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You have heard of Java, right?
Java is just Java, while .NET gives you C#, VB.NET (ick), IronPython, IronRuby, F#, RPL, Boo, and Nermle to name a few. While there are a small number of languages that target java bytecode (groovy for one), it's nowhere near as many as .NET.
You best look up the number of languages supported by the JVM... Not only are "common" scripting languages like python and ruby supported, but also "new" languages like groovy and scala are making headway.