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PriorityQueue remove() Method in Java
  • Difficulty Level : Medium
  • Last Updated : 10 Dec, 2018
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The Java.util.PriorityQueue.remove() method is used to remove a particular element from a PriorityQueue.

Syntax:

Priority_Queue.remove(Object O)

Parameters: The parameter O is of the type of PriorityQueue and specifies the element to be removed from the PriorityQueue.

Return Value: This method returns True if the specified element is present in the Queue else it returns False.

Below programs illustrate the Java.util.PriorityQueue.remove() method:






// Java code to illustrate remove()
import java.util.*;
  
public class PriorityQueueDemo {
    public static void main(String args[])
    {
        // Creating an empty PriorityQueue
        PriorityQueue<String> queue = new PriorityQueue<String>();
  
        // Use add() method to add elements into the Queue
        queue.add("Welcome");
        queue.add("To");
        queue.add("Geeks");
        queue.add("For");
        queue.add("Geeks");
  
        // Displaying the PriorityQueue
        System.out.println("Initial PriorityQueue: " + queue);
  
        // Removing elements using remove() method
        queue.remove("Geeks");
        queue.remove("For");
        queue.remove("Welcome");
  
        // Displaying the PriorityQueue after removal
        System.out.println("PriorityQueue after removing "
                           + "elements: " + queue);
    }
}
Output:
Initial PriorityQueue: [For, Geeks, To, Welcome, Geeks]
PriorityQueue after removing elements: [Geeks, To]

Program 2:




// Java code to illustrate remove()
import java.util.*;
  
public class PriorityQueueDemo {
    public static void main(String args[])
    {
        // Creating an empty PriorityQueue
        PriorityQueue<Integer> queue = new PriorityQueue<Integer>();
  
        // Use add() method to add elements into the Queue
        queue.add(10);
        queue.add(15);
        queue.add(30);
        queue.add(20);
        queue.add(5);
  
        // Displaying the PriorityQueue
        System.out.println("Initial PriorityQueue: " + queue);
  
        // Removing elements using remove() method
        queue.remove(30);
        queue.remove(5);
  
        // Displaying the PriorityQueue after removal
        System.out.println("PriorityQueue after removing "
                           + "elements: " + queue);
    }
}
Output:
Initial PriorityQueue: [5, 10, 30, 20, 15]
PriorityQueue after removing elements: [10, 20, 15]

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