Home » Java programming language

Java PriorityQueue remove() Method with Example

PriorityQueue Class remove() method: Here, we are going to learn about the remove() method of PriorityQueue Class with its syntax and example.
Submitted by Preeti Jain, on March 11, 2020

PriorityQueue Class remove() method

• remove() method is available in java.util package.
• remove() method is used to remove one instance of the given object from this PriorityQueue when exists.
• remove() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• remove() method does not throw an exception at the time of removing an object.

Syntax:

    public boolean remove(Object ob);

Parameter(s):

• Object ob – represents the element (ele) to be remove from this PriorityQueue.

Return value:

The return type of the method is boolean, it returns true when the given element is to be removed successfully otherwise it returns false.

Example:

// Java program to demonstrate the example 
// of boolean remove(Object ob) method of 
// PriorityQueue

import java.util.*;

public class RemoveOfPriorityQueue {
    public static void main(String args[]) {
        // Instantiate PriorityQueue
        PriorityQueue < String > pq = new PriorityQueue < String > ();

        // By using add() method is add
        // the given element into priority
        // queue
        pq.add("C");
        pq.add("C++");
        pq.add("JAVA");
        pq.add("PHP");
        pq.add("ANDROID");
        pq.add("JAVA");

        // Display PriorityQueue
        System.out.println("PriorityQueue: " + pq);

        // By using remove(object) method is to
        // remove the single instance of given element
        // from this PriorityQueue
        Object ele = pq.remove("JAVA");

        // Display removed element
        System.out.println("pq.remove(JAVA): " + ele);

        // Display PriorityQueue
        System.out.println("PriorityQueue: " + pq);
    }
}

Output

PriorityQueue: [ANDROID, C, JAVA, PHP, C++, JAVA]
pq.remove(JAVA): true
PriorityQueue: [ANDROID, C, JAVA, PHP, C++]