Binary Cipher
 |
| Java Design Patterns | Consumer and Producer |
Pic credit: Freepic.com
// implementation of a producer and consumer.
class Q
{
int n;
boolean valueSet = false;
synchronized int get()
{
while(!valueSet)
try
{
wait();
}
catch(InterruptedException e)
{
System.out.println(“InterruptedException caught”);
}
System.out.println(“Got: ” + n);
valueSet = false;
notify();
return n;
}
synchronized void put(int n)
{
while(valueSet)
try
{
wait();
}
catch(InterruptedException e)
{
System.out.println(“InterruptedException caught”);
}
this.n = n;
valueSet = true;
System.out.println(“Put: ” + n);
notify();
}
}
class Producer implements Runnable
{
Q q;
Producer(Q q)
{
this.q = q;
new Thread(this, “Producer”).start();
}
public void run()
{
int i = 0;
while(true)
{
q.put(i++);
}
}
}
class Consumer implements Runnable
{
Q q;
Consumer(Q q)
{
this.q = q;
new Thread(this, “Consumer”).start();
}
public void run()
{
while(true)
{
q.get();
}
}
}
class PCproblem
{
public static void main(String args[])
{
Q q = new Q();
new Producer(q);
new Consumer(q);
System.out.println(“Press Control-C to stop.”);
}
}
Output:
Press Control-C to stop.
Put: 0
Got: 0
Put: 1
Got: 1
Put: 2
Got: 2
Put: 3
Got: 3
Put: 4
Got: 4