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/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package diningphilosopy;
/**
*
* @author FARHATH
*/
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
Chopstick chpk[] = new Chopstick[5];
Philosophers phil[] = new Philosophers[5];
Thread[] threads = new Thread[5];
for(int i =0 ; i<5;>
chpk[i]= new Chopstick(i);
}
for(int i=0; i<5;>
if(i== 4){
phil[i] = new Philosophers(i, chpk[0], chpk[i]);
}
else{
phil[i] = new Philosophers(i, chpk[i+1], chpk[i]);
}
}
for(int i =0 ; i<5;>
threads[i] = new Thread(phil[i]);
threads[i].start();
}
}
}
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/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package diningphilosopy;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* @author FARHATH
*/
public class Philosophers implements Runnable {
private int PhilId;
private Chopstick left, right;
public Philosophers(int id, Chopstick left, Chopstick right) {
this.PhilId = id;
this.left = left;
this.right = right;
}
public int getPhilId() {
return PhilId;
}
public void setPhilId(int PhilId) {
this.PhilId = PhilId;
}
public Chopstick getLeft() {
return left;
}
public void setLeft(Chopstick left) {
this.left = left;
}
public Chopstick getRight() {
return right;
}
public void setRight(Chopstick right) {
this.right = right;
}
public void run() {
for (int i = 0; i <>
try {
Thread.sleep(1);
boolean hasTakenUp = false;
boolean hasAte = false;
int attempt = 1;
Thread.sleep(10);
do {
synchronized (right) {
synchronized (left) {
if (!right.isIsUp() && !left.isIsUp()) {
right.pickUp();
left.pickUp();
hasTakenUp = true;
System.out.println("Philosoper " + PhilId + " got the sticks in his " + attempt + " attempt " );
}
}
}
if (hasTakenUp) {
eat();
hasAte = true;
}
else{
System.out.println("Oophs ! philosopher "+ PhilId+ "didn't get the chance to eat in his "+ attempt+ " attempt " );
}
Thread.sleep(10);
attempt++;
}while(!hasAte);
} catch (InterruptedException ex) {
Logger.getLogger(Philosophers.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
public void eat() {
try {
Thread.sleep(10);
System.out.println("----The philosopher " + PhilId + " is eating now------");
right.keepDown();
Thread.sleep(10);
left.keepDown();
Thread.sleep(10);
System.out.println("The philosopher " + PhilId + " is back to thinking now");
Thread.sleep(10);
} catch (InterruptedException ex) {
Logger.getLogger(Philosophers.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
------------------
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package diningphilosopy;
/**
*
* @author FARHATH
*/
public class Chopstick {
private int stickId;
private boolean isUp;
public Chopstick(int id){
this.stickId = id;
}
public int getStickId() {
return stickId;
}
public void setStickId(int stickId) {
this.stickId = stickId;
}
public boolean isIsUp() {
return isUp;
}
public void setIsUp(boolean isUp) {
this.isUp = isUp;
}
public boolean pickUp(){
System.out.println("The chopstick "+ stickId + " is picked up");
isUp = true;
return true;
}
public void keepDown(){
System.out.println("The chopstick "+ stickId + " is kept down back");
isUp = false;
}
}
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