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getSpecificationVersion() differences  RSS feed

 
hu jianlong
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why Package.getPackage("javax.servlet.jsp").getSpecificationVersion() is not same with JspFactory.getDefaultFactory().getEngineInfo().getSpecificationVersion()??

in my tomcat 7, the former return 2.1 and the latter returns 2.2, why??
 
It is sorta covered in the JavaRanch Style Guide.
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