package com.zhaogd.collection.stack;
import com.zhaogd.collection.linkedlist.LinkedList;
public class Stack {
private LinkedList elementData = new LinkedList();
public void push(Object o) {
elementData.addLast(o);
}
public Object pop() {
return elementData.removeLast();
}
public Object peek() {
return elementData.getLast();
}
public boolean isEmpty() {
return elementData.size() == 0;
}
public int size() {
return elementData.size();
}
}