseListener51
{ final int number=38; int count=0;52
Image[] card=new Image[number];53
public void init()54
{ addMouseListener(this);55
for(int i=0;i<number;i++)56
{ card[i]=getImage(getCodeBase(),"jiafei"+i+".jpg"); 57
}58
}59
public void paint(Graphics g)60
{ if((card[count])!=null)61
g.drawImage(card[count],10,10,62
card[count].getWidth(this),card[count].getHeight(this),this);63
}64
public void mousePressed(MouseEvent e)65
{ count++;66
if(count>number)67
count=0;68
repaint();69
}70
public void mouseReleased(MouseEvent e){}71
public void mouseEntered(MouseEvent e){}72
public void mouseExited(MouseEvent e){}73
public void mouseClicked(MouseEvent e){}74
}75
76
//例子577
import java.applet.*;import java.awt.*;import java.awt.event.*;78
public class Example22_5 extends Applet implements Runnable79
{ final int number=59; int count=0;80
Thread mythread;81
Image[] pic=new Image[number];82
public void init()83
{ for(int i=0;i<number;i++)84
{ pic[i]=getImage(getCodeBase(),"tom"+i+".jpg"); 85
}86
}87
public void start()88
{ mythread=new Thread(this);89
mythread.start();90
} 91
public void stop()92
{ mythread=null;93
}94
public void run()95
{ while(true) 96
{ if(count>59)97
count=0;98
repaint();99
count++;100
try{ mythread.sleep(200);101
}102
catch(InterruptedException e){}103
}104
} 105
public void paint(Graphics g)106
{ if((pic[count])!=null)107
g.drawImage(pic[count],10,10,108
pic[count].getWidth(this),pic[count].getHeight(this),this);109
}110
}111
112
//例子6113
import java.applet.*;import java.awt.*;114
import java.awt.event.*;115
class Imagecanvas extends Canvas 116
{ Toolkit tool; Image myimage;117
Imagecanvas()118
{ setSize(200,200);119
tool=getToolkit();//得到一个Toolkit对象。120
myimage=tool.getImage("apple.jpg");//由tool负责获取图像。121
}122
public void paint(Graphics g)123
{124
g.drawImage(myimage,10,10,myimage.getWidth(this),myimage.getHeight(this),this);125
}126
}127
public class Example22_6128
{ public static void main(String args[])129
{Imagecanvas canvas=new Imagecanvas();130
Frame frame=new Frame();131
frame.setLayout(new BorderLayout());132
frame.add(canvas,"Center"); frame.add("South",new Label());133
frame.add("West",new Label()); frame.add("North",new Label());134
frame.setSize(400,300);frame.setVisible(true);135
frame.pack();136
frame.addWindowListener(new WindowAdapter()137
{public void windowClosing(WindowEvent e)138
{System.exit(0);}139
});140
}141
} 142
143
//例子7144
import java.applet.*;import java.awt.*;145
import java.awt.event.*;146
class Imagecanvas extends Canvas implements MouseListener147
{final int number=59; int count=0; Toolkit tool;148
Image[] card=new Image[number];149
Imagecanvas()150
{ getSize(); tool=getToolkit(); addMouseListener(this);151
for(int i=0;i<number;i++)152
{card[i]=tool.getImage("tom"+i+".jpg"); 153
}154
}155
public void paint(Graphics g)156
{if((card[count])!=null)157
g.drawImage(card[count],10,10,158
card[count].getWidth(this),card[count].getHeight(this),this);159
}160
public Dimension getPreferredSize()161
{return new Dimension(160,100); 162
}163
public void mousePressed(MouseEvent e)164
{ count++;165
if(count>number-1)166
count=0;167
repaint();168
}169
public void mouseReleased(MouseEvent e){}170
public void mouseEntered(MouseEvent e){}171
public void mouseExited(MouseEvent e){}172
public void mouseClicked(MouseEvent e){}173
}174
public class Example226175
{ public static void main(String args[])176
{Imagecanvas canvas=new Imagecanvas();177
Frame frame=new Frame(); frame.setLayout(new BorderLayout());178
frame.add(canvas,"Center");179
frame.add("South",new Label());frame.add("West",new Label());180
frame.add("North",new Label());181
frame.setSize(400,300);frame.setVisible(true); frame.pack();182
frame.addWindowListener(new WindowAdapter()183
{public void windowClosing(WindowEvent e)184
{System.exit(0);}185
});186
}187
} 188
189
//例子8190
import java.awt.*;import java.awt.event.*;191
public class Frame_Icon192
{ public static void main(String args[])193
{ Frame frame=new Frame();194
Toolkit tool= frame.getToolkit();//得到一个Toolkit对象。195
Image myimage=tool.getImage("apple.jpg");//由tool负责获取图像。196
//设置窗口的图标是myimage指定的图象apple.jpg：197
frame.setIconImage(myimage); 198
frame.setSize(400,300);frame.setVisible(true);199
frame.addWindowListener(new WindowAdapter()200
{public void windowClosing(WindowEvent e)201
{ System.exit(0);202
}203
});204
}205
} 206
