StackSLL

public class StackSLL <ELEMENT> {

    SimpleLinkedList<ELEMENT> lista = new SimpleLinkedList<ELEMENT>();

    public StackSLL() {

    }

    public StackSLL(SimpleLinkedList<ELEMENT> lista) {
        super();
        this.lista = lista;
    }

    public boolean empty() {
         return this.lista.size() <= 0;
     }

    public ELEMENT peek() {
         if (this.empty()) {
             throw new RuntimeException("La pila está vacía...");
         }
         return this.lista.element();
     }

    public ELEMENT pop() {
         if (this.empty()) {
             throw new RuntimeException("La pila está vacía...");
         }
         return this.lista.removeFirst();
     }

    public ELEMENT push(ELEMENT element) {
        lista.addFirst(element);

        return this.lista.element();
    }

    public boolean search(Object object) {

         return lista.search(object);
     }

    public int size() {

         return this.lista.size();
     }

    public String toString() {

        return this.lista.toString();
    }

}