一、 利用J2ME實現Windows自帶的掃雷游戲。實現過程主要用的知識點：
1、MIDlet實現入口，控制屏幕和命令的控制。
2、數組，偵聽接口，線程，簡單的算法。
二、 具體的實現過程：
入口類的實現：
import Javax.microedition.lcdui.*;
import Javax.microedition.midlet.*;
public class gameStart extends MIDlet implements CommandListener {
public static gameStart midlet;
public myCanvas mc;
private Command exitCommand = new Command("Exit", Command.EXIT, 0);
public gameStart() {
gameStart.midlet = this;
}
public void startApp() {
gameStart.midlet.startGame();
}
public void pauseApp() {
}
public void destroyApp(boolean f) {
}
public void startGame() {
mc = null;
mc = new myCanvas();
Display.getDisplay(this).setCurrent(mc);
mc.addCommand(exitCommand);
mc.setCommandListener(this);
}
public void exitGame() {
destroyApp(false);
notifyDestroyed();
}
public void commandAction(Command cmd, Displayable arg1) {
if (cmd == exitCommand) {
destroyApp(false);
notifyDestroyed();
}
}
}其中實現游戲的開始，結束和偵聽用戶命令。
還可以實現MIDlet三個狀態的轉化（暫停、結束、開啟）。
實現類：
import Javax.microedition.lcdui.*;
import Java.util.*;
public class myCanvas extends Canvas{
public Image offScreen;
public Graphics offg;
public int map[][]=new int[8][8];
public Random r1;
public Image imCricle,imMine;//pic
public int px,py;
public int mineNumber=10;//¡Á¨¹¨¤&IExcl;Á¨ºy
public boolean gameOver=false;//¨®??¡¤¨º?&IExcl;¤??¨¢¨º?
public boolean gameWin=false;//¨®??¡¤¨º?¡¤?¨º&IExcl;訤?
public myCanvas()
{ offScreen=Image.createImage(149,180);
offg=offScreen.getGraphics();
try{
imCricle=Image.createImage("/cricle.png");
imMine=Image.createImage("/mine.png");
}catch(Exception e){}
r1=new Random();
initMap();//3?¨º??¡¥¨¤&IExcl;Á??
}
public void initMap()
{
for(int n=0;n<mineNumber;n++)
{int tmp=Math.abs(r1.nextInt()%64);
int row=tmp/8;//DD
int col=tmp%8;//¨¢D
if(map[row][col]!=20)
{ map[row][col]=20;//??¦Ì¨²rowDD¦Ì¨²col¨¢D¨¦¨¨3¨¦¨¤&IExcl;Á
}
else
{n--;}
}
}
public void drawMap()
{offg.setColor(0xFFFFFF);
offg.fillRect(0,0,176,208);
offg.setColor(0);
for(int i=0;i<8;i++)
{ for(int j=0;j<8;j++)
{offg.drawRect(j*20,i*20,20,20);
//¨¨?1?¡¤-?a?¨°??¨º??a¦Ì??¨¹?¡ì¦Ì?¨¤&IExcl;Á¨ºy
if(map[i][j]!=20&&map[i][j]!=0&&map[i][j]!=10)
{
offg.drawString(" "+map[i][j],j*20,i*20,0);
}
else if(map[i][j]==10)
{
offg.drawString(" 0",j*20,i*20,0);
}
}
}
}
public void drawCricle()
{
offg.drawImage(imCricle,px,py,0);
}
public void drawOver()//????¨®??&IExcl;¤?¨¢¨º?
{ offg.setColor(0xFFFFFF);
offg.fillRect(0,0,176,208);
offg.setColor(0);
offg.drawString("Game Over",30,30,0);
for(int i=0;i<8;i++)
{
for(int j=0;j<8;j++)
{if(map[i][j]==20)
{offg.drawImage(imMine,j*20,i*20,0);}
else
{offg.drawRect(j*20,i*20,20,20);}
}
}
}
public void drawWin()//????¨®??¡¤¨º&IExcl;訤?
{
offg.setColor(0xFFFFFF);
offg.fillRect(0,0,176,208);
offg.setColor(0);
offg.drawString("you Win",30,30,0);
}
public void paint(Graphics g)
{drawMap();//????¨¤&IExcl;Á??
drawCricle();//???????¨°
if(gameOver){drawOver();}
if(gameWin){drawWin();}
offg.drawString("new game exit",0,170,0);
g.drawImage(offScreen,0,0,0);
}
public void checkWin()
{ int count=0;//????&IExcl;¤-?a¦Ì?¨ºy¨¢?
for(int i=0;i<8;i++)
{
for(int j=0;j<8;j++)
{
if(map[i][j]>0)
{ count++;
}
}
}
if(count+this.mineNumber==64)
{ this.gameWin=true;
}
}
//map[r2][c2]?¨¹?¡ì¦Ì?¨¤&IExcl;Á¨ºy
public int checkNum(int r2,int c2)
{int num=0;
//&IExcl;Á¨®¨¦?
if(r2-1>=0&&c2-1>=0)//?D??¨º?¡¤?¨®D&IExcl;Á¨®¨¦?
{
if(map[r2-1][c2-1]==20){num++;}
}
//¨¦?
if(r2-1>=0)
{
if(map[r2-1][c2]==20)num++;
}
//¨®¨°¨¦?
if(r2-1>=0&&c2+1<=7)
{
if(map[r2-1][c2+1]==20)num++;
}
//&IExcl;笨
if(c2-1>=0)
{
if(map[r2][c2-1]==20)num++;
}
//¨®¨°
if(c2+1<=7)
{
if(map[r2][c2+1]==20)num++;
}
//&IExcl;笨??
if(r2+1<=7&&c2-1>=0)
{ if(map[r2+1][c2-1]==20)num++;
}
//??
if(r2+1<=7)
{
if(map[r2+1][c2]==20)num++;
}
//¨®¨°??
if(r2+1<=7&&c2+1<=7)
{
if(map[r2+1][c2+1]==20)num++;
}
return num;//?a¦Ì??¨¹?¡ì¦Ì?¨¤&IExcl;Á¨ºy
}
public void check(int row,int col)
{
if(map[row][col]==20)
{gameOver=true;}
else
{//?D?¡§?a¦Ì??¨¹?¡ì¦Ì?¨¤&IExcl;Á¨ºy
int k=this.checkNum(row,col);
if(k>0)//?a¦Ì??¨¹?&IExcl;쨮D¨¤¨¤
{ map[row][col]=k;//??¨º??a¦Ì??¨¹?¡ì¦Ì?¨¤&IExcl;Á¨ºy
}
else//?a¦Ì??¨¹?¡ì??¨®D¨¤&IExcl;Á
{ map[row][col]=10;//&IExcl;¤-?a?a¨°?¦Ì?
//?¨²?D???a¦Ì??¨¹?&IExcl;ì¦Ì??¨¦??
//&IExcl;Á¨®¨¦?
if(row-1>=0&&col-1>=0)
{ if(map[row-1][col-1]<10){//?D??¨º?¡¤?¡À?&IExcl;¤-?a
check(row-1,col-1);
}
}
//¨¦?
if(row-1>=0)
{ if(map[row-1][col]<10){//?D??¨º?¡¤?¡À?&IExcl;¤-?a
check(row-1,col);
}
}
//¨®¨°¨¦?
if(row-1>=0&&col+1<=7)
{ if(map[row-1][col+1]<10){//?D??¨º?¡¤?¡À?&IExcl;¤-?a
check(row-1,col+1);
}
}
//&IExcl;笨
if(col-1>=0)
{ if(map[row][col-1]<10){//?D??¨º?¡¤?¡À?&IExcl;¤-?a
check(row,col-1);
}
}
//¨®¨°
if(col+1<=7)
{ if(map[row][col+1]<10){//?D??¨º?¡¤?¡À?&IExcl;¤-?a
check(row,col+1);
}
}
//&IExcl;笨??
if(row+1<=7&&col-1>=0)
{ if(map[row+1][col-1]<10){//?D??¨º?¡¤?¡À?&IExcl;¤-?a
check(row+1,col-1);
}
}
//??
if(row+1<=7)
{ if(map[row+1][col]<10){//?D??¨º?¡¤?¡À?&IExcl;¤-?a
check(row+1,col);
}
}
//¨®¨°??
if(row+1<=7&&col+1<=7)
{ if(map[row+1][col+1]<10){//?D??¨º?¡¤?¡À?&IExcl;¤-?a
check(row+1,col+1);
}
}
}
}
}
public void keyPressed(int n)
{if(n==-6)
{gameStart.midlet.startGame();}
if(n==-7)
{gameStart.midlet.exitGame();}
int k=this.getGameAction(n);
switch(k)
{
case Canvas.UP:
if(py>=20) py-=20;
break;
case Canvas.DOWN:
if(py<=20*6){py+=20;}
break;
case Canvas.LEFT:
if(px>=20) px-=20;
break;
case
Canvas.RIGHT: if(px<=20*6)px+=20; break; case Canvas.FIRE: int seleRow=py/20;//¦Ì¡À?&IExcl;ã???¨°¦Ì??¨´?¨²DD int seleCol=px/20;//¦Ì¡À?&IExcl;ã???¨°¦Ì??¨´?¨²¨¢D check(seleRow,seleCol);//¨®??¡¤¡¤-?a¦Ì?¨¤&IExcl;Á¦Ì??¨¬2a //?¨¬2a1y1? checkWin(); } this.repaint(); this.serviceRepaints(); } }
在這個類中主要實現了屏幕的繪畫，實現其具體的算法，針對每種情況作出相應的處理。
三、編譯 運行 通過 之後打包 形成jar文件
我已經把jar放到了服務器上，手機可以直接訪問
