Introduction to OOP Chapter 2: Abstraction : next previous audio real text

Levels of Abstraction -- A Method in Isolation

Finally, we consider the implementation of each method in isolation.
public class LinkedList implements Stack ... {
	public void pop () throws  EmptyStackException { 
		if (isEmpty())
			throw new EmptyStackException();
		removeFirst(); // delete first element of list
Every level is important, and often you move quickly back and forth between levels.
Intro OOP, Chapter 2, Slide 11