Intro to java programming
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This document provides an agenda and overview for an intro to Java programming class. It includes sections on class introductions, a brief history of Java, installations, and an overview of the Java language and object-oriented concepts. The class will cover installing Java, the Eclipse IDE, and reviewing key OO concepts like abstraction, encapsulation, inheritance and polymorphism.
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Intro to java programming
- 1. Intro to Java Programming
- 2. Adgenda • Class Introductions • Brief History of Java • Installations • Java JDK • Eclipse IDE • High Level Overview of Java Language • Object Orientation Introduction
- 3. Class Introductions • Name • Grade • Programming Experience • Any languages other than java? • Favorite musical artist • What you expect to get from the class.
- 4. BRIEF HISTORY OF JAVA
- 5. Brief History of Java • Developed at Sun Microsystems by James Gosling • Initial version was, called Oak, was based on C++ • Released in 1995 • Initial vision was to automate consumer devices (TVs, cable boxes,VCRs etc.) • Released with the HotJava browser • Designed with a write once run anywhere concept (Hardware independent)
- 6. Brief History of Java
- 8. Installations • Copy the JavaClass directory from the USB drive to your C drive • Run the java installer (either 32 or 64 bit depending on your OS) • Extract the eclipse distribution archive into the JavaClass directory on your C drive • Copy JarClassFinder to the eclipse dropins directory • Install ObjectAid from the update site (http://www.objectaid.net/update)
- 9. Installations • Expand the JAutoDoc plugin into the eclipse directory
- 10. JAVA OVERVIEW
- 11. Java Overview • Object oriented • Two types of java programs • Standalone • Normal program run on a computer • Can have a GUI or be headless • Applet • Run inside a web browser
- 12. Java Overview • Anatomy of a java class file
- 14. Object Orientation • What is OO? • An OO solution categorized into 3 phases • Analysis • The analysis of a problem that focuses on the problem domain and the discovery of the domain entities and their interactions and relevant state information. • Design • The process of taking the analysis output and refining and extending it into a collection of cooperating classes that can be implemented to form a solution to a set of user requirements. • Programming • An approach that facilitates creation of modular, reusable components through the use of object oriented concepts.
- 15. Object Orientation • OO Concepts • Abstraction • The identification of the essential characteristics of an item • Encapsulation • The grouping of related concepts into one item, such as a class or component • Information hiding • The restriction of external access to attributes • Aggregation • Represents “is part of” or “contains” relationships between two classes or components
- 16. Object Orientation • OO Concepts (Continued) • Class • A template from which objects are • Interface • The definition of a collection of one or more operation signatures that defines a cohesive set of behaviors • Collaboration • Classes work together (collaborate) to fulfill their responsibilities • Message • A message is either a request for information or a request to perform an
- 17. Object Orientation • OO Concepts (Continued) • Operation • Something a class does (similar to a function in structured programming) • Inheritance (Single and Multiple) • Represents “is a”, “is like”, and “is kind of” relationships. When class “B” inherits from class “A” it automatically has all of the attributes and operations that “A” implements • Polymorphism • Different objects can respond to the same message in different ways, enable objects to interact with one another without knowing their exact type
- 18. Object Orientation • OO Concepts (Continued) • Subclass • If class “B” inherits from class “A,” we say that “B” is a subclass of “A” • Superclass • If class “B” inherits from class “A,” we say that “A” is a superclass of “B” • Operation • Something a class does (similar to a function in structured programming)
- 19. Object Orientation • OO Concepts (Continued) • Override • Sometimes you need to override (redefine) attributes and/or methods in subclasses