finally block is optional??

[Matt]

I want to know if finally block is optional? I tested this myself, and
the following yield the same output.

void f()
{
try
{ //code1
}
catch()
{
}
finally
{ //code2
}
}

void f()
{
try
{ //code1
}
catch()
{
}
//code2
}


please advise. thanks!!

 

[Tony Morris]

I want to know if finally block is optional? I tested this myself, and
the following yield the same output.

void f()
{
try
{ //code1
}
catch()
{
}
finally
{ //code2
}
}

void f()
{
try
{ //code1
}
catch()
{
}
//code2
}


please advise. thanks!!

Yes it's optional.
In your example, you aren't guaranteed the same result each time.
Hence, there is a purpose to the use of a finally block.

http://java.sun.com/docs/books/tutorial/essential/exceptions/index.html

Good luck

--
Tony Morris
(BInfTech, Cert 3 I.T.)
Software Engineer
(2003 VTR1000F)
Sun Certified Programmer for the Java 2 Platform (1.4)
Sun Certified Developer for the Java 2 Platform

 

[Liz]

it is optional

 

[Liz]

it is optional

 

[Stefan Waldmann]

I want to know if finally block is optional? I tested this myself, and
the following yield the same output.

[snip]
please advise. thanks!!

Hi,

yes, it's optional. You only need it, if you want code to be executed in
any case, even if an exception is thrown. You can even write a
try/finally without catch, for example:

public static void finallyTest() throws Exception
{
try {
throw new Exception("my very own Exception");
}
finally {
System.out.println("This is printed anyway");
}

}


Stefan


P.S.: You'd rather post your newbie questions in comp.lang.java.help, or
better, get a book where basics like this are explained, for example
"Thinking in Java" by Bruce Eckel - free to download from one of the
mirrors at:

<http://mindview.net/Books/TIJ/DownloadSites>

Thanks!

 

[Guest]

I want to know if finally block is optional? I tested this myself, and
the following yield the same output.

Not always.
E.g. 1. If code1 throws an exception not catched by your catch statement
then code2 is not executed in your second example.
E.g. 2. If your catch statement throw an exception
then code2 is not executed in your second example.
E.g. 3. etc...

- Dario

 

[Liz]

it is optional