IOException问题
jyn01 2003-08-21 12:28:45 class Prt {
int i;
Prt(){
try{
i=System.in.read();
System.out.println(i-48);
}catch(Exception e){
System.err.println("caught ");
e.printStackTrace(System.err);
}
}
/** Creates a new instance of Prt */
public static void main (String args [] ) {
Prt p=new Prt();
}
}
System.in.read()丢出来IOException但为什么到cast到Exception才能catch