Applications

1
Applications

• Introductory CS classes
• Great for inclass demos
• Upperlevel courses
• Distinctive features useful for all developers
• We use it in developing DrJava!

2
Future DirectionsIntegrated testing and debugging

• Seamless integration of JUnit
• Debugger
• Step into/out of/over methods
• Use interactions pane at breakpoints, in scope

3
Future DirectionsLanguage levels incremental
presentation of syntax

• Tailor environment to support teaching language
  constructs in stages (like in DrScheme)
• Prevents generating bogus error messages, e.g.,
  accidental definition of inner clases

4
Implementation

• 30,000 lines of Java code (Java 1.3 or 1.4)
• Incorporates DynamicJava (open source)
• Runs on any Java 1.3 or 1.4 VM (Windows, MacOS
  X, Linux, Solaris)

5
A case study in XP software development

• Pair programming
• Unit tests
• 31 of code in tests
• Must pass all tests to commit code
• Incremental specification and implementation
• Frequent releases (gt1 daily)
• Program has advanced substantially since we wrote
  the paper

6
A case study in XP software development (cont.)

• Developed first generation system in three months
  with 5 students
• Continuing development in a software engineering
  class
• New students contributed within three weeks
• Benefits of open source
• Everyone welcome to propose source code changes
  (but they better have unit tests!)
• sourceforge.net helps manage open-source projects

7
Download DrJava!
http//drjava.sf.net