The java.util.concurrent.ConcurrentLinkedDeque.isEmpty() is an in-built function in Java which checks whether the deque contains elements or not.
Syntax:
public boolean isEmpty()
Parameters: The function does not accepts any parameter.
Return: This method returns a boolean value stating whether this deque is empty or not.
Below programs illustrate the ConcurrentLinkedDeque.isEmpty() method:
Example: 1
// Java Program Demonstrate // isEmpty() method of ConcurrentLinkedDeque import java.util.concurrent.*;
class ConcurrentLinkedDequeDemo {
public static void main(String[] args)
{
ConcurrentLinkedDeque<String> cld
= new ConcurrentLinkedDeque<String>();
// Displaying the existing LinkedDeque
System.out.println( "ConcurrentLinkedDeque: "
+ cld);
// Check if the queue is empty
// using isEmpty() method
System.out.println( "Is deque empty: "
+ cld.isEmpty());
}
} |
Output:
ConcurrentLinkedDeque: [] Is deque empty: true
Example: 2
// Java Program Demonstrate // isEmpty() method of ConcurrentLinkedDeque import java.util.concurrent.*;
class ConcurrentLinkedDequeDemo {
public static void main(String[] args)
{
ConcurrentLinkedDeque<String> cld
= new ConcurrentLinkedDeque<String>();
cld.add( "GFG" );
cld.add( "Gfg" );
cld.add( "GeeksforGeeks" );
cld.add( "Geeks" );
// Displaying the existing LinkedDeque
System.out.println( "ConcurrentLinkedDeque: "
+ cld);
// Check if the queue is empty
// using isEmpty() method
System.out.println( "Is deque empty: "
+ cld.isEmpty());
}
} |
Output:
ConcurrentLinkedDeque: [GFG, Gfg, GeeksforGeeks, Geeks] Is deque empty: false