50分帮忙查一个程序错误。有源代码

[orant]

import java.awt.*;
import java.applet.Applet;

public class Breakout extends Applet implements Runnable{

//定义Applet的初始化变量
Dimension d;
Font largefont=new Font("Helvetica",Font.BOLD,25);
Font smallfont=new Font("Helvetica",Font.BOLD,13);
FontMetrics fmsmall,fmlarge;
Graphics goff;
Image ii;
Thread thethread;
boolean ingame=false;
int player1score,ballx,bally,batpos,batdpos=0,balldx=0,balldy=0,batheight;
int dxval,ballsleft,count;
boolean showtitle=true;
boolean[] showbrick;
int bricksperline;
final int borderwidth=5,batwidth=50,ballsize=5,
scoreheight=20,screendelay=300,brickwidth=15,brickheight=8,
brickspace=2,backcol=0x102040,numlines=4,startline=32;
public void init(){
Graphics g;
d=getSize();
setBackground(new Color(backcol));

bricksperline=(d.width-2*borderwidth)/(brickwidth+brickspace);

d.width=bricksperline*(brickwidth+brickspace)+(2*borderwidth);

g=getGraphics();

g.setFont(smallfont);

fmsmall=g.getFontMetrics();

g.setFont(largefont);

fmlarge=g.getFontMetrics();

showbrick=new boolean[bricksperline*numlines];

}
public void GameInit(){

batpos=(d.width-batwidth)/2;

ballx=(d.width-ballsize)/2;

bally=(d.height-ballsize-scoreheight-2*borderwidth);

player1score=0;

ballsleft=3;

dxval=2;

if(Math.random()<0.5)
balldx=dxval;
else
balldx=-dxval;

balldy=-dxval;

count=screendelay;

batdpos=0;

InitBricks();
}
public void InitBricks(){
for(int i=0;i<numlines*bricksperline;i++)
showbrick[i]=true;
}

public boolean keyDown(Event e,int key){
if(ingame){

if(key==Event.LEFT) batdpos=-3;
if(key==Event.RIGHT) batdpos=3;

if(key==Event.ESCAPE) ingame=false;
}
else{
if(key=='s'||key=='S'){
ingame=true;
GameInit();
}
}
return true;
}

public boolean keyUp(Event e,int key){
System.out.println("Key:"+key);

if(key==Event.LEFT||key==Event.RIGHT)
batdpos=0;
return true;
}

public void paint(Graphics g){
String s;
Graphics gg;

if(goff==null&&d.width>0&&d.height>0){
ii=createImage(d.width,d.height);
goff=ii.getGraphics();
}
if(goff==null||ii==null) return;
goff.setColor(new Color(backcol));
goff.fillRect(0,0,d.width,d.height);

if(ingame) PlayGame();
else ShowIntroScreen();

g.drawImage(ii,0,0,this);
}

public void PlayGame(){
MoveBall();
CheckBat();
CheckBricks();
DrawPlayField();
DrawBricks();
ShowScore();
}

public void ShowIntroScreen(){
String s;

MoveBall();
CheckBat();
CheckBricks();
BatDummyMove();
DrawPlayField();
CheckBricks();
ShowScore();
goff.setFont(largefont);
goff.setColor(new Color(96,128,255));

if(showtitle){
s="Bound Pane Game";
goff.drawString(s,(d.width-fmlarge.stringWidth(s))/2,
(d.height-scoreheight-borderwidth)/2-20);
s="Java Example Charter 10";

goff.setFont(smallfont);

goff.setColor(new Color(255,160,64));
goff.drawString(s,(d.width-fmlarge.stringWidth(s))/2,
(d.width-scoreheight-borderwidth)/2+10);

s="";
goff.drawString(s,(d.width-fmsmall.stringWidth(s))/2,
(d.height-scoreheight-borderwidth)/2+30);
}
else{
goff.setFont(smallfont);
goff.setColor(new Color(96,128,255));
s="press s to start game";
goff.drawString(s,(d.width-fmsmall.stringWidth(s))/2,
(d.height-scoreheight-borderwidth)/2-10);

goff.setColor(new Color(255,160,64));
s="Use left or right move the pane";
goff.drawString(s,(d.width-fmsmall.stringWidth(s))/2,(d.height-scoreheight-borderwidth)/2+20);
}

count--;
if(count<=0){
count=screendelay;
showtitle=!showtitle;
}
}

public void DrawBricks(){
int i,j;
boolean nobricks=true;
int colordelta=255/(numlines-1);

for(j=0;j<numlines;j++){
for(i=0;i<bricksperline;i++){

if(showbrick[j*bricksperline+i]){
nobricks=false;
goff.setColor(new Color(255,j*colordelta,255-j*colordelta));
goff.fillRect(borderwidth+i*(brickwidth+brickspace),
startline+j*(brickheight+brickspace),
brickwidth,brickheight);
}
}
}

if(nobricks){
InitBricks();
if(ingame)
player1score+=100;
}
}

public void DrawPlayField(){
goff.setColor(Color.white);
goff.fillRect(0,0,d.width,borderwidth);
goff.fillRect(0,0,borderwidth,d.height);
goff.fillRect(d.width-borderwidth,0,borderwidth,d.height);

goff.fillRect(batpos,d.height-2*borderwidth-scoreheight,batwidth,batheight);
goff.fillRect(ballx,bally,ballsize,ballsize);
}

[orant]

代码太长，分开写了。

public void ShowScore(){
String s;
goff.setFont(smallfont);
goff.setColor(Color.white);
s="Score:"+player1score;
goff.drawString(s,40,d.height-5);
s="Balls left:"+ballsleft;
goff.drawString(s,d.width-40-fmsmall.stringWidth(s),d.height-5);
}

public void MoveBall(){
ballx+=balldx;
bally+=balldy;
if(bally<=borderwidth){
balldy=-balldy;
bally=borderwidth;
}
if(bally>=(d.height-ballsize-scoreheight)){
if(ingame){
ballsleft--;
if(ballsleft<=0)
ingame=false;
}
ballx=batpos+(batwidth-ballsize)/2;
bally=startline+numlines*(brickheight+brickspace);
balldy=dxval;
balldx=0;
}
if(ballx>=(d.width-borderwidth-ballsize)){
balldx=-balldx;
ballx=d.width-borderwidth-ballsize;
}
if(ballx<=borderwidth){
balldx=-balldx;
ballx=borderwidth;
}
}

public void BatDummyMove(){
if(ballx<(batpos+2))
batpos-=3;
else if (ballx>(batpos+batwidth-3))
batpos+=3;
}

public void CheckBat(){
batpos+=batpos;
if(batpos<borderwidth)
batpos=borderwidth;
else if (batpos>(d.width-borderwidth-batwidth))
batpos=(d.width-borderwidth-batwidth);

if(bally>=(d.height-scoreheight-2*borderwidth-ballsize)&&
bally<(d.height-scoreheight-2*borderwidth)&&
(ballx+ballsize)>=batpos&&ballx<=(batpos+batwidth))
{
bally=d.height-scoreheight-2*borderwidth-ballsize;
bally=-dxval;
ballx=CheckBatBounce(balldx,ballx-batpos);
}
}

public int CheckBatBounce(int dy,int delta){
int sign;
int stepsize,i=-ballsize,j=0;
stepsize=(ballsize+batwidth)/8;

if(dy>0)
sign=1;
else
sign=-1;

while(i<batwidth&&delta>i){
i+=stepsize;
j++;
}

switch(j){
case 0:
case 1:return -4;
case 2:return -3;
case 7:return 3;
case 3:
case 6:return sign*2;
case 4:
case 5:return sign*1;
default:return 4;
}
}

public void CheckBricks(){
int i,j,x,y;
int xspeed=balldx;
if(xspeed<0) xspeed=-xspeed;
int ydir=balldy;
if (bally<(startline-ballsize)||bally>(startline+numlines*(brickspace+brickheight)))
return;
for(j=0;j<numlines;j++)
for(i=0;i<bricksperline;i++)
if(showbrick[j*bricksperline+i]){
y=startline+j*(brickspace+brickheight);
x=borderwidth+i*(brickspace+brickwidth);
if(bally>=(y-ballsize)&&bally<(y+brickheight)&&
ballx>=(x-ballsize)&&ballx<(x+brickwidth)){
showbrick[j*bricksperline+i]=false;
if(ingame)
player1score+=(numlines-j);
if(ballx>=(x-ballsize)&&ballx<=(x-ballsize+3)){
balldx=-xspeed;
}
else if (ballx<=(x+brickwidth-1)&&ballx>=(x+brickwidth-4)){
balldx=xspeed;
}
balldy=-ydir;
}
}


}

public void run(){
long starttime;
Graphics g;

Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
g=getGraphics();
while(true){
starttime=System.currentTimeMillis();
try{
paint(g);
starttime+=20;

Thread.sleep(Math.max(0,starttime-System.currentTimeMillis()));
}
catch(Exception e){
break;
}
}
}

public void start(){
if (thethread==null){
thethread=new Thread(this);
thethread.start();
}
}

public void stop(){
thethread=null;
}
}

[duoshanx]

好像是 Graphics g的问题，可是我也不知道怎么办？只有UP一下了。高手请进。、。。。。。、

[orant]

用JBUILDER编译后：
报：keyDown(java.awt.Event.int)in java.awt.Component has been deprecated at
line 77,column5
keyUp(java.awt.Event.int)in java.awt.Component has been deprecated at
line 94,column5

[Hodex]

keyDown(java.awt.Event.int)in java.awt.Component has been deprecated at
line 77,column5
只是个警告信息（上述说法是不推荐使用），并没错

[testjava]

抱歉，代码太长了

[orant]

但我没法运行啊郁闷

[testjava]

晕，代码太长了

[cookee]

编译的程序代码中使用了一些可能与新版的JDK冲突的（deprecation）的API