Write a program for producer consumer using thread

/* Aim : Write a program for producer consumer using thread */
import java.lang.*;

class Q
{
int n;
synchronized int get()
{
System.out.println("\n\tGot : "+n);
return(n);
}
synchronized void put(int n)
{
this.n=n;
System.out.println("\n\tPut : "+n);
}
}

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++);
try {
        Thread.sleep(2000);
    } catch (InterruptedException e) {
        // We've been interrupted: no more messages.
        return;
   }
}
}
}

class consumer implements Runnable
{
Q q;
consumer(Q q)
{
this.q=q;
new Thread(this,"consumer").start();
}
public void run()
{
while(true)
{
q.get();
try {
        Thread.sleep(2000);
    } catch (InterruptedException e) {
        // We've been interrupted: no more messages.
        return;
   }

}
}
}

class pr_7
{
public static void main(String argv[]) throws Exception
{
Q q= new Q();
new producer(q);
new consumer(q);

System.out.println("\nPress ctrl + c to stop");
}
}

/* OUTPUT
C:\jdk\bin>javac pr_7.java

C:\jdk\bin>java pr_7

        Put : 0

Press ctrl + c to stop

        Got : 0

        Put : 1

        Got : 1

        Put : 2

        Got : 2

        Put : 3

        Got : 3

        Put : 4

        Got : 4

        Put : 5

        Got : 5

C:\jdk\bin>
*/