Week 8

Monitors in Java

Java case study (starter code for Assign 4)
- this version deadlocks!
- you will use two different approaches to fix:
  - synchronized methods
  - synchronized code blocks

Obscure Java
- shortest compilable Java program?
  - does it run?
  - what's it good for?
- inner classes
  - what are they?
  - what are they good for?
  - what do they look like when compiled?
- what does any of this have to do with the assignment?

Assignment: Dining Java Philosophers

Assign 4
- PDF
- due: Tue, Mar 31, 11:59pm

Channels

Communicating Sequential Processes (CSP) and Golang (Go)!
- RIP: C.A.R. 'Tony' Hoare (March 5, 2026; 92 years old)
  - Wikipedia
  - BCS Article: Celebrating the Life of C.A.R. 'Tony' Hoare
- Hoare discusses the origins of QuickSort
- Hoare's 1978 CSP paper
- Hoare's 1985 CSP textbook

Peter Welch's slides introducing CSP and occam-pi (but we will use Go this semester!)
- Occam-pi Lecture Notes
- today:
  - Objects Considered Harmful (slide 27 of motivation.pdf slides)
  - even though we won't be programming in occam-pi, I want to give you a flavor of it
  - because:
    - ultimate lightweight processes!
    - composition!
  - basics.pdf
    - basics of channel communication: slides 11–12
    - Legoland: slides 83–end