多项选择题

class Order implements Runnable {   
public void run ()  { 
try { Thread.sleep (2000) ;  } catch (Exception e)   
System.out.print("in") ; 
public static void main (String [] args)  {   
Thread t = new Thread (new Order ()) ;   
t.start () ; 
System.out.print ("pre ") ; 
try { t.join () ;  } catch (Exception e)  { }   
System.out.print ("post") ;  
可产生哪两项结果?()  

A. pre in post
B. pre in
C. in post pre
D. in pre post
E. pre post in

相关考题