java语言的科学与艺术-编程练习2.9 

 1 /*
 2  * File：Rainbow.java
 3  * ---------------
 4  * This program draws a rainbow
 5  */
 6 import acm.graphics.*;
 7 import acm.program.*;
 8 import java.awt.*;
 9 public class Rainbow extends GraphicsProgram {
10     
11     public void run(){
12         /*blackground*/
13         GRect rect = new GRect(0,0,1500,1000);
14         
15         GOval oval1 = new GOval(-130,80,1000,1000);
16         GOval oval2 = new GOval(-120,90,980,980);
17         GOval oval3 = new GOval(-110,100,960,960);
18         GOval oval4 = new GOval(-100,110,940,940);
19         GOval oval5 = new GOval(-90,120,920,920);
20         GOval oval6 = new GOval(-80,130,900,900);
21         GOval oval7 = new GOval(-70,140,880,880);
22         
23         
24         /*
25          * set colors of rainbow
26          */
27         oval1.setColor(Color.RED);
28         oval2.setColor(Color.ORANGE);
29         oval3.setColor(Color.YELLOW);
30         oval4.setColor(Color.GREEN);
31         oval5.setColor(Color.BLUE);
32         oval6.setColor(Color.MAGENTA);
33         oval7.setColor(Color.CYAN);
34         
35         oval1.setFilled(true);
36         oval2.setFilled(true);
37         oval3.setFilled(true);
38         oval4.setFilled(true);
39         oval5.setFilled(true);
40         oval6.setFilled(true);
41         oval7.setFilled(true);
42         
43         rect.setColor(Color.CYAN);
44         rect.setFilled(true);
45         add (rect);
46         add (oval1);
47         add (oval2);
48         add (oval3);
49         add (oval4);
50         add (oval5);
51         add (oval6);
52         add (oval7);
53         
54     }
55 }

posted on 2012-12-02 20:48  mybluecode  阅读(191)  评论(0)    收藏  举报