現(xiàn)有： 
class  Wrench2  {     
int size； 
public static void main（String  []  args）  {     
Wrench2 w=new Wrench2（）；     
w.size=II； 
Wrench2 w2=go（w， w.size）；    
System. out .print （w2. size）；     
} 
static Wrench2 go（Wrench2 wr. int s）  {     
S=12； 
return wr；    
}    
}
結果為（）    

現(xiàn)有： 
class Wrench f 
public static void main（String  []  args）  { 
Wrench w=new Wrench（）；    Wrench w2=new Wrench（）；    
w2=go （w， w2）；     
System.out.print （w2==w）；     
} 
static Wrench go （Wrench wrl，  Wrench wr2）  {    
Wrench wr3=wrl； wrl=wr2； wr2=wr3；    
return wr3；     
}      
結果是什么？（）