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Java PriorityQueue contains() Method with Example

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

PriorityQueue Class contains() method

• contains() method is available in java.util package.
• contains() method is to check whether the given object (ob) exists or not in this PriorityQueue.
• contains() 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.
• contains() method does not throw an exception at the time of checking the existence of the given object (ob).

Syntax:

    public boolean contains(Object ob);

Parameter(s):

• Object ob – represents the object to be tested for its existence in this PriorityQueue.

Return value:

The return type of the method is boolean, it returns true when the given object exists otherwise it returns false.

Example:

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

import java.util.*;
public class ContainsOfPriorityQueue {
    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");

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

        // By using contains() method is to
        // to check whether the given object
        // exists or not in this PriorityQueue
        boolean status = pq.contains("JAVA");

        // Display Status of PriorityQueue
        System.out.println("pq.contains(JAVA): " + status);
    }
}

Output

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