ConcurrentLinkedQueue remove() method in Java

The remove(Object o) method of ConcurrentLinkedQueue is used to remove a single instance of the specified element from this ConcurrentLinkedQueue, if it is present. This method removes an element e such that o.equals(e) if this ConcurrentLinkedQueue contains one or more such elements. Remove() method returns true if this ConcurrentLinkedQueue contained the specified element else it will return false.

Syntax:

public boolean remove(Object o)

Parameter: This method takes a parameter o which represent element to be removed from this ConcurrentLinkedQueue.

Returns: This method returns true if this ConcurrentLinkedQueue contained the specified element and removed.

Below programs illustrate remove() method of ConcurrentLinkedQueue:

Example 1:

// Java Program Demonstrate remove() 
// method of ConcurrentLinkedQueue 
  
import java.util.concurrent.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create an ConcurrentLinkedQueue 
        ConcurrentLinkedQueue<Integer> 
            queue = new ConcurrentLinkedQueue<Integer>(); 
  
        // Add Numbers to queue 
        queue.add(4353); 
        queue.add(7824); 
        queue.add(78249); 
        queue.add(8724); 
  
        // Displaying the existing ConcurrentLinkedQueue 
        System.out.println("ConcurrentLinkedQueue: " + queue); 
  
        // apply remove() for Number 78249 
        boolean response = queue.remove(78249); 
  
        // print results 
        System.out.println("Removing Number 78249 successful: " + response); 
  
        // Displaying the existing ConcurrentLinkedQueue 
        System.out.println("Updated ConcurrentLinkedQueue: " + queue); 
    } 
} 

Output:

ConcurrentLinkedQueue: [4353, 7824, 78249, 8724]
Removing Number 78249 successful: true
Updated ConcurrentLinkedQueue: [4353, 7824, 8724]

Example 2:

// Java Program Demonstrate remove() 
// method of ConcurrentLinkedQueue 
  
import java.util.concurrent.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create an ConcurrentLinkedQueue 
        ConcurrentLinkedQueue<String> 
            queue = new ConcurrentLinkedQueue<String>(); 
  
        // Add String to queue 
        queue.add("Aman"); 
        queue.add("Amar"); 
        queue.add("Sanjeet"); 
        queue.add("Rabi"); 
  
        // Displaying the existing ConcurrentLinkedQueue 
        System.out.println("ConcurrentLinkedQueue: " + queue); 
  
        // apply remove() on queue 
        boolean response1 = queue.remove("Aman"); 
  
        // print after applying poll method 
        System.out.println("Removing String \"Aman\" successful: " + response1); 
  
        // Displaying the existing ConcurrentLinkedQueue 
        System.out.println("Updated ConcurrentLinkedQueue: " + queue); 
  
        // apply remove() on queue 
        boolean response2 = queue.remove("Kisan"); 
  
        // print after applying poll method 
        System.out.println("Removing String \"Kisan\" successful: " + response2); 
  
        // Displaying the existing ConcurrentLinkedQueue 
        System.out.println("Updated ConcurrentLinkedQueue: " + queue); 
    } 
} 

Output:

ConcurrentLinkedQueue: [Aman, Amar, Sanjeet, Rabi]
Removing String "Aman" successful: true
Updated ConcurrentLinkedQueue: [Amar, Sanjeet, Rabi]
Removing String "Kisan" successful: false
Updated ConcurrentLinkedQueue: [Amar, Sanjeet, Rabi]

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentLinkedQueue.html#remove-java.lang.Object-

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