Java Collection Tutorial - Java ArrayDeque.getFirst()

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Syntax

ArrayDeque.getFirst() has the following syntax.

public E getFirst()

Example

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

// w  ww .j a va 2 s. c  o m
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(3);
      deque.add(2);
      deque.add(1);
      deque.add(18);        
           
      System.out.println(deque);
      
      // getFirst() will retrieve element at first(head) position
      int retval = deque.getFirst();
      System.out.println("Retrieved Element is = " + retval);
   }
}

The code above generates the following result.

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