Does Java have asynchronized I/O?

[George Lin]

Hello everyone,


I am wondering whether Java has asynchronized I/O (whether built-in core Java SDK or 3rd party release), which is similar as select or poll in UNIX. Current read/write will be blocked when underlying stream is not ready. For example, when retrieving data from remote machine, we will be blocked if the remote machine will not response immediately.


Thanks in advance,
George

[Ernest Friedman-Hill]

Yes it does, in the java.nio package. This was added in JDK 1.4. Here's an article that gives you an idea of what you can do.

[David Harkness]

For your Googling pleasure, Java refers to this as "non-blocking I/O." Both Sun and IBM's tutorials are very good -- just the right balance of terseness and depth (for me anyway).

[Udegbunam Morah]

May be you can start from this link:
http://www.google.com/search?hl=en&q=Non-blocking+IO+in+Java

[Ilja Preuss]

Moving to IO...

[George Lin]

Thanks Ernest,

Originally posted by Ernest Friedman-Hill:
Yes it does, in the java.nio package. This was added in JDK 1.4. Here's an article that gives you an idea of what you can do.

Your reply is very helpful. I am using JDK 1.3, and do you know some solutions for JDK 1.3?


regards,
George

[George Lin]

Thanks Ilja,

Originally posted by Ilja Preuss:
Moving to IO...

I think this sub-forum is more suitable for my topic. Thanks again! :-)


regards,
George

[George Lin]

Thanks Udegbunam,

Originally posted by Udegbunam Morah:
May be you can start from this link:
http://www.google.com/search?hl=en&q=Non-blocking+IO+in+Java

Your suggestion is very helpful! I have found that if I want to use Non-blocking IO in JDK 1.3, I have to use a native wrapper (or have some dependencies on native libraries). Are there any pure Java Non-blocking IO libraries for JDK 1.3?


regards,
George

[George Lin]

Thanks David,

Originally posted by David Harkness:
For your Googling pleasure, Java refers to this as "non-blocking I/O." Both Sun and IBM's tutorials are very good -- just the right balance of terseness and depth (for me anyway).

Your reply is very helpful! I have found that if I want to use Non-blocking IO in JDK 1.3, I have to use a native wrapper (or have some dependencies on native libraries). Are there any pure Java Non-blocking IO libraries for JDK 1.3?


regards,
George