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How the exact type of object is being returned even though Type Erasure has reduced T to Object


It is all compiler's trickery: since the complier knows that MyGeneric's type parameter is TestGen, it quietly inserts a type cast behind the scene. If you decompile the call back from bytecode, it would look something like this:

TestGen tg = (TestGen)mg.returnObj();

The compiler has verified that the call is going to succeed at runtime.


Categories : Java

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