In some cases, it is not possible to distribute files of the file format jar from a web site, since some web browsers (IE) may either treat them as dangerous (like. The rar format is a proprietary format owned by the company that makes the packing/unpacking program rar and winrar while jar is a container file format very close to the unix tar format, and was invented by the guys that created the programming language java. containing files in an organized directory structure. I'm not sure that you can generalize the jar/rar behaviour in that way! rar and jar are two entirely different file formats, even though they may serve the same purpose in some contexts, i.e.
Must open My Documents > Tools > Folder options > View > unmark Hide extention for known files > click OK
When download *.jar files with stupid Internet Explorer, IE save with extention *.rar !!!
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