Java Collection Tutorial - Java Deque.removeFirst()

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Syntax

Deque.removeFirst() has the following syntax.

E removeFirst()

Example

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

import java.util.ArrayDeque;
import java.util.Deque;
/*from   ww w. ja v a2 s . c  o m*/
public class Main {
   public static void main(String[] args) {
      
       
      Deque<Integer>  deque = new ArrayDeque<Integer> (8);

      
      deque.add(15);
      deque.add(30);
      deque.add(25);
      deque.add(40);

      // this will remove element at the first(head) postion
      int retval = deque.removeFirst();
      System.out.println("Element removed is: " + retval);

      System.out.println(deque);
   }
}

The code above generates the following result.

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