How can I concatenate two arrays in Java?

Question

I need to concatenate two String arrays in Java.

void f(String[] first, String[] second) {
    String[] both = ???
}

What is t

Answer 1

How about simply

public static class Array {

    public static  T[] concat(T[]... arrays) {
        ArrayList al = new ArrayList();
        for (T[] one : arrays)
            Collections.addAll(al, one);
        return (T[]) al.toArray(arrays[0].clone());
    }
}

And just do Array.concat(arr1, arr2). As long as arr1 and arr2 are of the same type, this will give you another array of the same type containing both arrays.