To add element to ArrayDeque in Java
arrayDeque.add(object);
Full source
import java.util.ArrayDeque; public class Main { public static void main(String args[]) { ArrayDeque<String> adq = new ArrayDeque<String>(); /*from w w w . jav a2 s . co m*/ // Use an ArrayDeque like a stack. adq.push("CSS"); adq.push("HTML"); adq.push("Java"); adq.push("Javascript"); adq.push("SQL"); System.out.println(adq); } }