Queues
In the world of software development, there are various data structures that are used to organize and manipulate data. One such data structure is the queue.
A queue is a linear data structure that follows the First-In-First-Out (FIFO) principle. It can be visualized as a line of people waiting for a bus. The first person to join the line is the first one to board the bus, and any new person joining the line goes to the end.
Similarly, in a queue, new elements are added to the rear end, and existing elements are removed from the front end. This makes a queue a perfect choice when you want to process data in the same order it arrives.
In Java, you can use the Queue interface from the java.util package to work with queues. Here's an example:
TEXT/X-JAVA
1import java.util.LinkedList;
2import java.util.Queue;
3
4public class Main {
5 public static void main(String[] args) {
6 Queue<String> queue = new LinkedList<>();
7
8 // Add elements to the queue
9 queue.add("apple");
10 queue.add("banana");
11 queue.add("cherry");
12
13 // Get the front element
14 String frontElement = queue.peek();
15 System.out.println("The front element is: " + frontElement);
16
17 // Remove elements from the queue
18 String removedElement = queue.poll();
19 System.out.println("Removed element: " + removedElement);
20
21 // Check if the queue is empty
22 boolean isEmpty = queue.isEmpty();
23 System.out.println("Is the queue empty? " + isEmpty);
24 }
25}