Introduction to Object-Oriented Programming

Objects and classes

Encapsulation and information hiding

Mental exercises
Classification and exemplification
Aggregation and decomposition
Generalization and specialization

• Inheritance

• Polymorphism and dynamic binding

• Java an example of an object-oriented programming language

Program example
History of Java
Comparison to C/C+

Comments

case Java Keyword

The case is used to label each branch in a switch statement. Examples int arg = <some value>; switch (arg) { case 1: <statements> break; case 2: <statements> break; default: <statements> break; }

A class is a collection of objects (or values) and a corresponding set of methods. A class encapsulates the data representation and makes data access possible at a higher level of abstraction. Example 1: A set of vehicles with operations for starting, stopping, driving, get km/liter, etc. Example 2: A time interval, start time, end time, duration, overlapping intervals, etc. Example 3: A string, upper case, compare, lower case, etc. str.equals(otherStr) – class/Java style strcmp(str, otherStr) – C style

JAVA

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