JScience 3.0 發布了。JScience 是一款很有用的用于科學方面的Lib。新版本主要是更新了JDK1.5中的新特性。其他官方提到的新特性包括：A rigourous mapping of mathematical structures (Group, Ring, Field, etc.)A geographic coordinates module GIS/ISO compliant (with support for conversions between UTM, Lat/Long, XYZ, etc).A very useful measures module for exact or approximated measurements (also provides accurate physical constants)JScience units/quantities modules are now part of the JSR-275 (Units specification) namespace and should be included with the standard Java library sometimes in the future.