利用Java 开发的一个手机版的潜艇游戏。游戏实现的重点就是屏幕的绘制滚动技术和碰撞检测技术

				/*
				 * Author: Huang ye(www.hyweb.net)
				 * 代码开源, 引用请注明出处
				 *
				 * 创建日期 2005-3-9
				 *
				 * TODO 要更改此生成的文件的模板，请转至
				 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
				 */
				package mysubmarine;
				
				import javax.microedition.lcdui.Display;
				import javax.microedition.lcdui.Alert;
				import javax.microedition.lcdui.AlertType;
				
				import javax.microedition.midlet.MIDletStateChangeException;
				
				/**
				 * @author user
				 *
				 * TODO 要更改此生成的类型注释的模板，请转至
				 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
				 */
				public class Controller {
				    private MysubmarineMIDlet subMIDlet;
				    private MySubmarineCanvas subCanvas;
				    private MenuUI menuUI;
				
				    private Display display;
				
				    public static final byte EVENT_START = 01;
				    public static final byte EVENT_ABOUT = 02;
				    public static final byte EVENT_EXIT = 03;
				
				    public static final byte EVENT_MENU = 101;
				    public static final byte EVENT_MENU_GAMEOVER = 102;
				    public static final byte EVENT_NEXTROUND = 103;
				
				    public Controller(MysubmarineMIDlet subMIDlet) {
				        this.subMIDlet = subMIDlet;
				
				        display = Display.getDisplay(subMIDlet);
				
				        //menuUI = new MenuUI(this);
				
				        this.EventHandler(EVENT_MENU);
				
				    }
				
				    public void EventHandler(byte eventID) {
				
				        switch (eventID) {
				
				        case EVENT_START: {
				            //开始游戏
				            if (subCanvas == null) {
				                subCanvas = new MySubmarineCanvas(this);
				            } else {
				
				            }
				            display.setCurrent(subCanvas);
				            break;
				        }
				
				        case EVENT_ABOUT: {
				            //说明文件
				            Alert alert = new Alert("About", "This is a Demo Edition Game .", null,
				                                    AlertType.INFO);
				            alert.setTimeout(3000);
				            display.setCurrent(alert, menuUI);
				            break;
				        }
				
				        case EVENT_NEXTROUND: {
				            //开启一个新的线程，显示下一轮字样
				            //原先画布线程则更换地图信息
				            Thread t = new Thread() {
				                public void run() {
				                    StringBuffer sbf = new StringBuffer("Round " +
				                            (MySubmarineCanvas.nLevel));
				                    display.setCurrent(new InfoCanvas(sbf) {});
				
				                    try {
				                        Thread.sleep(2000);
				                    } catch (InterruptedException e) {
				                        e.printStackTrace();
				                    }
				
				                    display.setCurrent(subCanvas);
				                    subCanvas.active();
				                }
				            };
				            t.start();
				            break;
				        }
				
				        case EVENT_EXIT: {
				            //退出程序
				            subMIDlet.destroyApp(false);
				            subMIDlet.notifyDestroyed();
				            break;
				        }
				
				        case EVENT_MENU: {
				            display.setCurrent(menuUI);
				            break;
				        }
				
				        case EVENT_MENU_GAMEOVER: {
				            StringBuffer sbf = new StringBuffer("Game Over");
				            display.setCurrent(new InfoCanvas(sbf) {});
				            subCanvas = null;
				
				            try {
				                Thread.sleep(1000);
				            } catch (InterruptedException e) {
				                e.printStackTrace();
				            }
				
				            display.setCurrent(menuUI);
				            break;
				        }
				
				        default:
				            break;
				        }
				    }
				
				}