import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

public class Prueba {
    static class Item implements Comparable<Item> {
        public Item(String somevalue, String somedate) throws ParseException {
            this.somevalue = somevalue;
            this.somedate = somedate;
            SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
            this.realDate = sdf.parse(somedate);
        }

        public String getSomevalue() {
            return somevalue;
        }

        public String getSomedate() {
            return somedate;
        }

        @Override
        public int compareTo(Item item) { //interfaz para ordenar.
            return realDate.compareTo(item.realDate);
        }

        @Override
        public String toString() {
            return "Item{" +
                    "somevalue='" + somevalue + '\'' +
                    ", somedate='" + somedate + '\'' +
                    '}';
        }

        private String somevalue;
        private String somedate;
        private Date realDate;

    }
    public static void main(String[] args) throws ParseException {
        Stack<Item> asStack = new Stack<>();
        asStack.push(new Item("prueba1", "24/10/2010"));
        asStack.push(new Item("prueba2", "24/10/2005"));
        asStack.push(new Item("prueba3", "24/10/2007"));
        asStack.push(new Item("prueba4", "24/10/2017"));
        asStack.push(new Item("prueba5", "24/10/2001"));

        List<Item> listToOrder = new ArrayList<>();
        while(!asStack.isEmpty()) {
            listToOrder.add(asStack.pop()); //quitamos el ultimo...
        }

        Collections.sort(listToOrder); //order by comparable...
        for(Item i: listToOrder) {
            System.out.println(i);
        }
        //los vuelves a pushear....

    }
}