ConcurrentLinkedQueue contains() method in Java
The contains() method of ConcurrentLinkedQueue returns true if ConcurrentLinkedQueue contains the object o, passed as parameter. This method returns true if and only if this ConcurrentLinkedQueue contains at least one element e which is equal to object o passed as parameter i.e. o.equals(e).
Syntax:
public boolean contains(Object o)
Parameter: This method takes a single parameter O which represents object to check whether ConcurrentLinkedQueue contains the specified object.
Returns: This method returns true if this ConcurrentLinkedQueue contains the object.
Below programs illustrate contains() method of ConcurrentLinkedQueue:
Example 1:
import java.util.concurrent.*;
public class GFG {
public static void main(String[] args)
{
ConcurrentLinkedQueue<String>
queue = new ConcurrentLinkedQueue<String>();
queue.add( "Aman" );
queue.add( "Amar" );
queue.add( "Sanjeet" );
queue.add( "Rabi" );
System.out.println( "ConcurrentLinkedQueue: " + queue);
boolean response1 = queue.contains( "Aman" );
System.out.println( "queue contains String \"Aman\" : "
+ response1);
boolean response2 = queue.contains( "Ram" );
System.out.println( "queue contains String \"Ram\" : "
+ response2);
}
}
|
Output:
ConcurrentLinkedQueue: [Aman, Amar, Sanjeet, Rabi]
queue contains String "Aman" : true
queue contains String "Ram" : false
Example 2:
import java.util.concurrent.*;
public class GFG {
public static void main(String[] args)
{
ConcurrentLinkedQueue<Integer>
queue = new ConcurrentLinkedQueue<Integer>();
queue.add( 4353 );
queue.add( 7824 );
queue.add( 78249 );
queue.add( 8724 );
System.out.println( "ConcurrentLinkedQueue: " + queue);
boolean response1 = queue.contains( 78249 );
System.out.println( "queue contains Number 78249 : "
+ response1);
boolean response2 = queue.contains( 9876 );
System.out.println( "queue contains Number 9876: "
+ response2);
}
}
|
Output:
ConcurrentLinkedQueue: [4353, 7824, 78249, 8724]
queue contains Number 78249 : true
queue contains Number 9876: false
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentLinkedQueue.html#contains-java.lang.Object-
Last Updated :
26 Nov, 2018
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