LinkedTransferQueue isEmpty() method in Java

LinkedTransferQueue contains() method in Java

Last Updated : 14 Sep, 2018

The contains() method of java.util.concurrent.LinkedTransferQueue is an in-built function in Java which returns a true boolean value if the specified element is present in this queue otherwise it returns false. Syntax:

LinkedTransferQueue.contains(Object o)

Parameters: The function accepts a single parameter o i.e. to be checked for the presence in this queue. Return Value: The function returns a Boolean value. It returns True if the specified element is present in this queue else it returns False. Below programs illustrate the LinkedTransferQueue.contains() method: Program 1:

Java

// Java Program Demonstrate contains()
// method of LinkedTransferQueue

import java.util.concurrent.*;

class LinkedTransferQueueContainsExample1 {
    public static void main(String[] args)
    {

        // Initializing the queue
        LinkedTransferQueue<Integer>
            queue = new LinkedTransferQueue<Integer>();

        // Adding elements to this queue
        for (int i = 10; i <= 15; i++)
            queue.add(i);

        // Checks if 9 is present in the queue
        if (queue.contains(9))
            System.out.println("9 is present in the queue.");
        else
            System.out.println("9 is not present in the queue.");
    }
}

Output:

9 is not present in the queue.

Program 2:

Java

// Java Program Demonstrate contains()
// method of LinkedTransferQueue */

import java.util.concurrent.*;

class LinkedTransferQueueContainsExample2 {
    public static void main(String[] args)
    {

        // Initializing the queue
        LinkedTransferQueue<String>
            queue = new LinkedTransferQueue<String>();

        // Adding elements to this queue
        queue.add("Gfg");
        queue.add("is");
        queue.add("fun");

        // Checks if Gfg is present in the queue
        if (queue.contains("Gfg"))
            System.out.println("Gfg is present in the queue.");
        else
            System.out.println("Gfg is not present in the queue.");
    }
}

Output:

Gfg is present in the queue.

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/LinkedTransferQueue.html#contains(java.lang.Object)

LinkedTransferQueue isEmpty() method in Java

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