Slow readng tzdb.dat

[Dr Heinz M. Kabutz]

Tom Hawtin wrote:
> On 09/10/2013 19:00, Dr Heinz M. Kabutz wrote:
>
>> That way, the resources are closed in the reverse order in which they
>> are opened and an exception in the middle of the creation chain does not
>> prevent the earlier resources from being closed.
>
> But there is only one resource.
>
>   File tzdb = new File(libDir, "tzdb.dat");
>   try (InputStream rawIn = new FileInputStream(tzdb)) {
>       DataInputStream dis = new DataInputStream(
>           new BufferedInputStream(rawIn, 32000)
>       );
But you've written it slightly differently from the original

  try (DataInputStream dis = new DataInputStream(                    
    new FileInputStream(new File(libDir, "tzdb.dat")))) {

Your code is also fine, as it isolates the resource that should be 
closed should something go wrong during the initialization of the 
DataInputStream / BufferedInputStream.  Either of our solutions would be 
good and it would just be a matter of how you'd like to scope the 
various local variables.