Re: What do you think about the for-each loop?

Adam P. Jenkins wrote: 
Dale King wrote:

Answering the more general question in the subject, I would like to see and even suggested to Sun that the same construct might be useful for I/O operations.

Consider this loop:

    for( int i; ( i = inputStream.read() ) != -1; )
    {
        byte b = (byte)i;

How about being able to replace that with:

    for( byte b : inputStream )
    {

And you could do a similar thing for reading lines with BufferedReader.


Actually the current foreach construct is already capable of this; inputStream would just need to implement java.lang.Iterable. So this would really be a request for a library enhancement. 

That would be a bit inefficient as you would be introducing an unneeded
object for every byte that is read.

For me, the main limitation to foreach's usefulness is that it doesn't work for Iterators. 

There is a potential of confusion if it worked for iterators. I can see
some confusion when you start getting into nested loops.

--
 Dale King
.

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