March 2002
Intermediate to advanced
480 pages
18h 40m
English
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Name
Package javax.microedition.rms
Synopsis
This package, whose class hierarchy is shown in Figure 17-1, allows MIDlets to store information on a device that will persist even when the MIDlet is not running. How the information is stored is device-specific and is not intended to be visible to MIDlets.
The key class in this package is RecordStore, which
represents a collection of records. Each record in the record store
is an array of bytes with an associated identifier. This identifier can
be used to retrieve the record, modify it, or delete it. MIDlets in the same
MIDlet suite can share record stores, but may not access (or even know of
the existence of) record stores in other suites. All record stores belonging
to a suite are automatically removed if the suite is removed from the device.
Records in a record store can be traversed by creating a
RecordEnumeration. The enumeration may contain all of the
records, or a subset filtered according to some MIDlet-defined criterion.
The order in which the records appear in the enumeration can
also be controlled through the use of a RecordComparator.
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.