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DelayQueue remove() method in Java
  • Last Updated : 23 Dec, 2018

The remove() method of DelayQueue class in Java is used to remove a single instance of the given object say obj from this DelayQueue if it is present. It returns true if the given element is removed successfully otherwise it returns false.


public boolean remove(Object obj)

Parameters: This method takes a single object obj as parameter which is to be removed from this DealyQueue.

Return Value: It returns a boolean value which is true if the element has been successfully deleted otherwise it returns false.

Below program illustrate the remove() method of DelayQueue in Java:

// Java Program to illustrate the remove method
// of DelayQueue class
import java.util.concurrent.DelayQueue;
import java.util.concurrent.Delayed;
import java.util.concurrent.TimeUnit;
public class GFG {
    public static void main(String args[])
        // Create a DelayQueue instance
        DelayQueue<Delayed> queue = new DelayQueue<Delayed>();
        // Create an object of type Delayed
        Delayed ob = new Delayed() {
            public long getDelay(TimeUnit unit)
                return 24; // some value is returned
            public int compareTo(Delayed o)
                if (o.getDelay(TimeUnit.DAYS) > 
                    return 1;
                else if (o.getDelay(TimeUnit.DAYS) == 
                    return 0;
                return -1;
        // Add the object to DelayQueue
        // Print initial size of Queue
        System.out.println("Initial Size : "
                           + queue.size());
        // Remove the object ob from
        // this DelayQueue
        // Print the final size of the DelayQueue
        System.out.println("Size after removing : "
                           + queue.size());
Initial Size : 1
Size after removing : 0

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