ell me this code is used for what and explain to me how dose this code work and what happens in each class and method import java.util.concurrent.Semaphore; class Q { // an item int item; // semCon initialized with 0 permits // to ensure put() executes first static Semaphore semCon = new Semaphore(0); static Semaphore semProd = new Semaphore(1); // to get an item from buffer void get() { try { // Before consumer can consume an item, // it must acquire a permit from semCon semCon.acquire(); } catch (InterruptedException e) { System.out.println("InterruptedException caught"); } // consumer consuming an item System.out.println("Consumer consumed item : " + item); // After consumer consumes the item, // it releases semProd to notify producer semProd.release(); } // to put an item in buffer void put(int item) { try { // Before producer can produce an item, // it must acquire a permit from semProd semProd.acquire(); } catch (InterruptedException e) { System.out.println("InterruptedException caught"); } // producer producing an item this.item = item; System.out.println("Producer produced item : " + item); // After producer produces the item,
tell me this code is used for what and explain to me how dose this code work and what happens in each class and method
import java.util.concurrent.Semaphore;
class Q {
// an item
int item;
// semCon initialized with 0 permits
// to ensure put() executes first
static Semaphore semCon = new Semaphore(0);
static Semaphore semProd = new Semaphore(1);
// to get an item from buffer
void get()
{
try {
// Before consumer can consume an item,
// it must acquire a permit from semCon
semCon.acquire();
}
catch (InterruptedException e) {
System.out.println("InterruptedException caught");
}
// consumer consuming an item
System.out.println("Consumer consumed item : " + item);
// After consumer consumes the item,
// it releases semProd to notify producer
semProd.release();
}
// to put an item in buffer
void put(int item)
{
try {
// Before producer can produce an item,
// it must acquire a permit from semProd
semProd.acquire();
}
catch (InterruptedException e) {
System.out.println("InterruptedException caught");
}
// producer producing an item
this.item = item;
System.out.println("Producer produced item : " + item);
// After producer produces the item,
// it releases semCon to notify consumer
semCon.release();
}
}
// Producer class
class Producer implements Runnable {
Q q;
Producer(Q q)
{
this.q = q;
new Thread(this, "Producer").start();
}
public void run()
{
for (int i = 0; i < 5; i++)
// producer put items
q.put(i);
}
}
// Consumer class
class Consumer implements Runnable {
Q q;
Consumer(Q q)
{
this.q = q;
new Thread(this, "Consumer").start();
}
public void run()
{
for (int i = 0; i < 5; i++)
// consumer get items
q.get();
}
}
// Driver class
class PC {
public static void main(String args[])
{
// creating buffer queue
Q q = new Q();
// starting consumer thread
new Consumer(q);
// starting producer thread
new Producer(q);
}
}
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