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Scala program to compare two queues using equals() method

Here, we are going to learn how to compare two queues using equals() method in Scala programming language?
Submitted by Nidhi, on June 17, 2021 [Last updated : March 12, 2023]

Scala - Comparing Two Queues

Here, we will create three queues using the Queue collection class and compare queues using the equals() method. The equals() method returns true if queues are equal otherwise it returns false.

The Queue is a linear data structure, It follows the First In First Out (FIFO) property. We can insert and remove the item in the queue from different ends of the queue.

Scala code to compare two queues using equals() method

The source code to compare two queues using the equals() method is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to compare two queues using
// the equals() method

import scala.collection.mutable._

object Sample {
  // Main method
  def main(args: Array[String]) {
    var queue1 = Queue(10, 20, 30, 40, 50);
    var queue2 = Queue(11, 22, 33, 44, 55);
    var queue3 = Queue(10, 20, 30, 40, 50);

    if (queue1.equals(queue2))
      println("queue1 and queue2 are equal");
    else
      println("queue1 and queue2 are not equal");

    if (queue1.equals(queue3))
      println("queue1 and queue3 are equal");
    else
      println("queue1 and queue3 are not equal");
  }
}

Output

queue1 and queue2 are not equal
queue1 and queue3 are equal

Explanation

Here, we used an object-oriented approach to create the program. And, we imported Collection classes using the below statement,

import scala.collection.mutable._

And, we also created a singleton object Sample and defined the main() function. The main() function is the entry point for the program.

In the main() function, we created three queues queue1, queue2, queue3 using Queue collection class. Then compared queues using equals() method and print appropriate messages on the console screen.

Scala Queue Programs »

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