Simulation java 讲解、辅导国外Simulation java 程序讲解留学生Processing|调试Matlab程序

import java.util.Random;

/**
* Simulates an operating system for the purposes of testing a scheduler. It creates
* a bunch of jobs and then runs them until they are done outputing the information
* on which job is scheduled and when.
*
*
*/
public class Simulation
{
private Queue scheduler;

private static final int DEFAULT_TIME = 100;
private static final int NUMBER_OF_JOBS = 10;
private static final int PRIORITY_LEVELS = 3;
private static final int MAX_DURATION = 1000;

/**
* Creates an Operating System Simulator to test a given scheduler.
*
* @param scheduler The scheduler to test. The scheduler should use the Queue
* interface.
*/
public Simulation(Queue scheduler)
{
this.scheduler = scheduler;
}

/**
* Runs the simulator by creating a certain number of Jobs and then running
* until all the Jobs are completed. It outputs a progress report at each time
* it retrieves a new Job from the scheduler and runs it. By default it runs
* each Job for 100 milliseconds at a time, however, if a Job finishes before
* that time has elapsed the remaining time is given to the next Job.
*/
public void run()
{
if (scheduler == null)
{
return;
}

Random generator = new Random();
System.out.println("Creating jobs...");
for (int i = 0; i < NUMBER_OF_JOBS; i ++)
{
Job temp = new Job(generator.nextInt(PRIORITY_LEVELS),
generator.nextInt(MAX_DURATION));
scheduler.enqueue(temp);
System.out.println(temp);
}

System.out.println();
System.out.println("Running jobs...");
int time = DEFAULT_TIME;
while (!scheduler.isEmpty())
{
Job active = scheduler.dequeue();

System.out.println("Running Job " + active.getId() + " for " + time + " milliseconds..");
if (active.getDuration() >= time)
{
active.run(time);
time = DEFAULT_TIME;
}
else
{
time = DEFAULT_TIME + time - active.getDuration();
active.run(active.getDuration());
}
System.out.print("..." + active);

if (active.getDuration() > 0)
{
scheduler.enqueue(active);
System.out.println();
}
else
{
System.out.println(" COMPLETE!");
}
}
}

/**
* The main method creates the scheduler and the operating system simulator
* on which to test it. It also runs the simulator. Modify the main method
* in order to change the scheduler and compare the results.
*/
public static void main(String[] args)
{
Queue jobs = null; // Replace null with the queue you want to test
Simulation simulator = new Simulation(jobs);
simulator.run();
}
}

Simulation java 讲解、辅导国外Simulation java 程序 讲解留学生Processing|调试Matlab程序

Simulation java 讲解、辅导国外Simulation java 程序讲解留学生Processing|调试Matlab程序