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Must be declared outside the loop

Everyone will benefit, even the Java community: Now that there's competition again, new constructs are—surprise!—again being considered for Java

Do languages have to sacrifice anything?

.NET goes much further: A routine written in a language L1 may call another routine written in a different language L2. A module in L1 may declare a variable whose type is a class declared in L2, and then call the corresponding L2 routines on that variable. If both languages are object oriented, a class in L1 can inherit from a class in L2. Exceptions triggered by a routine written in L1 and not handled on the L1 side will be passed to the caller, which—if written in L2—will process it using L2's own exception-handling mechanism. During a debugging session, you may move freely and seamlessly across modules written in L1 and L2. I don't know about you, but I've never seen anything coming even close to this level of interoperability.

design and build your application as a .NET client application, then assign the portions of the application to run on the server and the client tiers late in the development process. The compiler creates cross-browser JavaScript for the client tier, web services for the server tier, and communication, serialization, synchronization, security, and other boilerplate code to tie the tiers together.