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1 | public class Stack<T> { | |
2 | private int tamaño; | |
3 | private Nodo<T> inicio; | |
4 | public Stack() { | |
5 | this.tamaño=0; | |
6 | this.inicio=null; | |
7 | } | |
8 | public int size() { | |
9 | return this.tamaño; | |
10 | } | |
11 | public boolean empty() { | |
12 | return this.tamaño==0; | |
13 | } | |
14 | public void push(T valor) { | |
15 | Nodo<T>auxiliar=new Nodo<T>(valor); | |
16 | if(empty()) { | |
17 | this.inicio=auxiliar; | |
18 | this.tamaño++; | |
19 | }else { | |
20 | auxiliar.setNext(this.inicio); | |
21 | this.inicio=auxiliar; | |
22 | this.tamaño++; | |
23 | } | |
24 | ||
25 | } | |
26 | public T peek() { | |
27 | return this.inicio.getValor(); | |
28 | } | |
29 | public void pop() { | |
30 | if(!empty()) { | |
31 | this.inicio=this.inicio.getNext(); | |
32 | } | |
33 | } | |
34 | ||
35 | } |