mi potreste spiegare?

[soul84]

qualcuno mi può spiegare cosa succede in questa classe?grazie
vi prego è urgente...
devo scrivere una relazione..e spiegare queste due classi cosa fanno!please


package it.threads.stations;

public class FuelMan extends Thread {
private boolean running = false;
private boolean isWorking = false;
FuelStation fuelStation;

public FuelMan(FuelStation fs) {
running = true;
this.fuelStation = fs;
}

public boolean isWorking() {
return isWorking;
}

public void run() {
super.run();
while(running) {
try {
synchronized (this) {
this.wait();
//Svegliato
isWorking = true;
}
int wt = (int)(Math.random()*10) + 20; //Wait time
//System.out.println("WaitTime: "+wt);
Thread.sleep(wt);
fuelStation.returnKeysToDriver();
synchronized (this) {
isWorking = false;
}
} catch (InterruptedException e) {}
}
}

public void stopFuelMan() {
running = false;
}
}

[soul84]

anche questa..

package it.threads.stations;

import it.threads.cars.Car;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.TreeSet;

public class FuelStation extends Thread {
public static final int BENZ_TYPE = 1;
public static final int DIESEL_TYPE = 2;
public static final int BIFUEL_TYPE = 3;

boolean running = false;
ArrayList<Car> queue;
Car activeCar;
FuelMan fuelMan;
int type;

Hashtable<String, Integer> stats;
int tot;
float avg;
int dequeued;

public FuelStation(int type) {
this.type = type;
queue = new ArrayList<Car>();
fuelMan = new FuelMan(this);
fuelMan.setName("Fuel Man #"+type);
fuelMan.start();
stats = new Hashtable<String, Integer>();
running = true;
tot = 0;
avg = 0;
dequeued = 0;
}

public void enqueueCar(Car c) {
queue.add(c);
}

public void dequeueCar(Car c) {
queue.remove(c);
dequeued++;
}

public void nextCar() {
Car c = queue.remove(0);
//Stats
String name = c.getName();
int prev = (stats.get(name) != null)?stats.get(name):0;
stats.put(name, prev+1);
tot++;
avg = ((avg * (tot-1)) + this.getWaitTime(c)) / tot;

synchronized (c) {
c.notify();
}
}

private int getWaitTime(Car c) {
return (int)(Calendar.getInstance().getTimeInMillis() - c.getMills());
}

public Car getActiveCar() {
return activeCar;
}

public void setActiveCar(Car activeCar) {
this.activeCar = activeCar;
}

public void giveKeysToFuelMan(Car c) {
//Set Active Car
this.setActiveCar(c);
synchronized (fuelMan) {
fuelMan.notify();
}
}

public void returnKeysToDriver() {
Car c = this.getActiveCar();
synchronized (c) {
c.notify();
}

}

@Override
public void run() {
while (running) {
//Debug.print("Fuel Station "+this.getName()+" is waiting for next car...");
if(!fuelMan.isWorking() && !queue.isEmpty()) {
synchronized (this) {
this.nextCar();
}
}
try {
Thread.sleep(10);
} catch (InterruptedException e) {}
}
}

public void stopFuelStation() {
running = false;
fuelMan.stopFuelMan();
}

public void printStats() {
TreeSet<String> tree = new TreeSet<String>(stats.keySet());
System.out.println("====================== "+this.getName()+" Stats ======================");
Iterator<String> iter = tree.iterator();
while (iter.hasNext()) {
String k = iter.next();
int v = stats.get(k);
System.out.println(k+" ha fatto benzina "+v+" volte");
}
System.out.println("TOTALE RIFORNIMENTI: "+tot);
System.out.println("Tempo medio di attesa (in millisecondi): "+avg);
if(type == BIFUEL_TYPE) {
System.out.println("Automobili BiFuel passate ad un distributore di Benzina: "+dequeued);
}
System.out.println("====================== END "+this.getName()+" Stats ======================");
}
}

[LeleFT]

LEggere il regolamento please... postare il codice all'interno degli appositi TAG, urgente non esiste in nessun forum, i titoli non si mettono come il formaggio sulla pasta e non si viene su un forum per farsi fare le relazioni, ma per discutere di problemi di programmazione (altrimenti il forum si sarebbe chiamato in modo diverso).

Chiudo.

Ciao.