Java LinkedBlockingDeque addLast() method

The addLast() method of LinkedBlockingDeque class adds the specified elements at the end of this deque, without exceeding the capacity.

Syntax:

Parameters:

e - this is the element to be added.

Specified By:

The addLast() method of LinkedBlockingDeque class is specified by :

addLast() in interface BlockingDeque<E>.
addLast() in interface Deque<E>.

Throws:

The add() method throws:

NullPointerException - if the specified element e, is null.

IllegalStateException - if this deque is full

Example 1

import java.util.concurrent.LinkedBlockingDeque;
public class LinkedBlockingDequeAddLastExample1 {
    public static void main(String[] args) {
        int capacity=100;
        LinkedBlockingDeque<Integer> deque = new LinkedBlockingDeque<Integer>(capacity);
        for (int i = 1; i <=5; i++) {
            //  Adding items to the tail of this queue
            deque.add(i);
        }
        System.out.println(deque);
        System.out.println("After inserting 10 at Last position");
        deque.addLast(10);
        System.out.println(deque);
    }
}

Test it Now

Output:

[1, 2, 3, 4, 5]
After inserting 10 at Last position
[1, 2, 3, 4, 5, 10]

Example 2

import java.util.concurrent.LinkedBlockingDeque;
public class LinkedBlockingDequeAddLastExample2 {
    static  int i=1;
    public static void main(String[] args) {
        int capacity=100;
        LinkedBlockingDeque<String> deque = new LinkedBlockingDeque<String>(capacity);
        deque.add("Disha");
        deque.add("Tanmay");
        deque.add("Prachi");
        deque.add("Garvit");
        for (String xyz : deque){
            System.out.println(i++ +". "+xyz);
        }int i=1;
        System.out.println("After adding string at last position :");
        deque.addLast("Diya");
        for (String xyz : deque){
            System.out.println(i++ +". "+xyz);
        }
    }
}

Test it Now

Output:

1. Disha
2. Tanmay
3. Prachi
4. Garvit
After adding string at last position :
1. Disha
2. Tanmay
3. Prachi
4. Garvit
5. Diya

Example 3

import java.util.concurrent.LinkedBlockingDeque;
public class LinkedBlockingDequeAddLastExample3 {
    public static void main(String[] args) {
        int capacity=4;
        LinkedBlockingDeque<String> deque = new LinkedBlockingDeque<String>(capacity);
        deque.add("Disha");
        deque.add("Tanmay");
        deque.add("Prachi");
        deque.add("Garvit");
        deque.addFirst("Dia");
        System.out.println("Deque : "+deque);
    }
}

Test it Now

Output:

Exception in thread "main" java.lang.IllegalStateException: Deque full
	at java.util.concurrent.LinkedBlockingDeque.addFirst(LinkedBlockingDeque.java:326)
	at com.javaTpoint.LinkedBlockingDequeAddLastExample3.main(LinkedBlockingDequeAddLastExample3.java:12)

Example 4

import java.util.concurrent.LinkedBlockingDeque;
public class LinkedBlockingDequeAddLastExample4 {
    public static void main(String[] args) {
        int capacity=4;
        LinkedBlockingDeque<String> deque = new LinkedBlockingDeque<String>(capacity);
        deque.add("Disha");
        deque.add("Tanmay");
        deque.add("Prachi");
        deque.addLast(null);
        System.out.println("Deque : "+deque);
    }
}

Test it Now

Output:

Exception in thread "main" java.lang.NullPointerException
	at java.util.concurrent.LinkedBlockingDeque.offerLast(LinkedBlockingDeque.java:357)
	at java.util.concurrent.LinkedBlockingDeque.addLast(LinkedBlockingDeque.java:334)
	at com.javaTpoint.LinkedBlockingDequeAddLastExample4.main(LinkedBlockingDequeAddLastExample4.java:11)
dr

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