Java Collection Tutorial - Java ArrayDeque.isEmpty()

• Back to ArrayDeque  ↑

Syntax

ArrayDeque.isEmpty() has the following syntax.

public boolean isEmpty()

Example

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

// w  w w.  j a  v  a2 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);        
           
      boolean retval = deque.isEmpty();
      if (retval == true) {
         System.out.println("deque is empty");
       }
      else {
         System.out.println("deque is not empty");
       }
     
      System.out.println(deque);
   }
}

The code above generates the following result.

• Back to ArrayDeque  ↑