Q:

Scala program to compare two queues using equals() method

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YasminRadwan26
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2022-07-08
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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.

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YasminRadwan26
2022-07-08
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Program/Source Code:

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.

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