单项选择题

Public class Holt extends Thread{  
Private String sThreadName; 
 Public static void main(String argv[]) { 
Holt  h=new Holt(); h.go(); Holt(){}; 
Holt(String s){ sThreadName=s; 
Public String getThreadName() {  return sThreadName;} } 
Public void go(){ 
Hot first=new Hot("first"); first.start(); 
Hot second=new Hot("second"); second.start(); 
} 
Public void start() { 
For(int i=0;i<2;i++) { 
System.out.print(getThreadName()+i); Try{ 
Thread.sleep(100); }catch(Exception e){ 
System.out.print(e.getMessage()) ;  } } } 
} 
当编译运行上面代码时,将会出现() 

A.编译时错误
B.输出first0,second0,first0,second1
C.输出first0,first1,second10,second1
D.运行时错误

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