Object-oriented syntax in BBj

In this section, you learn how BBj implements object-oriented programming. You write a first class, reference classes from other programs and build an object-oriented dialog.

📄️What is object-oriented programming?

Refresh what object orientation means and find reading material if you are new to it.

📄️A first class in BBj

Write your first class in BBj and see the syntax of object-oriented code blocks.

📄️Reference classes from other programs

Use the USE verb to reference classes that live in other BBj programs.

📄️An object-oriented dialog

Develop an object-oriented dialog class that takes user input and returns it to the calling program.

📄️Additional documentation and useful hints

Find more documentation and hints about BBj classes, reflection and upgrading older object-oriented code.

📄️Exercise: Build a login dialog

Write a login dialog as a BBj class that checks a user name and password pair.

📄️Bonus exercise: Make your Tic-Tac-Toe object-oriented

Refactor your Tic-Tac-Toe game into an object-oriented design and decide how many classes you need.