Welcome! Today, I am thrilled to guide you through a fascinating task involving ArrayLists in Java: pairing up 'opposite' elements. Specifically, we're going to learn how to access and manipulate elements within a Java ArrayList. The task at hand provides an excellent opportunity to elevate your ArrayList-handling skills within the Java language. Are you ready to get started? Let's dive right in!

Our task today is to form pairs of 'opposite' elements in a given ArrayList of integers. In an ArrayList consisting of n elements, the first and last elements are known as 'opposite', the second element and the second last element are considered 'opposite', and so on. For an ArrayList with an odd length, the middle element is its own 'opposite'.

You will be provided with an ArrayList of n integers. The value of n could range from 1 to 100, inclusive. The task will require you to return an ArrayList of String objects. Each String will consist of an element and its 'opposite' element joined by a space.