Assignment 7: Multi Threading & Synchronization
	              Dr. Huaqing Wang

I.	Purposes:
	- Multiple Threading.
	- Monitor and Synchronization
	- Classic Synchronization Problems.

II.	Files:

        - "threadSynchronization.zip" is a zip file contains 11 java source
	  files for three classic synchronization problems. Those
	  synchronization problems include Producer & Consumer, River crossing
	  and Smoker problems.
        - There are one or more versions of solutions to each of those 3
	  problems.

III.  Key Conpcepts of Parallel/Concurrency Algorithms

    - Multiple programs/threads are working together on the same machine with
      shared variables/data.
    - One more than one programs/threads access, especially modify, the data
      the result data may not correct, or inconsistant.
    - The code sections accessing shared data are critical and they should be
      mutually exclusively excuted.
    - Java gives two tools, symorphon and monitor for mutual exclude the
      critical sections, so that syncrhronization can be enforced.
    - A monitor in Java is class with mututlly excusive data and/or function
      members

IV.	What You need to do for this assignment:

	- Compile and Run each of the files with main in it. To find whether
	  a file has main in it, use "grep main *.java".
	  Notice that if a program cannot run under Unix/Linex, run it under
	  Windows environment.

        - Read and study at least one version of solution for each of three
	  problems.
        - Learn the GUI programming skill and apply the skills to write a
        a solution to Dinning Philosophers program.

    - Read the dinning philosophers problem at

             https:://en.wikipedia.org/wiki/Dining_philosophers_problem

   - Write a Java GUI program to simulate 5-dinning philosoper problem.