Intro to java programming

Intro to java programming

• 1.
  Intro to JavaProgramming
• 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.
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  BRIEF HISTORY OFJAVA
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  Brief History ofJava • 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)
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  Brief History ofJava
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  INSTALLATIONS
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  Installations • Copy theJavaClass 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 theJAutoDoc plugin into the eclipse directory
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  JAVA OVERVIEW
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  Java Overview • Objectoriented • 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
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  Java Overview • Anatomyof a java class file
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  OBJECT ORIENTATION
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  Object Orientation • Whatis 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.
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  Object Orientation • OOConcepts • 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 • OOConcepts (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 • OOConcepts (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 • OOConcepts (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 • OOConcepts (Continued) • Override • Sometimes you need to override (redefine) attributes and/or methods in subclasses