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As a result ArrayList is slower than LinkedList and the latter is preferred in case you need to perform insert and delete operations in the middle of a collection.LinkedList worked 200 times faster than ArrayList when 0.1 million elements were inserted at the start of the collection.
An ArrayList with a size of 2 has valid indices in the interval [0, 1]. The exception is thrown because we requested for an invalid index. So, if we want to access the 2nd element of the list, we must write:list.get(1); because the 1st element of a List, as with arrays, starts at index 0.