BlockingDeque element() method in java with examples
Last Updated :
25 Jan, 2021
The element() method of BlockingDeque returns the element at the front the container. It does not delete the element in the container. This method returns the head of the queue represented by this deque.
Syntax:
public void element()
Parameters: This method does not accept any parameter.
Returns: This method returns the head of the queue represented by this deque.
Note: The element() method of BlockingDeque has been inherited from the LinkedBlockingDeque class in Java.
Below programs illustrate element() method of BlockingDeque:
Program 1:
Java
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.BlockingDeque;
import java.util.*;
public class GFG {
public static void main(String[] args)
throws IllegalStateException
{
BlockingDeque<Integer> BD
= new LinkedBlockingDeque<Integer>();
BD.add( 10 );
BD.add( 20 );
BD.add( 30 );
BD.add( 40 );
System.out.println( "Blocking Deque: " + BD);
System.out.println( "Blocking Deque front element: " + BD.element());
}
}
|
Output:
Blocking Deque: [10, 20, 30, 40]
Blocking Deque front element: 10
Program 2:
Java
import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;
import java.util.concurrent.BlockingDeque;
public class GFG {
public static void main(String[] args)
throws IllegalStateException
{
BlockingDeque<String> BD
= new LinkedBlockingDeque<String>();
BD.add( "ab" );
BD.add( "cd" );
BD.add( "fg" );
BD.add( "xz" );
System.out.println( "Blocking Deque: " + BD);
System.out.println( "Blocking Deque front element: " + BD.element());
}
}
|
Output:
Blocking Deque: [ab, cd, fg, xz]
Blocking Deque front element: ab
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/BlockingDeque.html#element()
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