How can I make a method take an array of any type as a parameter?

Question

I would like to be able to take in any array type as a parameter in a method.:

public void foo(Array[] array) {
    System.out.println(array.length)
}
         


        

Answer 1

Use generics.

public void foo(T[] array) {
    System.out.println(array.length);
}

This will not work for array of primitive types, such as int[], boolean[], double[],... You have to use their class wrappers instead: Integer[], Boolean[], Double[], ... or overload your method for each needed primitive type separately.