Check out example codes for "arraylist remove method java". It will help you in understanding the concepts better.

Code Example 1

//Create the ArrayList
List<Integer> al = new ArrayList<>(); 
//Add the items
al.add(10);
al.add(18);
//Remove item(1 = 2nd item in list)
al.remove(1); 
>> [10]

Code Example 2

public E remove(int index)	// returns removed element at index

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