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Binary Search

In this section, we'll talk about one of the most well-known algorithms, known as the Binary Search Algorithm. 

Binary Search

So what is a searching algorithm anyway? A search algorithm is an algorithm designed to make searching for an element as efficient as possible. 


Method 1:

We can simply do an exhaustive search. Suppose our int array has elements n elements. We can use a for loop to traverse the entire array to find when 

Example: This method will add whatever element is in the parenthesis into the queue. For example, if we have an                             integer queue with elements {1,2,3,4,5}, and we write q.add(6), the new value of q is 


Method 2 (Binary Search):


This method will remove the first element in the queue. Take the example where we had 

q. = {1,2,3,4,5}. Then after we take q.remove(), we will get q={2,3,4,5}

Method 3:


This method will return the first element in the queue without adding or removing anything. For example, if we have q={1,2,3,4,5,6}, and we let int x = q.element(), then x=1.

More Methods:

Iteration:  As with any data structure, iteration is always important. How do we iterate through a queue?

Example 1:


                                               Queue<Integer> q = new LinkedList<Integer>();





                                               for(Integer item: q){




When we want to iterate over a queue, we can use an enhanced for loop, or "for-each" loop to do so. This will allow us to access all of the elements in the queue with ease.


1. Make an integer Queue, and copy the contents of the queue to another queue using loops.

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