why should not caught Exception

[pooja jain]

try {
doStuff();
}
catch(Exception e) {
e.printStackTrace();
}

I know that this is not recommended , but what exactly the reason ?
In which situation , it is recommended ?
In K&B book it is given that , you will not get proper message ( log ) if you will use this , I am not getting why ?
e.printStackTrace() will be called based on object ( Exception ) type ( late binding ) , so I think we will get proper message .

please help me .
Thanks in advance .

[ankur rathi]

One reason may be this : In real project , we never just write printStackTrace() method in a catch block , we do something specific depends on exception type .

Like if there is FileNotFoundException then we can provide any local file . So we catch exception separately & do something specific for them .

In which situation , it is recommended ?

Well , I don't think , it is recommended in any situation .