Java Collection Tutorial - Java ArrayDeque.peek()

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Syntax

ArrayDeque.peek() has the following syntax.

public E peek()

Example

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

//from w w w .j  a  v a 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(25);
      deque.add(2);
      deque.add(1);
      deque.add(18);        
           
      // this will retrieve head of the queue
      int retval = deque.peek();
      System.out.println("Retrieved Element is " + retval);
    
      System.out.println(deque);
   }
}

The code above generates the following result.

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