java工程开发之图形化界面之（第四课）

 1 package 一个事例图形小应用程序;
 2 import javax.swing.JApplet;
 3 import java.awt.*;
 4 import java.awt.Color;
 5 import java.awt.Graphics;
 6 //Graphics and Color
 7 
 8 public class differentFace extends JApplet
 9 {
10     public static final int FACE_DIAMETER = 50;
11     public static final int X_FACEO = 10;
12     public static final int Y_FACEO = 5;
13     
14     public static final int EYE_WIDTH = 5;
15     public static final int EYE_HIGHT = 10;
16     public static final int X_RIGHT_EYEO = 20;
17     public static final int Y_RIGHT_EYEO = 15;
18     public static final int X_LEFT_EYEO = 45;
19     public static final int Y_LEFT_EYEO = Y_RIGHT_EYEO;
20     
21     public static final int NOSE_DIAMETER = 5;
22     public static final int X_NOSEO = 32;
23     public static final int Y_NOSEO = 25;
24     
25     public static final int MOUTH_WIDTH = 30;
26     public static final int MOUTH_HEIGHTO = 0;
27     public static final int X_MOUTHO = 20;
28     public static final int Y_MOUTHO = 35;
29     public static final int MOUTH_START_ANGLE = 180;
30     public static final int MOUTH_EXTENT_ANGLE = 180;
31     
32     public void paint(Graphics canvas){
33         int i,xOffset,yOffset;//希望循环结束后i的值还是要存在
34         for(i = 0; i <= 4; i++){
35             //画出一张脸
36             xOffset = 50 * i;
37             yOffset = 30 * i;
38             
39             if(i%2==0){
40                 canvas.setColor(Color.LIGHT_GRAY);
41                 canvas.fillOval(X_FACEO + xOffset, Y_FACEO + 30 * i, FACE_DIAMETER,FACE_DIAMETER);
42             }
43             canvas.setColor(Color.BLACK);
44             canvas.drawOval(X_FACEO + xOffset, Y_FACEO + yOffset, FACE_DIAMETER, FACE_DIAMETER);
45             //画出眼睛
46             canvas.setColor(Color.BLACK);
47             canvas.fillOval(X_RIGHT_EYEO + xOffset, yOffset + Y_RIGHT_EYEO, EYE_WIDTH, EYE_HIGHT);
48             canvas.fillOval(X_LEFT_EYEO + xOffset, yOffset + Y_LEFT_EYEO, EYE_WIDTH, EYE_HIGHT);
49             //画鼻子
50             canvas.setColor(Color.black);
51             canvas.fillOval(X_NOSEO + xOffset, Y_NOSEO + yOffset, NOSE_DIAMETER, NOSE_DIAMETER );
52             //画嘴巴
53             canvas.setColor(Color.black);
54             canvas.drawArc(X_MOUTHO + xOffset, Y_MOUTHO + yOffset, MOUTH_WIDTH, MOUTH_HEIGHTO + 3 * i, MOUTH_START_ANGLE, MOUTH_EXTENT_ANGLE);
55             
56         }
57         //循环结束后i的值为5
58         xOffset = 50 * i;
59         yOffset = 30 * i;
60         canvas.setColor(Color.BLACK);
61         canvas.drawOval(X_FACEO + xOffset, Y_FACEO + yOffset,FACE_DIAMETER,FACE_DIAMETER);

　　　　　　　　canvas.drawString("zhangjie is a hardworking boy", X_FACEO+xOffset+FACE_DIAMETER, Y_FACEO+yOffset);

62     }
63     
64 }