Java Experts Community-JEC

Advantage of UNIX os over MicroSoft os ?
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1.MultiUser (Ms also)
2.MultiTasking (Ms also)
3.OpenSystem(Source code is available)
4.No Down Time(There is no time limit ,But Ms os system after some time automaticaly shutDown and restart again
eg:-after installing a software in ms os it need to restart again to provide the Service of installed s/w )
5.No limit User(Limited user can access the Ms os system/server)
6.Free From Virus
etc..........................

Guide to naming conventions on groupId, artifactId and version
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groupId will identify your project uniquely across all projects, so we need to enforce a naming schema. It has to follow the package name rules, what means that has to be at least as a domain name you control, and you can create as many subgroups as you want. Look at More information about package names.
eg. org.apache.maven, org.apache.commons

A good way to determine the granularity of the groupId is to use the project structure. That is, if the current project is a multiple module project, it should append a new identifier to the parent's groupId.

eg. org.apache.maven, org.apache.maven.plugins, org.apache.maven.reporting

artifactId is the name of the jar without version. If you created it then you can choose whatever name you want with lowercase letters and no strange symbols. If it's a third party jar you have to take the name of the jar as it's distributed.
eg. maven, commons-math

version if you distribute it then you can choose any typical version with numbers and dots (1.0, 1.1, 1.0.1, ...). Don't use dates as they are usually associated with SNAPSHOT (nightly) builds. If it's a third party artifact, you have to use their version number whatever it is, and as strange as it can look.
eg. 2.0, 2.0.1, 1.3.1