toarray – Tarik Billa

Java List T[] toArray(T[] a) implementation

August 21, 2023 by Tarik

From the javadocs: Like the toArray() method, this method acts as bridge between array-based and collection-based APIs. Further, this method allows precise control over the runtime type of the output array, and may, under certain circumstances, be used to save allocation costs. This means that the programmer is in control over what type of array … Read more

java: (String[])List.toArray() gives ClassCastException

December 25, 2022 by Tarik

This is because when you use toArray() it returns an Object[], which can’t be cast to a String[] (even tho the contents are Strings) This is because the toArray method only gets a List and not List<String> as generics are a source code only thing, and not available at runtime and so it can’t determine … Read more