public class GameCanvas extends Screen {public static final int UP = 1;public static final int DOWN = 6;public static final int LEFT = 2;public static final int RIGHT = 5;public static final int FIRE = 8;public static final int GAME_A = 9;public static final int GAME_B = 10;public static final int GAME_C = 11;public static final int GAME_D = 12;public static final int KEY_NUM0 = 48;public static final int KEY_NUM1 = 49;public static final int KEY_NUM2 = 50;public static final int KEY_NUM3 = 51;public static final int KEY_NUM4 = 52;public static final int KEY_NUM5 = 53;public static final int KEY_NUM6 = 54;public static final int KEY_NUM7 = 55;public static final int KEY_NUM8 = 56;public static final int KEY_NUM9 = 57;public static final int KEY_STAR = 42;public static final int KEY_POUND = 35;}