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Java Forum / First Aid / November 2006

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Mapping a big file into memory

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Sanjay - 08 Nov 2006 05:11 GMT
Hi all,
There is a big file and instead of loading this whole file i want to
a part of the file loaded into memory.And want to perform searching on
the
loaded part if the required data is not available unload that Memory
part.And
go for the mapping of rest part of the file..ie i want to implement
similar to demand paging using java.
Plz help me out.. with sample code
Any help would be very appreciated.
Nicholas Sherlock - 08 Nov 2006 05:57 GMT
> Hi all,
> There is a big file and instead of loading this whole file i want to
[quoted text clipped - 4 lines]
> go for the mapping of rest part of the file..ie i want to implement
> similar to demand paging using java.

It looks like java.nio provides this in the MappedByteBuffer class:

http://java.sun.com/j2se/1.4.2/docs/api/java/nio/MappedByteBuffer.html

Cheers,
Nicholas Sherlock

Signature

http://www.sherlocksoftware.org



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