Welcome to Java as a second language

1
Welcome to Java as a second language!

• Assumes 2Qs familiarity with another language
  like C or Ada
• Assumes familiarity with object-oriented
  programming techniques
• Assumes familiarity with basic data structures
  (list, stack, queue, trees) and how to implement
  them

2
Syllabus

• Text Deitel, and WWW
• Prerequisites 2Q of C or Ada
• This is a programming class!

3
Syllabus

• Grading Projects 70, 2 exams 15 each
• Limited collaboration design and informal
  algorithms only
• Late assignments unacceptable.
• Due at beginning of class.
• Web page
• http//www.cs.nps.navy.mil/people/faculty/mackp/37
  73

4
Scheduling Issues

• Course Topics
• Java Basics
• User Interfaces and Graphics
• Streams and Files
• Networking
• Multi-Threading
• Optional Advanced Topics

5
Scheduling Issues

• This week
• Java Compilation
• Introduction to Java Syntax

6
Scheduling Issues

• Assignment 0 out Tuesday, due Thursday
• Assignment 1 out Th. 6 Apr, due 13 Apr
• First exam April 27
• Second exam TBA
• Around week 8 of class

7
Scheduling Issues

• No final!
• last programming assignment due Finals Week

8
What is Java? History of Java

• Development at Sun Microsystems in 1990
• Wanted a new language for control of consumer
  electronic devices
• Existing languages were too complex to write many
  compilers for
• Usually done with custom hardware

9
What is Java? History of Java

• Designed language for any kind of computer chip
  by making it easy to translate
• Oak was first used in a household-of-the-future
  controller
• name changed to Java in a coffee-shop, after
  hearing that Oak was taken

10
What is Java? History of Java

• simple, encapsulated Java was perfect for
  embedding in web pages
• Formally announced by Sun in May 1995
• supported by Netscape Navigator 2.0
• Java hype sparked by tremendous growth of the web

11
What is Java? Why use it?

• Completely Object-Oriented
• Automatic Garbage Collection
• Never call free() or delete() again!
• Created for GUI and networking
• Rich class libraries available for event-driven
  graphical interaction
• Java understands URLs directly

12
What is Java? Why use it?

• Architecture-Independent, Portable
• Built-in security model
• Robust memory management
• Native support for concurrent programming
• Industry Hype Java Jobs

13
Why Not Java?

• Interpreted translated slower
• C approximately 8 times faster than Java for
  arithmetic
• Some speed-up is possible
• just-in-time compilation binds classes in advance
  with spare cycles
• Portability is not an essential part of Java!

14
Why Not Java?

• No multiple inheritance (so?)
• No pointer arithmetic (so?)
• No templates (makes compiler design difficult)