Generic class for collections?

Question

Java

Is there some kind of generic class or interface for any collections in java? I know Iterable and Collection, but for example, arrays cannot be cast to them (which is rather strange in my opinion).
PS Alternatively, you can still use streams, but you also need to call the corresponding method for them, but I wanted to be able to simply pass any collection (including an array) into the function. Something like IEnumerable in C#.

Answer 1

The most common one is Object. The general is nowhere. What is the real question? How to write a single function to work with any sets? No way. Only crutches when you check whether the input is Collection or Array and execute the corresponding code.
You can overload the method like this

private int someFunction(Collection<?> collection) {
        int result = 0;
        /* Do some work*/
        return result;
    }

    private int someFunction(int[] array) {
        return someFunction(Arrays.asList(array));
    }

Answer 2

there is no such. arrays separately, collections - separately.