Java LinkedBlockingDeque pop() Method

The pop() method of LinkedBlockingDeque class returns the first element of this deque, and also removes it. The result returned by pop() method is similar to that returned by Deque.removeFirst().

Syntax:

Parameters:

Specified By:

The pop() method of LinkedBlockingDeque class is specified by pop() method in interface Deque<E>.

Return Value:

The pop() method returns the foremost element of this deque.

Throws:

The pop() method throws NoSuchElementException if this deque is empty.

Example 1

import java.util.concurrent.LinkedBlockingDeque;
public class LinkedBlockingDequePopExample1 {
public static void main(String[] args) {
int capacity=100;
LinkedBlockingDeque<String>deque = new LinkedBlockingDeque<String>(capacity);
deque.add("Himanshu");
deque.add("Rahul");
deque.add("Rita");
deque.add("Ramesh");
//retrieves and removes First element of the stack
String val = deque.pop();
System.out.println("First element of the deque is : "+val);
System.out.println("Elements left in deque : "+deque);
    }
}

Test it Now

Output:

First element of the dequeis :Himanshu
Elements left in deque : [Rahul, Rita, Ramesh]

Example 2

import java.util.concurrent.LinkedBlockingDeque;
public class LinkedBlockingDequePopExample2 {
public static void main(String[] args) throws InterruptedException {
int capacity = 5;
LinkedBlockingDeque<Integer> queue = new LinkedBlockingDeque<Integer>(capacity);
int val=queue.pop();
System.out.println("Head of queue : "+val);
System.out.println("Elements in queue : "+queue);
    }
}

Test it Now

Output:

Exception in thread "main" java.util.NoSuchElementException
	at java.util.concurrent.LinkedBlockingDeque.removeFirst(LinkedBlockingDeque.java:453)
	at java.util.concurrent.LinkedBlockingDeque.pop(LinkedBlockingDeque.java:777)
	at com.javaTpoint.LinkedBlockingDequePopExample2.main(LinkedBlockingDequePopExample2.java:9)

Example 3

import java.util.concurrent.LinkedBlockingDeque;
class Employee1{
private String f_name;
private String l_name;
private String email;
public Employee1(String f_name, String l_name, String email) {
this.f_name= f_name;
this.l_name= l_name;
this.email= email;
    }
public String toString(){
return f_name+"  " +l_name+"  "+email;
    }
}
public class LinkedBlockingDequePopExample3 {
public static void main(String[] args) {
        Employee1 employee1 = new Employee1("Reema     ", "Panda   ", "reemapanda18@gamil.com");
        Employee1 employee2 = new Employee1("Geetanjali", "Sharma  ", "geetanjaliSharma28@gamil.com");
        Employee1 employee3 = new Employee1("Vineet    ", "Tanjea  ", "VineetTanjea56@gamil.com");
        Employee1 employee4 = new Employee1("Himanshu  ", "Bhardwaj", "himanshubhardwaj0604@gamil.com");
int capacity=100;
LinkedBlockingDeque<Employee1>deque = new LinkedBlockingDeque<Employee1>(capacity);
deque.add(employee1);
deque.add(employee2);
deque.add(employee3);
deque.add(employee4);
for (Employee1 xyz : deque) {
System.out.println(deque.pop());
        }
    }
}

Test it Now

Output:

Reema       Panda     [email protected]
Geetanjali  Sharma    [email protected]
VineetTanjea    [email protected]
HimanshuBhardwaj  [email protected]

Next TopicJava LinkedBlockingDeque

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Java LinkedBlockingDeque pop() Method

Syntax:

Parameters:

Specified By:

Return Value:

Throws:

Example 1

Example 2

Example 3