1. Introduction to Advanced Java Programming
Chapter 1
Java Programming: Advanced Topics

2. Java Programming: Advanced Topics
Objectives
Review what Java is and differences between the three editions of the Java 2 platform: J2SE, J2EE, and J2ME
Explore the context in which Java and related technologies are evolving
See how Java supports object-oriented programming and look at some popular design patterns
Java Programming: Advanced Topics

3. Java Programming: Advanced Topics
Objectives (Cont.)
Learn how to use the basic tools that version of Java 2 Software Development Kit provides, especially javac, java, javadoc, and jar
Java Programming: Advanced Topics

4. Overview of the Java Platform
The Java language is object-oriented
Java code is architecture-neutral and portable
Java is network-savvy
Java programs are secure
Java is high performance
Java Programming: Advanced Topics

5. Java Programs and Components
JavaBeans: classes or program components that conform to strict programming conventions
Applets: components that can be launched from HTML documents and run in a Web browser or applet viewer utility
Servlets: components that generate content for Web pages at runtime
Enterprise JavaBeans (EJBs): server-side components used in distributed enterprise environments
Java Programming: Advanced Topics

6. The Three Editions of the Java 2 Platform
The Java 2 platform comes in three versions:
Java 2 Standard Edition (J2SE)
Java 2 Enterprise Edition (J2EE)
Java 2 Micro Edition (J2ME)
Java Programming: Advanced Topics

7. Containers in the n-Tier J2EE Architecture
Java Programming: Advanced Topics

8. A Brief History of the Java Platform
1995: Version 1.0 (Sun Microsystems)
1997: Version 1.1
1998: Java 2 platform
1999: J2SE, J2EE, and J2ME
2001: Version 1.3 of J2SE
2002: Version 1.4
2002: Version 1.3 of J2EE
Java Programming: Advanced Topics

9. Object-Oriented Programming in Java
The key benefits of object-oriented programming are:
code reuse
flexibility to respond to changing circumstances and requirements
ease of maintenance
Java Programming: Advanced Topics

10. Object-Oriented Programming in Java (Cont.)
A program is a collection of objects that send messages to each other
Object-oriented analysis and design (OOAD):
First stage: perform object-oriented problem analysis
Second stage:
Identify classes to be implemented
Identify fields and methods the classes must contain to model the behavior of real-life objects
Java Programming: Advanced Topics

11. Object-Oriented Methodology
Java lends itself to iterative and incremental object-oriented development methodology
In large projects, functionality is typically added in stages and each identifiable stage is an increment
An iteration is a short-term development cycle within an increment
Java Programming: Advanced Topics

12. Object-Oriented Features of Java
Java supports the following fundamental features of all object-oriented languages:
Abstract data types
Encapsulation
Inheritance
Polymorphism
Java Programming: Advanced Topics

13. Design Patterns and Frameworks
Design pattern: proposed solution to common design problem
Frameworks: collections of reusable classes
Popular design patterns:
Model-View-Controller design pattern
Singleton design pattern
Factory design pattern
Adapter design pattern
Façade design pattern
Java Programming: Advanced Topics

14. Model-View-Controller Design Pattern
Java Programming: Advanced Topics

15. An Implementation of the Singleton Design Pattern
Java Programming: Advanced Topics

16. An Implementation of the Factory Design Pattern
Java Programming: Advanced Topics

17. Java Programming: Advanced Topics
Standard SDK Tools
The Java platform includes a tool set for developing Java programs
The J2SDK tools run only in a command-line window and provide basic functionality
Java Programming: Advanced Topics

18. Standard SDK Tools (Cont.)
Standard J2SDK tools:
javac compiler
java launcher
javadoc documentation builder
jar packaging utility
Java Programming: Advanced Topics

19. How the Launcher Finds Classes
Java command locates bytecode files by class name
Launcher loads bytecode from the file with the extension .class and with the case-sensitive base filename that matches the class name
Java Programming: Advanced Topics

20. How the Compiler Finds Classes
For public classes
Source file must have the same name as the class
Every public class must be in a separate file
javac command has a -sourcepath option to specify the location of input source files when different from the location of compiled classes
Java Programming: Advanced Topics

21. Java Programming: Advanced Topics
javadoc Comments
The javadoc tool is a utility for generating HTML documentation directly from comments in Java source code
Doc comments
Start with a slash and two asterisks (/**)
Terminate with one asterisk and a slash (*/)
Java Programming: Advanced Topics

22. javadoc Comments (Cont.)
Doc comments can appear before the following kinds of declarations:
Class
Interface
Field
Method
Java Programming: Advanced Topics

23. javadoc Comments (Cont.)
Java Programming: Advanced Topics

24. Creating HTML from javadoc
To get HTML output in the standard format, run the javadoc program
Doclet: plug-in program for javadoc that formats and outputs required documentation
The javadoc tool
Preprocesses doc comments into a data structure
Delegates to a doclet conversion of data into output
Java Programming: Advanced Topics

25. An index.html File Generated by javadoc
Java Programming: Advanced Topics

26. Packaging Programs for Distribution
The standard way to distribute J2SE is to combine files into a Java archive file using the jar tool
Before running the jar tool, make sure your files are in the proper folders
Java Programming: Advanced Topics

27. Java Programming: Advanced Topics
Summary
The Java 2 platform comes in three versions: Java 2 Standard Edition (J2SE), Java 2 Enterprise Edition (J2EE), and Java2 Micro Edition (J2ME).
You can write different kinds of programs in Java including standalone applications, applets, servlets and JSPs, JavaBeans and Enterprise JavaBeans (EJBs).
Java Programming: Advanced Topics

28. Java Programming: Advanced Topics
Summary (Cont.)
Java is an object-oriented language and lends itself to the creation of reusable components.
Java language supports abstract data types, encapsulation, inheritance, and polymorphism, uses iterative and incremental methodology, and implements design patterns.
The SDK includes command line tools: the javac compiler, java launcher, javadoc documentation builder, and jar packaging utility.
Java Programming: Advanced Topics