Notes to OOP features of the Jeroo language

Object oriented programming defines objects

• Each Jeroo you create is an _______________.
• an object has ________________
• For example a Jeroo has: _____________ , ______________ , ______________
• an object has _________________ (things it can do)

Classes = definitions of objects

A class describes 3 things:

1. What kind of ____________ is in an object
2. How to make a ___ object of that class (constructor)
   • Try this Example: Dim Quentin as Jeroo = new Jeroo(10,7,EAST,1)
     • Holding ____ flower/s
     • Location = row ____, column ____
     • Direction = ___________
   • The default constructor creates a Jeroo at location ________ facing ___________ with ____ flowers
     • Dim Andy as Jeroo = new Jeroo()
3. The _____________ of an object (the actions it can perform)
• Example: Andy.hop()
• Jeroos can hop, pick flowers, plant flowers, toss nets, and turn.

Syntax is important!

• Dim Andy as Jeroo = new Jeroo(2,5,SOUTH,3);
• Andy is an _____________ , Jeroo is the ________________

Sending messages to objects

A message looks like this:

• object . method ( extra information )
• The __________ is the thing we are talking to
• The ____________ is a name of the action we want the object to take
• The ___________________ is anything required by the method in order to do its job. (parameter)

Messages and methods

• ______ an object some information
• ______ an object to do something
• ______ an object for information (usually about itself)
• Any and all combinations of the above

Using OOP syntax: Rewrite the following English statements as object oriented messages

• Tell the woman named Clarissa to walk 2 steps ____________________________
• Tell the Jeroo named Alan to turn to the right ______________________________

Vocabulary Review (watch out! the order is mixed up!)

• • _________: something that you “say” to an object, either telling it something or asking it for information
• • _________: an instance, or member, of a class
• • _________: the type, or description, of an object
• • _________: extra information sometimes needed when sending a message.
• • _________: a way to create an object. comes as part of the class definition.