Week 4 - Java's Object Orientation, I/O

Overloading

Question: What is it? Why is it useful?

Garbage Collection

Question: What does it mean?

Accessability modifiers

Question: Purpose? What are the Java accessability modifier keywords?

Object Oriented Programming

Encapsulation

• An instance of an class (an object) should contain just what is needed to model a real world thing to the necessary detail to accomplish a problem task.

• Implementation details should not be accessible.

Inheritance

• An object type can provide additional details (specialization) and capabilities than are provided by a more generic type.

  Question: What is the Java keyword that signals you are using inheritance?

• Creating abstract and generic classes and then sub classes that inherit from them can be useful to reduce code duplication.

Input/Output

• Character Streams - Readers and Writers

• Examples of reading file contents

• Reading Strings

• Converting characters in Strings into primitive data

Exceptions

Question: What are they? How do you deal with them?

File I/O, handling exceptions, interpreting contents