//using synchronized keyword
class
Common
{
int
i;
boolean
flag=true;
/*
If flag is true, Producer will get executed and makes consumer to be in waiting
state. After Completion, producer makes Consumer Thread to get executed by
making flag as false. Stated simply,if flag is true, Consumer will wait and
producer will wait if flag is false.*/
synchronized
void produce(int j)
{
if(flag)
{
i=j;
System.out.println("Produced
Item = "+ i);
flag=false;
notify();//making
Consumer to get Executed
}
try{
wait();}catch(Exception
e)
{
System.out.println(e);}
}
synchronized
int consume()
{
try{
if(flag)
wait();
}catch(Exception
e)
{
System.out.println(e);
}
flag=true;
notify();
return i;
}
}
class
Producer extends Thread
{
Common c1;
Producer(Common c1)
{ this.c1=c1; }
public void run()
{
int i=0;
while(true)
{
i++;
c1.produce(i);
try{sleep(1000);}catch(Exception e)
{System.out.println(e);}
}
}
}
class
Consumer extends Thread
{
Common c1;
Consumer(Common c1)
{ this.c1=c1; }
public void run()
{
while(true)
{
int j=c1.consume();
System.out.println("Consumed item= "
+ j);
try{sleep(1000);}catch(Exception e)
{System.out.println(e);}
}
}
}
class
SynDemo2
{
public
static void main(String args[])
{
Common c1=new Common();
Producer p=new Producer(c1);
Consumer c=new Consumer(c1);
p.start();
c.start();
}
}
