开源Java工具、jar包

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http://zhanglinux2008.iteye.com/blog/552698

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1.计算类，算法类，效率类

1-1.   colt.jar

      http://acs.lbl.gov/~hoschek/colt/

      Welcome to the Colt Project.

      Colt provides a set of Open Source Libraries for High Performance Scientific and Technical Computing in Java.



1-2.    Ninja: Numerically Intensive Java

       http://www.research.ibm.com/ninja/

       IBM Watson's Ninja project showed that Java can indeed perform BLAS matrix computations up to 90% as fast as optimized Fortran.



1-3.    http://math.nist.gov/javanumerics/      

       The JavaNumerics page provides a focal point for information on numerical computing in Java. This is an activity of the Java Grande Forum Numerics Working Group, chaired by Ron Boisvert and Roldan Pozo.



2.数据挖掘类，机器学习类，人工智能类

2-1.   weka是机器学习和数据挖掘领域最有影响力的开源项目之一，大量实用的代码

      http://www.cs.waikato.ac.nz/ml/weka/

      http://forum.wekacn.org/



3.   JFreeChart

      http://www.jfree.org/jfreechart/

      JFreeChart is a free 100% Java chart library that makes it easy for developers to display professional quality charts in their applications.