scg/ch04/NewtonsAppleAdvance

01 packagepackage is used to name the directory or folder a class is in scg.ch04;
02 
03 importimport means to make the classes and/or packages available in this program fang2.core.Game;
04 importimport means to make the classes and/or packages available in this program fang2.sprites.OvalSprite;
05 importimport means to make the classes and/or packages available in this program fang2.sprites.RectangleSprite;
06 
07 /** NewtonsApple pre-prototype */
08 publicpublic is used to indicate unrestricted access (any other class can have access) classclass is a group of fields and methods used for making objects NewtonsAppleAdvance
09   extendsextends means to customize or extend the functionality of a class Game {open braces start code blocks and must be matched with a close brace
10   // An OvalSprite field to name the apple
11   privateprivate is used to restrict access to the current class only OvalSprite apple;
12   // A RectangleSprite field to name newton
13   privateprivate is used to restrict access to the current class only RectangleSprite newton;
14 
15   /**
16    * Update the game state: only game state here is where the apple is;
17    * let it fall each frame. Velocity is 0.10 screen/second.
18    */
19   @Override
20   publicpublic is used to indicate unrestricted access (any other class can have access) voidvoid means the method does not return a value advance(doubledouble is the type for numbers that can contain decimal fractions secondsSinceLastCall) {open braces start code blocks and must be matched with a close brace
21     apple.translateY(0.10 * secondsSinceLastCall);
22   }close braces end code blocks and must match an earlier open brace
23   
24   // First pass at defining the sprites for the game
25   @Override
26   publicpublic is used to indicate unrestricted access (any other class can have access) voidvoid means the method does not return a value setup() {open braces start code blocks and must be matched with a close brace
27     apple =this assignment operator makes the left side equal to the right side newnew is used to create objects by calling the constructor OvalSprite(0.10, 0.10);
28     apple.setColor(getColor("red"));
29     apple.setLocation(0.50, 0.00);
30 
31     newton =this assignment operator makes the left side equal to the right side newnew is used to create objects by calling the constructor RectangleSprite(0.10, 0.10);
32     newton.setColor(getColor("green"));
33     newton.setLocation(0.50, 0.90);
34 
35     addSprite(newton);
36     addSprite(apple);
37   }close braces end code blocks and must match an earlier open brace
38 }close braces end code blocks and must match an earlier open brace
39 
40 //Uploaded on Mon Mar 29 21:41:53 EDT 2010