Computer Science 225
Advanced Programming

Spring 2017, Siena College

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Agenda

• Announcements
  • If your group has not yet completed Lab 1, you have until start of your lab period on Wednesday to wrap it up
  • Next readings: Horstmann Chapter 8
  • Reminder about phones and tablets in class
• Discussion of Homework Project 1: Chutes and Ladders simulation (details in Blackboard), due in a week
• Kinds of errors
• A little more of: some Java you know and some Java you probably do not
  • Conditionals: ternary operator
  • Control structures: if-then[-else], switch, while, do-while, for, enhanced for, iterators, return, break, continue
• Classes
  • All Java code (variables and methods) is stored in classes (note interfaces and enums do not have actual code)
  • Support for data encapsuation and information hiding
  • a simple example: a tree node
  • class variables and methods vs. instance variables and methods (what's up with static?)
  • constructors
  • destruction - handled by garbage collection
  • reference variables
  • access control modifiers: public, protected, private, and default (package level)
  • another simple example: a coordinate pair
• A design tool: Unified Modeling Language (UML) class diagrams
  • three sections in a rectangle for each class:
    • top: class name
    • middle: data members/attributes
    • bottom: operations
  • include access control information: public: +, protected: #, private: -, and default: ~
  • include static information

Terminology

• order of operations
• associativity
• ternary operator
• enumerated types
• data encapsulation
• information hiding
• class members vs. instance members
• constructors
• reference variables
• access control
• UML class diagram

Links

• Java Branching Statements Tutorial
• UML on Wikipedia

Examples

• Ternary