How to find the middle of an ArrayList ?
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If you have
Nitems, the middle item is usually defined as item at indexN/2(0-based).Generally, if you need to find the middle of items between index
low(inclusive) andhigh(exclusive), it’s mathematicallyint mid = (low + high) / 2. But due to arithmetic overflow in limited-precision integer, the proper formula isint mid = (low + high) >>> 1;See also