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

It could be possible using Generics.

I you don't know about it I recommend you to read about it in the documentation. http://docs.oracle.com/javase/tutorial/java/generics/index.html

Generics works with Objects so I think you can't pass a String[] and a int[] in the same method. Use Integer[] instead.

Here is the code I would use:

public static  int  length(K[] array){
    return array.length;
}

Also this could work:

public static int  length(Object[] array){
    return array.length;
}

But it won't allow you to use a specific type of Object instead of Object class.

I'm quite new in this, maybe there is a better solution, but it's the only I know!