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jSql provides feature to filter the java collection using SQL similar syntax. Currently <,>,>=,<=,= ,and,or operators are supported, soon in,like,between and order by will be supported.
OpenXLS is the open source version of ExtenXLS -- a best-in-class Java spreadsheet SDK that allows you to read, modify and create Excel-compatible spreadsheets from your Java applications.
Supports Excel 97-2012 file formats.
Cognity is an object-oriented neural network library for Java. It's goal is to provide easy-to-use, high level architecture for neural network computations along with reasonable performance.
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Geom4J is a computational geometry library for Java. It contains implementation of the most important computational geometry data structures and algorithms coded in pure Java, designed for ease of use and optimized for performance.
A Message-Passing Interface (MPI) library, allowing a Java application to efficiently run on a distributed, parallel, and high performance architecture. Developed within HPJava project (www.hpjava.org), and maintained by LarKC project (www.larkc.eu)
ConnFarm is a high-performance database connection pool. The feature-set includes idle connection management, timeout controls, connection leak debugging capabilities, and JMX monitoring.
Another logging framework for Java. I try to balance flexibility, usabilty and performance using OOP. Currently the framework is usable but it lacks a lot of functionality.
The BalanceLine4j Project is an implementation of the Balance Line Algorithm for Java applications. The Balance Line is an algorithm used to make Coordinated Processing and Sequential Updates, that improves performance and saves machine resources.
Beet adds user behavior and performance tracking to a Spring-based Java app. HTTP requests, method calls, and SQL statements are tracked and associated to user and session. includes XML, binary XML, and JDBC loggers. See http://beet.sourceforge.net.
An add-on package for implementations of Contexts and Dependency Injection for the Java EE platform (CDI - JSR-299) providing convenient integration with Perf4j - performance monitoring library for Java applications.
A C/D/Java style programming language with built in support for concurrent programming (microthreads, actor model). It is implemented as a LLVM front end to allow for native X86 high performance code generation.
This simple project provides a way to efficiently calculate the actual memory use of any Java object. The class makes use of the JVMs own instrumentation support to calculate the object memory use in a portable way.
VT-Layer is a Java library for discrete-event simulation modeling. VT-Layer allows you to create, visualize, and analyze high-performance discrete-event simulations.
Tying together Zend Framework, PHP/Java Bridge, JTOpen, and Tomcat to provide a FOSS solution for i5 (IBM i, iSeries, AS/400) PHP developers struggling with the performance issues of the Integrated File System.