Java Collection Tutorial - Java ArrayDeque.peekFirst()

• Back to ArrayDeque  ↑

Syntax

ArrayDeque.peekFirst() has the following syntax.

public E peekFirst()

Example

In the following code shows how to use ArrayDeque.peekFirst() method.

/*ww w  .  j a va2  s.c om*/
import java.util.ArrayDeque;
import java.util.Deque;

public class Main {
   public static void main(String[] args) {
      
      
      Deque<Integer>  deque = new ArrayDeque<Integer> (8);

      
      deque.add(25);
      deque.add(2);
      deque.add(1);
      deque.add(18);        
           
      int retval = deque.peekFirst();
      System.out.println("Retrieved Element is " + retval);
    
      System.out.println(deque);
   }
}

The code above generates the following result.

• Back to ArrayDeque  ↑