CPU Scheduling Simulator

Write a java program to simulate the following schedulers:

1. preemptive Shortest- Job First (SJF) Scheduling with context switching
   
2. Round Robin (RR) with context switching
   
3. preemptive Priority Scheduling (with the solving of starvation problem)
   
4. AG Scheduling :
   a. Each process is provided a static time to execute called quantum.
   b. Once a process is executed for given time period, it’s called FCFS till the
   finishing of (ceil(52%)) of its Quantum time then it’s converted tonon
   preemptive Priority till the finishing of the next(ceil(52%)), after that it’s
   converted to preemptive Shortest- Job First (SJF).
   c. We have 3 scenarios of the running process
   i. The running process used all its quantum time and it still have job to
   do (add this process to the end of the queue, then increases its
   Quantum time by Two).
   ii. The running process was execute as non-preemptive Priority and
   didn’t use all its quantum time based on another process converted
   from ready to running (add this process to the end of the queue, and
   then increase its Quantum time by ceil(the remaining Quantum
   time/2) ).
   iii. The running process was execute as preemptive Shortest- Job First
   (SJF) and didn’t use all its quantum time based on another process
   converted from ready to running (add this process to the end of the
   queue, and then increase its Quantum time by the remaining
   Quantum time).
   iv. The running process didn’t use all of its quantum time because it’s no
   longer need that time and the job was completed (set it’s quantum
   time to zero).