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Scala program to check a queue contains a specified item

Here, we are going to learn how to check a queue contains a specified item in Scala programming language?
Submitted by Nidhi, on June 18, 2021 [Last updated : March 12, 2023]

Scala - Check if an Element is in the Queue

Here, we will create a queue using the Queue collection class and then we will check created queue contains a specified item using contains() method. The contains() method returns true if the queue contains the specified item. 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 check a queue contains a specified item

The source code to check a queue contains a specified item is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to check a queue contains 
// a specified item

import scala.collection.mutable._

object Sample {
  // Main method
  def main(args: Array[String]) {
    var queue = Queue(10, 20, 30, 40, 50);

    if (queue.contains(30))
      println("queue contains item 30");
    else
      println("queue does not contain item 30");
  }
}

Output

queue contains item 30

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 a queue queue using the Queue collection class. Then we checked the queue contains item 30 using contains() method and print the appropriate message on the console screen.

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