Introduction to OOP

Chapter 2: Abstraction :

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.

Levels of Abstraction -- A Method in Isolation

Intro OOP, Chapter 2, Slide 11