Lab $05$

Process Queue Simulator

Objective:

WiNrite a program which simulates first come first serve process scheduling using a queue.

Process Class. $(10$pts$)$

Create a class and name it exactly Process.

This class has two attributes:

Name: a non$-$null String, whose default value is $$none$$

Completion time: a positive decimal value that indicates how long the process has until it is finished, whose default value is $0\mathrm{.}0$

Create accessors and mutators for each attribute. Mutators must check for valid values.

This class must have a $$toString$$ method that returns a type String formatted as:

Process Name: Completion Time:

All the above must apply for full credit.

Queue Interface. $(10$pts$)$

Create an interface and name it exactly QueueI

The interface must accept a Generic Type.

The interface must have the following method signatures:

Enqueue: A public method that takes in a parameter of the Generic Type returns nothing.

Dequeue: A public method that takes in no parameters and returns the Generic Type.

Peek: A public method that takes in no parameters and returns the Generic Type.

Print: A public method that takes in no parameters and returns nothing.

All the above must apply for full credit.

Linked List Queue Class. $(20$pts$)$

Create a class and name it exactly LLQueue

The class must accept a Generic Type.

The class must have the following methods:

Enqueue: This method returns nothing and takes in some generic data that is added to the end of the queue.

Dequeue: This method removes and returns the first element$$s data of the queue as long as the head is not null.

Peek: Returns the first element$$s data but doesn$$t remove the element.

Print: Prints out the entire queue.

All the above must apply for full credit.

Process Scheduler Class. $(30$pts$)$

Create a class and name it exactly ProcessScheduler

This class has two properties:

Processes: This is a linked list queue of processes $($referred to as $$process queue$).$ This data structure holds the processes that are waiting to run.

Current Process: This is the currently running process of type Process. This is a separate value that is not contained in the process queue.

The class must have the following methods:

getCurrentProcess: This method takes no parameters and returns the currently running process. Note that this is not the first element of the process queue.

addProcess: Taking in a process via a parameter it either sets the current process if the current process is null or it adds it to the process queue. Also, it doesn$$t return any values.

runNextProcess: This method dequeues from the process queue and sets that to the current process.

cancelCurrentProcess: The current process is cancelled and is replaced by the first element on the process queue. Make sure that the process is also removed from the process queue after the current process has been set. Neither parameters nor return values are expected for this method.

printProcessQueue: This method should print all of the elements from the process queue.

All the above must apply for full credit.

IN JAVA, NOT PYTHON OR C$++$