Java Threads - Producer consumer problem

// Thread Synchronization

// Producer Consumer Problem

class Q

{

     int n;

     boolean Flag = false;

     synchronized int get()

     {

          if(Flag == false)

          try

          {

              wait();

          }

          catch(InterruptedException e)

          {

              System.out.println("InterruptedException caught");

          }

         

          System.out.println("Received : "+n);

          Flag = false;

          notify();

          return n;

     }  

     synchronized void put(int n)

     {

          if(Flag == true)

          try

          {

              wait();

          }

          catch(InterruptedException e)

          {

              System.out.println("InterruptedException caught");

          }

         

          this.n = n;

          Flag = true;

          System.out.println("Sent : "+n);

          notify();

     }  

}

class Producer implements Runnable

{

     Q q;

     Thread t;

    

     Producer(String name, Q q)

     {

          this.q = q;

          t = new Thread(this, name);

          t.start();

     }

     public void run()

     {

          int i=1;

         

          while(true)

              q.put(i++);

     }

}

class Consumer extends Thread

{

     Q q;

    

     Consumer(String name, Q q)

     {

          super(name);

          this.start();

          this.q = q;

     }

     public void run()

     {

          while(true)

              q.get();

     }

}

class PC

{

     public static void main(String as[])

     {

          Q q1 = new Q();

          Producer p1 = new Producer("P", q1);

          Consumer c1 = new Consumer("C", q1);

     }

}