Java – Convert integer list to int array

See English answers > how to convert list < integer > to int [] in Java? 17

Solution

I believe you can find something in third-party libraries, but I don't believe there is content in the Java standard library

I suggest you just write a practical function to do it, unless you need many similar functions (in this case, it's worth finding relevant third-party libraries) Note that you need to address the practice of an empty reference in the list, which obviously cannot be accurately represented in the int array