Java ConcurrentLinkedQueue offer() Method

by Online Tutorials Library July 22, 2022

Java ConcurrentLinkedQueue offer() Method

The offer() method of ConcurrentLinkedQueue class is used to add the specified element at the tail of this queue.

Syntax:

Parameters:

The parameter ‘e’ is the element that is to be added in the queue.

Specified By:

The offer() method of ConcurrentLinkedQueue class is specified by:

offer in the interface Queue<E>.

Throws:

The offer() method throws NullPointerException – if the defined element(e) holds null value.

Return Value:

The offer() method returns true on the successful insertion, otherwise returns false.

Example 1

  import java.util.concurrent.ConcurrentLinkedQueue;  public class ConcurrentLinkedQueueOfferExample1 {      public static void main(String[] args) throws InterruptedException {          ConcurrentLinkedQueue<Integer> queue = new ConcurrentLinkedQueue<Integer>();          //offer() method insert the element at the tail of queue          queue.offer(12);          queue.offer(67);          queue.offer(45);          queue.offer(123);          System.out.println(“Queue : “+queue);      }  }  

Test it Now

Output:

Queue : [12, 67, 45, 123]

Example 2

  import java.util.concurrent.ConcurrentLinkedQueue;  public class ConcurrentLinkedQueueOfferExample2 {      public static void main(String[] args) throws InterruptedException {          ConcurrentLinkedQueue<String> queue = new ConcurrentLinkedQueue<String>();          queue.add(“Reema”);          queue.add(“Rahul”);          queue.add(“Rita”);          queue.add(“Ramesh”);          //offer() method insert the element at the tail of queue          queue.offer(“Gita”);          for(String xyz:queue){              System.out.println(xyz);          }      }  }  

Test it Now

Output:

Reema  Rahul  Rita  Ramesh  Gita

Example 3

  import java.util.concurrent.ConcurrentLinkedQueue;  public class ConcurrentLinkedQueueOfferExample3 {      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”);          ConcurrentLinkedQueue<Employee1> queue = new ConcurrentLinkedQueue<Employee1>();          queue.add(employee1);          queue.add(employee2);          queue.add(employee3);          Employee1 employee4 = new Employee1(“Himanshu  “, “Bhardwaj”, “himanshubhardwaj0604@gamil.com”);          queue.offer(employee4);          for (Employee1 xyz : queue) {              System.out.println(xyz);          }      }  }  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;      }  }  

Test it Now

Output:

Reema       Panda     [email protected]  Geetanjali  Sharma    [email protected]  Vineet      Tanjea    [email protected]  Himanshu    Bhardwaj  [email protected]

Next TopicJava ConcurrentLinkedQueue

Java ConcurrentLinkedQueue offer() Method

Java ConcurrentLinkedQueue offer() Method

Syntax:

Parameters:

Specified By:

Throws:

Return Value:

Example 1

Example 2

Example 3

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