RetroSearch Browse

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.geeksforgeeks.org/java/concurrentlinkeddeque-addlast-method-in-java/ below:

ConcurrentLinkedDeque addLast() method in Java

Last Updated : 17 Sep, 2018

The

java.util.concurrent.ConcurrentLinkedDeque.addLast()

is an in-built function in Java which inserts the specified element to the end of the deque.

Syntax:

conn_linked_deque.addLast(elem)

Parameter:

The method accepts only a single parameter

elem

which is to be added to the end of the ConcurrentLinkedDeque.

Return Value:

The function has no return value.

Exception:

The method will throw

NullPointerException

when the parameter passed to the function is

null

. Due to its bounded nature, this method will never throw

IllegalStateException

or return false. Below programs illustrate the use of

java.util.concurrent.ConcurrentLinkedDeque.addLast()

method:

Program 1:

This program involves a ConcurrentLinkedDeque of Integer type.

Java


 // Java Program Demonstrate addLast()
// method of ConcurrentLinkedDeque 

import java.util.concurrent.*;
class ConcurrentLinkedDequeDemo {
    public static void main(String[] args)
    {
        ConcurrentLinkedDeque<Integer> cld = 
                      new ConcurrentLinkedDeque<Integer>();
        cld.addLast(12);
        cld.addLast(110);
        cld.addLast(55);
        cld.addLast(76);

        // Displaying the existing LinkedDeque
        System.out.println("Initial Elements in"
                           + "the LinkedDeque: " + cld);

        // Insert a new element in the  LinkedDeque
        cld.addLast(21);

        // Displaying the modified LinkedDeque
        System.out.println("Initial Elements in"
                           + "the LinkedDeque: " + cld);
    }
}

Output:

Initial Elements inthe LinkedDeque: [12, 110, 55, 76]
Initial Elements inthe LinkedDeque: [12, 110, 55, 76, 21]

Program 2:

This program involves a ConcurrentLinkedDeque of Integer type with Exception Handling when

null

is passed as parameter to the function.

Java


 // Java Program Demonstrate addLast()
// method of ConcurrentLinkedDeque 

import java.util.concurrent.*;

class ConcurrentLinkedDequeDemo {
    public static void main(String[] args)
    {
        ConcurrentLinkedDeque<String> cld = 
                        new ConcurrentLinkedDeque<String>();

        cld.addLast("Geeks");
        cld.addLast("Geek");
        cld.addLast("Gfg");
        cld.addLast("Contribute");

        // Displaying the existing LinkedDeque
        System.out.println("Initial Elements in"
                           + "the LinkedDeque: " + cld);

        /* Exception thrown when null 
             is passed as parameter*/
        try {
            cld.addLast(null);
        }
        catch (NullPointerException e) {
            System.out.println("NullPointerException"
                               + "thrown");
        }

        // Insert a new element in the  LinkedDeque
        cld.addLast("Sudo Placement");

        // Displaying the modified LinkedDeque
        System.out.println("Initial Elements in"
                           + "the LinkedDeque: " + cld);
    }
}

Output:

Initial Elements inthe LinkedDeque: [Geeks, Geek, Gfg, Contribute]
NullPointerExceptionthrown
Initial Elements inthe LinkedDeque: [Geeks, Geek, Gfg, Contribute, Sudo Placement]

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ConcurrentLinkedDeque.html#addLast()

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4