This lecture explores Kotlin's concise syntax for
class definitions, comparing it with that of Java. It considers how
properties are used to provide access to the
underlying fields in a class. It looks at object initialisation
using primary & secondary constructors and init
blocks. It also looks at how custom getters and setters can be
written for properties. Finally, it considers the role played by
the object keyword in defining instances of anonymous
classes, creating singletons and simulating the effects of Java's
static keyword.