How do I scan a .jar file?

[Tounix]

Some dude is leaking minecraft paid griefing clients but I'm not sure if they are legitimate or have a stealer. Could someone help me scan the .jar files?

 

[Lihtsaber1]

You can't,the only way to do it is decompile and look inside

 

[Tounix]

Grr. That sucks. I guess I won't be using it.

 

[Ben Hartley]

Upload it, bytecode is easy to decompiles.

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Extraction it and scan the class file