package com.dudy.learn01.data_structure.stack;
import com.dudy.learn01.data_structure.list.MyArrayList;
public class MyStack {
private MyArrayList elementData = new MyArrayList();
public void push(Object o){
elementData.add(o);
}
public Object pop(){
Object o = elementData.get(elementData.size()-1);
elementData.remove(elementData.size());
return o;
}
public Object peek(){
return elementData.get(elementData.size()-1);
}
public boolean isEmpty(){
return elementData.size() == 0;
}
public int size(){
return elementData.size();
}
}