jam/GravityTrackerTest

01 packagepackage is used to name the directory or folder a class is in jam;
02 
03 importimport means to make the classes and/or packages available in this program wiki.Wiki;
04 importimport means to make the classes and/or packages available in this program fang.*;
05 importimport means to make the classes and/or packages available in this program java.awt.*;
06 importimport means to make the classes and/or packages available in this program java.awt.geom.*;
07 
08 /**
09  * All about my game here.
10  * @authorthis is the Javadoc tag for documenting who created the source code Jam Jenkins
11  */
12 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 GravityTrackerTest extendsextends means to customize or extend the functionality of a class GameLoop
13 {open braces start code blocks and must be matched with a close brace
14   /**an oval*/
15   privateprivate is used to restrict access to the current class only Sprite oval;
16   privateprivate is used to restrict access to the current class only GravityTracker tracker;
17   /**sets up the game*/
18   publicpublic is used to indicate unrestricted access (any other class can have access) voidvoid means the method does not return a value startGame()
19   {open braces start code blocks and must be matched with a close brace
20     makeSprites();
21     addSprites();
22   }close braces end code blocks and must match an earlier open brace
23 
24   /**makes the sprites*/
25   privateprivate is used to restrict access to the current class only voidvoid means the method does not return a value makeSprites()
26   {open braces start code blocks and must be matched with a close brace
27     oval=this assignment operator makes the left side equal to the right sidenewnew is used to create objects by calling the constructor OvalSprite(2, 1);
28     oval.setScale(0.75);
29     oval.setLocation(0.5, 0.5);
30     tracker=this assignment operator makes the left side equal to the right sidenewnew is used to create objects by calling the constructor GravityTracker(0, -0.25);
31     oval.setTracker(tracker);
32   }close braces end code blocks and must match an earlier open brace
33 
34   /**adds the sprites to the screen*/
35   privateprivate is used to restrict access to the current class only voidvoid means the method does not return a value addSprites()
36   {open braces start code blocks and must be matched with a close brace
37     canvas.addSprite(oval);
38   }close braces end code blocks and must match an earlier open brace
39 
40   /**handle input and game events*/
41   publicpublic is used to indicate unrestricted access (any other class can have access) voidvoid means the method does not return a value advanceFrame(doubledouble is the type for numbers that can contain decimal fractions timePassed)
42   {open braces start code blocks and must be matched with a close brace
43     ifif executes the next statement only if the condition in parenthesis evaluates to true(oval.getLocation().y>0.8)
44     {open braces start code blocks and must be matched with a close brace
45       tracker.setVelocity(newnew is used to create objects by calling the constructor Point2D.Double(0, -0.25));
46     }close braces end code blocks and must match an earlier open brace
47     ifif executes the next statement only if the condition in parenthesis evaluates to true(getPlayer().getMouse().getClickLocation()!=this is the not equals operator which evaluates to true if both sides are differentnullnull is the value used to refer to a non-existant object)
48     {open braces start code blocks and must be matched with a close brace
49       tracker.setGravityAmount(0.2);
50     }close braces end code blocks and must match an earlier open brace
51   }close braces end code blocks and must match an earlier open brace
52 }close braces end code blocks and must match an earlier open brace