Programming week 6

All classes inherit directly/indirectly from?

Object

What methods are defined in object?

toString() and equals()

Whats the use case of toString()

use it to produce a printable presentation of an object

Subclass Types

A subclass has its own type and is also of the type(s) of its superclass(es).

Liskow Sub Principle

Interface, if you need objects form this interface you need to override all abstract methods

What is a package?

Collection of classes

What does public mean?

Its visible in all classes

What does protected mean?

Visible in subclasses and classes of the same package ( same folder )

What does <none> mean?

Visible in classes of the same package

What does private mean?

Visible only in that class

What does static mean?

That thing* belongs not to an object but to the class