J2ME Game code Example--Tetris (1)

Here is a simple Tetris game code I wrote, which consists of 3 classes:

Lterrismidlet--midlet class

lgamecanvas--Game Interface Class

lgameengine--Game Logic Class

Use WTK2.5.1 to run through.

The specific code is as follows:

//MIDlet类
import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.*;

public class TerrisMIDlet extends MIDlet {
　　　　 public TerrisMIDlet() {
　　　　　　　　　 Display.getDisplay(this).setCurrent(new GameCanvas());
　　　　 }
　　　　 protected void destroyApp(boolean arg0){}
　　　　 protected void pauseApp() {}
　　　　 protected void startApp() {}
}

//界面类
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;

/**

* Tetris Game interface

*/


public class Gamecanvas extends Canvasimplements runnable{


GameEngine engine = new GameEngine ();


int width;


int height;


/** Game End variable * *


Boolean gameover = false;


/** Game Suspend variable * *


Boolean ispaused = false;


String pausestr = "Paused";


String continuestr = "Continue";


public Gamecanvas () {


//Full screen


Setfullscreenmode (TRUE);


width = getwidth ();


height = getheight ();


//Start thread


thread th = new thread (this);


Th.start ();


　　 }


protected void Paint (Graphics g) {


//Clear Screen


Clearscreen (g);


//Draw Border


Paintboard (g);


//Drawing background


Engine.paintmap (g);


//Draw the current drop box


Engine.paintbrick (g);


//Draw next Square


Engine.paintnextbrick (g);


Draw checkpoints and game scores


Engine.paintlevelandscore (g);


//Draw game End


if (gameover) {


g.drawstring ("Game over", 30, 85,


Graphics.top | Graphics.left);


　　　　　　　 }


//Draw pause button text


if (ispaused) {


g.drawstring (Pausestr,width,height,


Graphics.right | Graphics.bottom);


}else{


g.drawstring (Continuestr,width,height,


Graphics.right | Graphics.bottom);


　　　　　　　 }


　　 }


public void keypressed (int keycode) {


if (keycode = = 7) {//Right soft key, pause control


ispaused =!ispaused;


　　　　　　　 }


if (!ispaused) {


int action = getgameaction (KeyCode);


switch (action) {


Case up:


Case FIRE:


Engine.changeshape ();


break;


Case left:


Engine.movetoleft ();


break;


Case Right:


engine.movetoright ();


break;


Case down:


engine.highspeed ()/Accelerate


break;


　　　　　　　　　　　 }


　　　　　　　 }


repaint ();


　　 }


public void keyreleased (int keycode) {


int action = getgameaction (KeyCode);


switch (action) {


Case down:


Engine.normalspeed (); Restore normal speed


break;


　　　　　　　 }


　　 }


　　 /**