Memory-Mapped File-(MappedByteBuffer )

[lenah]

i have very little understanding of MappedByteBuffer.

Could u pls anyone tell when and how exactly should concept be used? How far it is in use in the Market.

[neilcoffey]

Typical uses are essentially when you continually need to access a file "as though it was memory", for example in implementing a database. Unfortunately, Hotspot 1.4 on Windows had a serious bug that a mapped section of a file (and direct byte buffers in general) ssentially never got unmapped for the duration of the process, which made them essentailly unworkable. Not just sure if that's been fixed in later versions, but one would hope so.

[Krishnakanth]

Hi all,
I have joined newly in the community. I have excited how the members in the community are solving the problems. Iam facing the problem continuosly Jasper Exception.
JASPER Exception thrown while generating tooling pdf:net.sf.jasperreports.engine.JRException: java.util.ConcurrentModificationException: concurrent access to HashMap attempted by Thread
Can anyone help me out?

[Steve11235]

I believe you are using an OSS tool that is not handling an internal exception. I suggest going to the tool maker's Web site and looking in their bug tracker. They may have a work-around, or you may be able to report the problem, so they can fix it.