package src;
import java.util.EmptyStackException;
/**
* Created by Yang on 2/25/2017.
*/
public class MyStack {
private MyArrayList stack = new MyArrayList();
public void push(Object obj){
stack.add(obj);
}
public Object pop(){
if (stack.size()==0){
throw new EmptyStackException();
}
return stack.remove(stack.size()-1);
}
public boolean isEmpty(){
return stack.isEmpty();
}
}