scg/ch04/NewtonsAppleJustSetup

01 packagepackage is used to name the directory or folder a class is in scg.ch04;
02 
03 // import fang2.attributes.Location2D;
04 importimport means to make the classes and/or packages available in this program fang2.core.Game;
05 importimport means to make the classes and/or packages available in this program fang2.sprites.OvalSprite;
06 importimport means to make the classes and/or packages available in this program fang2.sprites.RectangleSprite;
07 importimport means to make the classes and/or packages available in this program fang2.sprites.StringSprite;
08 
09 /**
10  * NewtonsAppleJustSetup - Randomly placed apples fall and
11  * mouse-controlled Newton must be under them when they fall. Score c/d
12  * where c is caught apples, d dropped apples:
13  *
14  * <p>NOT YET PLAYABLE
15  */
16 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 NewtonsAppleJustSetup
17   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
18   // ----- visual representations of the apple and physicist -----
19   /** on screen representation of the apple; a small red circle */
20   privateprivate is used to restrict access to the current class only OvalSprite apple;
21 
22   /** on screen representation of Newton; a small green square */
23   privateprivate is used to restrict access to the current class only RectangleSprite newton;
24 
25   // ----- keeping and displaying the score -----
26   /** number of apples caught */
27   privateprivate is used to restrict access to the current class only intint is the type for whole numbers and it is short for integer applesCaught;
28 
29   /** number of apples dropped */
30   privateprivate is used to restrict access to the current class only intint is the type for whole numbers and it is short for integer applesDropped;
31 
32   /** on-screen current score; update contents when score changes */
33   privateprivate is used to restrict access to the current class only StringSprite displayScore;
34 
35   /**
36    * place the apple at random x-coord at top of screen.
37    */
38   publicpublic is used to indicate unrestricted access (any other class can have access) voidvoid means the method does not return a value dropApple() {open braces start code blocks and must be matched with a close brace
39     apple.setLocation(randomDouble(), 0.00);
40     applesDropped =this assignment operator makes the left side equal to the right side applesDropped +adds two numbers together or concatenates Strings together 1;// another apple dropped
41   }close braces end code blocks and must match an earlier open brace
42 
43   /**
44    * The method called by FANG before the game starts. Include all
45    * "one-time" instructions in setup.
46    */
47   @Override
48   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
49     // initialize the score
50     applesCaught =this assignment operator makes the left side equal to the right side 0;
51     applesDropped =this assignment operator makes the left side equal to the right side 0;
52 
53     // The apple is small and red; its initial position is set randomly
54     // in the dropApple routine (called here and when apple bottoms out)
55     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);
56     apple.setColor(getColor("red"));
57     dropApple();
58 
59     // newton is small, green, at the middle bottom of the screen.
60     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);
61     newton.setColor(getColor("green"));
62     newton.setLocation(0.50, 0.90);
63 
64     displayScore =this assignment operator makes the left side equal to the right side newnew is used to create objects by calling the constructor StringSprite();
65     displayScore.setLineHeight(0.10);
66     displayScore.setColor(getColor("white"));
67     displayScore.topJustify();// move location to upper-left corner
68     displayScore.leftJustify();
69     displayScore.setLocation(0.00, 0.00);
70 
71     displayScore.setText("Score: " +adds two numbers together or concatenates Strings together applesCaught +adds two numbers together or concatenates Strings together "/" +adds two numbers together or concatenates Strings together
72       applesDropped);
73 
74     // must add all sprites we want drawn (or moved) to the game
75     addSprite(apple);
76     addSprite(newton);
77     addSprite(displayScore);
78   }close braces end code blocks and must match an earlier open brace
79 }close braces end code blocks and must match an earlier open brace
80 
81 //Uploaded on Mon Mar 29 21:41:33 EDT 2010