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Title: Programming/Languages/Java/Class Libraries - Primitive Collections for Java A collections framework for primitive Java types. The framework supports all primitive types and includes bridges to the standard Java Collections Framework. [Open source, LGPL]
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Primitive Collections for Java.title { text-align: center;}.listhead { font-weight: bold;}

Primitive Collections for Java

Latest release is: pcj 1.2, August 27, 2003Søren Bak

News

August 27, 2003: pcj v1.2 releasedMarch 7, 2003: Bugfix release 1.1.1March 5, 2003: pcj v1.1 releasedFebruary 17, 2003: PCJ 1.0 releasedJanuary 15, 2003: PCJ 1.0 beta 1 releasedJanuary 7, 2003: PCJ 1.0 alpha 2 releasedDecember 29, 2002: Primitive Collections for Java 1.0 alpha 1 released

Downloads & documentation

Download the latest release,or view the release notes.You can view the API documentationand developer's guideonline.

Overview

Primitive Collections for Java (PCJ) is a set of collection classes for primitive data types in Java. The goal is to provide anefficient alternative to the Java Collections Framework (JCF) when using primitivedata types, such as int, boolean,or double.Some of its main features are:Interface hierarchy for all primitive types.PCJprovides symmetrical interface hierarchy for each of the primitiveJava data types: boolean, char, byte, short, int, long, float, and double.Each hierarchy includes interfaces for general collections,sets,lists,andmaps.To increase the learning rate and make adaptions easier to implement, each hierarchy resembles the interfaces ofJCFas close as possible.Full interoperability with JCF classes.Each of the main collection interfaces is accompanied by adaptersto and from the correspondingJCF collections. Adaption is made convenient by factory methods in the Adapterclass.Specialized implementations.While JCF and many of the classes in PCJ perform well in the general case, much can be saved by choosing a more specialized and restricted implementation.PCJ provides a number of such classes, including range based sets (seefor example CharRangeSet)and bit array based sets (see for example IntBitSet).High Performance.Benchmarks show good performance results forPCJcollections. The benchmark results are available in the the developer's guide.

Feedback

Any kind of constructive feedback is welcome, and will be credited properly.If you use PCJfor a project, I will ask you to post a link or a noteto the forum pagesat SourceForge or send me an e-mail.This is of course not a requirement, but it will help determine thefuture direction ofPCJ.Bugs can be reported to the bug trackerat SourceForge.You are always welcome to request new features using the feature request trackerat SourceForge.

Credits

Matt Ayres found and reported some nasty bugs in the map implementations.Gabriel Jones suggested and discussed with me how to create collectioninstances from arrays and strings. He also suggested the addition of the ObjectKeyTMap classes.Morten Wittrock suggested that a guide and examples was included. (Thenecessity of this was not clear to me due to the closeresemblance ofPCJtoJCF.) Healso suggested support for JDK1.3 and some simplificationsof the code.Jonathan Oexner suggested and discussed with me validation of adapted JCFcollections.Joshua Bloch provided the basic interface designof the Java Collections Framework on whichPCJis based.

Other collections libraries

Besides PCJ,there are a number of other primitive collection libraries around.If you intend to use a primitive collections library in yourproject, you should definitely have a look at the others as well.Some of them are listed below:GNU TroveHigh performance collections for Java Objects and primitive types.GNU Trove is created by Eric D. Friedman.ColtOpen Source Libraries for High Performance Scientific and Technical Computing in Java.Colt is created by Wolfgang Hoschek.tclibtclib is a library/framework for type-specific collections in Java. tclib is created by Dennis Sosnoski.Last updated: August 27, 2003This project is hosted at SourceForge:SourceForge.net Logo
 

A

collections

framework

for

primitive

Java

types.

The

framework

supports

all

primitive

types

and

includes

bridges

to

the

standard

Java

Collections

Framework.

[Open

source,

LGPL]

http://pcj.sourceforge.net/

Primitive Collections for Java 2008 August

dvd rental

dvd


A collections framework for primitive Java types. The framework supports all primitive types and includes bridges to the standard Java Collections Framework. [Open source, LGPL]

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