This tutorial is aimed at introducing you to generics. You may be familiar with similar constructs from other languages, most notably C++ templates. Until now, all our examples have assumed an idealized world, where everyone is using the latest version of the Java programming language, which supports generics. When we extract an element from the list, and attempt to treat it as a string by casting it to String, we will get a ClassCastException. The exact same thing happens with the generic version of loophole(). The reason for this is, that generics are implemented by the Java compiler as a front-end conversion called erasure. You can (almost) think of it as a source-to-source translation, whereby the generic version of loophole() is converted to the on-generic version.
Tags : programming language tutorials, java programming language, source translation, generic version, classcastexception, java compiler, exact same thing, loophole, constructs, conversion, element, languages
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