Assignment 6: Multi Threading & Synchronization
	              Dr. Huaqing Wang

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

II.	Files:

        - "3ClassicSynchronization.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 or different 
      machine with shared variables/data. Now we deal with programs or threads
      running on the same machine, and the the cases of running different machines
      need sockets or RMV (Vemote Method Invocation) technology.
    - One or more programs/threads access, especially modify, the data the
      result data may not correct, or inconsistant. The technique of synchnoization
      (implemented by mutual exclusion) is the key.
    - The code sections accessing shared data are called "critical section"  and
      they should be "mutually exclusively" excuted.
    - Java gives two tools, socket (for link programs/threads running on different
      machines and monitor for mutual exclusionse.
    - A monitor in Java is class with mutully 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.