时钟的问题
import java.util.*;
import java.awt.*;
import java.applet.*;
import java.text.*;
public class JdkClock extends Applet implements Runable{
Thread timer=null;
Image clockp,sings[],animal[];
int s,m,h,hh;
AudioClip ipAu,towerAu;
boolean canPaint=true;
boolean flag=false;
boolean strike=true;
int counter=0;
int lasts;
Image offscreen_buff=null;
Graphics offg;
int i,j,t=0;
int timeout=166;
String img_name[]={ "t0 ", "t3 ", "t2 ", "t1 ", "t2 ", "t3 ", "t0 ", "t4 ", "t5 ", "t6 ", "t5 ", "t4 "};
String gif_name[]={ "1 ", "2 ", "3 ", "4 ", "5 ", "6 ", "7 ", "8 ", "9 ", "10 ", "11 ", "12 "};
int lastxs=0,lastys=0,lastxm=0,lastym=0,lastxh=0,lastyh=0;
Date dummy=new Date();
GregorianCalendar cal=new GregorianCaleadar();
SimpleDateFormat df=new SimpleDateFormat( "yyyyMMddHH:mm:ss ");
String lastdate=df.format(dummy);
Font F=new Font( "TimesRoman ",Font.PLAIN,14);
Font S=new Font( "宋体 ",Font.BOLD,90);
Date dat=null;
Color fgcol=color.black;
Color fgcol2=color.blue;
Color white=new Color(255,255,255);
public void init(){
ipAu=getAudioClip(getCodeBase(), "ip.au ");
towerAu=getAudioClip(getCodeBase, "TowerClock.au ");
offscreen_buf=creatImage(700,500);
offg=offscreen_buf.getGrapics();
simgs=new Image[12];
animal=new Image[12];
int xcenter,ycenter,s,m,h;
xcenter=315;
ycenter=112;
s=(int)cal.get(Calendar.SECOND);
m=(int)cal.get(Calendar.MIMUTE);
h=(int)cal.get(calendar.HOUR_OF_DAY);
if(h <4)
h=h+24-4;
else h=h-4;
lastxs=(int)(Math.cos(s*3.14f/30-3.14f/2)*15+xcenter);
lastys=(int)(Math.sin(s*3.14f/30-3.14f/2)*15+ycenter);
lastxm=(int)(Math.cos(m*3.14f/30-3.14f/2)*13+xcenter);
lastym=(int)(Math.sin(m*3.14f/30-3.14f/2)*13+ycenter);
lastxh=(int)(Math.cos((h*30+m/2)*3.14f/180-3.14f/2)*9+xcenter);
lastyh=(int)(Math.sin((h*30+m/2)*3.14f/180-3.14f/2)*9+ycenter);
lasts=s;
if(h <12)
if(h!=11)hh=h+1;
else hh=0;
else
if(h!=23)hh=h-12+1;
else hh=0;
MediaTracker mt=new MediaTracker(this);
for(i=0;i <12;i++){
simgs[i]=getImage(getCodeBase(),img_name[i]+ ".gif ");
mt.addImage(simgs[i],i);

}
clockp=getImage(getDocumentBase(), "clockp.gif ");
mt.addImage(clockp,i++);
try{mt.waitForAU();}catch(InterruptedException e){};
MediaTracker mt=new MediaTracker(this);
for(j=0;j <12;j++){
animal[j]=getImage(getCodeBase(),gif_name[j]+ ",gif ");
mt.addImage(animal[j],j);
}
try{mt.waitForAll();}catch(InterruptedException e){};
}
public void panit(Graphics g){
int xh,yh,xm,ym,xs,ys,strike_times;
int xcenter,ycenter;
String today;
Integer gif_number;
g.setColor(white);
g.fillRect(1,1,738,499);
xcenter=315;
ycenter=112;
dat=new Date();
cal.setTime(dat);
s=(int)cal.get(Calendar.SECOND);
m=(int)cal.get(Calendar.MIMUTE);
h=(int)cal.get(calendar.HOUR_OF_DAY);
today=df.format(dat);
if(h <4)
h=h+24-4;
else h=h-4;
lastxs=(int)(Math.cos(s*3.14f/30-3.14f/2)*15+xcenter);
lastys=(int)(Math.sin(s*3.14f/30-3.14f/2)*15+ycenter);
lastxm=(int)(Math.cos(m*3.14f/30-3.14f/2)*13+xcenter);
lastym=(int)(Math.sin(m*3.14f/30-3.14f/2)*13+ycenter);
lastxh=(int)(Math.cos((h*30+m/2)*3.14f/180-3.14f/2)*9+xcenter);
lastyh=(int)(Math.sin((h*30+m/2)*3.14f/180-3.14f/2)*9+ycenter);
for(int loop=0;loop <100;loop++)
{int x=(int)(java.lang.Math.random()*740);
int y=(int)(java.lang.Math.random()*500);
int red=(int)(java.lang.Math.random()*255);
int green=(int)(java.lang.Math.random()*255);
int blue=(int)(java.lang.Math.random()*255);
g.setColor(new Color(red,green,blue));
if((red> 70)&&(green> 70)&&(blue> 70));
g.drawString( "* ",x,y);
lastxs=xs;lastys=ys;
lastxm=xm;lastym=ym;
lastxh=xh;lastyh=yh;
lastdate=today;
if(h <12)hh=h;
else hh=h-12;
if(hh==0)strike_times=hh;
if((s==0&&m==0)||flag){
if(counter <strike_times){
flag=true;
if(lasts!=s){
if(strike){

counter++;
towerAu.play();
}
if(strike)strike=false;
else strike=true;
}
}
else{counter=0;
flag=false;
}
}else
if(lasts!=s)
ipAu.play();
lasts=s;
if(s <=20&&m==0)
g.drawImage(animal[hh],390,105,this);
if(canPaint){
t+=1;
if(t==12)t=0;}
g.drawImage(Simgs[t],270,140,this);
if(canPaint){
t+=1;
if(t==12)t=0;}
g.drawImage(Simgs[t],270,140,this);
swith(t);
{case0:g.setColor(Color.black);break;
case1:g.setColor(Color.magenta);break;
case2:g.setColor(Color.blue);break;
}
g.setFont(s);
g.drawString( "大摆钟 ",115,380);
for(int delay=0;delay <20000;delay++);
g.setFont(F);
g.drawImage(clockp,280,71,this);
g.setColor(fgco12);
g.setColor(getBackground());
g.setColor(fgco12);
g.drawString(today,275,420);
g.drawLine(xcenter,ycenter,xs,ys);
g.setColor(fgco);
g.drawLine(xcenter,ycenter-1,xm,ym);
g.drawLine(xcenter-1,ycenter,xm,ym);
g.drawLine(xcenter,ycenter-1,xh,yh);
g.drawLine(xcenter-1,ycenter,xh,yh);
g.setColor(newColor(150,200,150));
canPaint=false;
dat=null;
}
public void start()
{

if(timer==null)
{
timer=new Thread(this);
timer.start();
}
}
public void stop(){
timer.stop();
timer=null;
}
public void run(){
while(timer!=null){
try{timer.sleep(timeout);}catch(
InterruptedException e){}
canPaint=true;
repaint();
}
timer=null;
}
public void update(Graphics g){
if (offscreen_buf==null){
offscreen_buf=createImage(740,500);
}
offg.clipRect(1,1,739,499);
paint(offg);
g.drawImage(offsceen_buf,0,0,this);
}
}

编译的话老是提示第173行public void start()非法的表达式开始，百思不得其解，我用的是jdk1_6_01

[解决办法]
晕的不行了。好像不是一处有错。Runable没有这个接口吧。除非你自定义的。应该是
Runnable
[解决办法]
你错的不止一个地方啊 ，自己从新测试一下！
[解决办法]
太多了