Why does `List.toArray()` throw a `ClassCastException` when used with a `List`?

Java: (String[])List.toArray() Gives ClassCastException

When using List.toArray() with a list of strings, one might expect to receive an array of strings. However, this can often result in a ClassCastException.

This occurs because toArray() returns an Object[], not a String[]. This is because generics are not available at runtime. When a list is created as List, it is stored as a List. At runtime, there is no information about the type of objects in the list. Thus, toArray() must return an Object[].

To obtain a String[] from a list of strings, use toArray(new String[v2.size()]). This will allocate a String[] of the appropriate size and populate it with the strings from the list.

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