Producer & Consumer Problem

public class ProducerConsumerTest {

   public static void main(String[] args) {

      A a1 = new A();

      Producer p1 = new Producer(a1, 1);

      Consumer c1 = new Consumer(a1, 1);

      p1.start();

      c1.start();

   }

}

class A 

   private int contents;

   private boolean available = false;

  

   public synchronized int get() {

      while (available == false) {

         try {

            wait();

         } catch (InterruptedException e) {}

      }

      available = false;

      notifyAll();

      return contents;

   }

   public synchronized void put(int value) {

      while (available == true) {

         try {

            wait();

         } catch (InterruptedException e) { }

      }

      contents = value;

      available = true;

      notifyAll();

   }

}

class Consumer extends Thread {

   private A a1;

   private int number;

  

   public Consumer(A a, int number) {

      a1= a;

      this.number = number;

   }

   public void run() {

      int value = 0;

      for (int i = 0; i < 10; i++) {

         value = a1.get();

         System.out.println("Consumer #" + this.number + " got: " + value);

      }

   }

}

class Producer extends Thread {

   private A a1;

   private int number;

   public Producer(A a, int number) {

      a1 = a;

      this.number = number;

   }

   public void run() {

      for (int i = 0; i < 10; i++) {

         a1.put(i);

         System.out.println("Producer #" + this.number + " put: " + i);

         try {

            sleep(1000);//((int)(Math.random() * 100));

         } catch (InterruptedException e) { }

      }

   }

}