java.util.PriorityQueue.remove() Method

Description

The remove(Object o) method is used to remove a single instance of the specified element from this queue, if it is present.

Declaration

Following is the declaration for java.util.PriorityQueue.remove() method.

public boolean remove(Object o)

Parameters

• o--The element to be removed from this queue.

Return Value

• The method call returns 'true' if this queue changed as a result of the call.

Exception

• NA

Example

The following example shows the usage of java.util.PriorityQueue.remove()

package com.tutorialspoint;

import java.util.*;

public class PriorityQueueDemo {
   public static void main(String args[]) {
      // create priority queue
      PriorityQueue < Integer >  prq = new PriorityQueue < Integer > (); 
       
      // insert values in the queue
      for ( int i = 3; i  <  10; i++ ){  
         prq.add (new Integer (i)) ; 
      }
      
      System.out.println ( "Initial priority queue values are: "+ prq);
      
      // remove 7 from the queue
      boolean isremoved = prq.remove(7);
      
      System.out.println ( "Return value after remove: "+ isremoved);
      
      System.out.println ( "Priority queue values after remove: "+ prq);
   }
}

Let us compile and run the above program, this will produce the following result.

Initial priority queue values are: [3, 4, 5, 6, 7, 8, 9]
Return value after remove: true
Priority queue values after remove: [3, 4, 5, 6, 9, 8]