In this code, an ArrayDeque named deque is created, and the integers 1 and 2 are added to it using the offer method. The offer method inserts the specified element at the end of the deque.
State of deque after offers:[1, 2]
The peek method retrieves, but does not remove, the head of the deque, returning 1. Therefore, i1 is assigned the value 1.
State of deque after peek:[1, 2]
Value of i1:1
The poll method retrieves and removes the head of the deque, returning 1. Therefore, i2 is assigned the value 1.
Another peek operation retrieves the current head of the deque, which is now 2, without removing it. Therefore, i3 is assigned the value 2.
The System.out.println statement then outputs the values of i1, i2, and i3, resulting in 1 1 2.
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