This can happen because varargs arguments are implemented as an array, and arrays in Java don’t have the same type-specificity as generics. For instance, consider this method: public static <T ...

Understanding type compatibility is fundamental to writing good Java ... generic instantiation, which can be checked by the compiler: Note that the two swap definitions may not occur together in ...

One object type goes in, and the exact same type goes out. For a more technical discussion, you can see from the UnaryOperator JavaDoc that the component extends the Function interface and defines a ...