Java Collection Tutorial - Java Deque.getFirst()

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Syntax

Deque.getFirst() has the following syntax.

E getFirst()

Example

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

//from w ww  .  j  a va2s . 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(15);
      deque.add(30);
      deque.add(20);
      deque.add(18);        
           
      System.out.println(deque);
      
      int retval = deque.getFirst();
      System.out.println("Retrieved Element is = " + retval);
   }
}

The code above generates the following result.

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