SemaphoreDemo: Added comments

Technology/SemaphoreDemo/src/SemaphoreDemo.java

@@ -2,6 +2,10 @@
 // 
 // java application to demonstrate 
 // use of semaphores (Locks)
+//
+// The Semaphore constructor takes one argument: The number of permits!
+// Every acquire granted will decrease the number of available permits by 1.
+// Every release of an acquired semaphore will increase the number of permits.
 
 import java.util.concurrent.*; 
 
@@ -12,9 +16,9 @@ public class SemaphoreDemo
 	public static void main(String args[]) throws InterruptedException 
 	{ 
 		// creating a Semaphore object 
-		// A 1 means that you are allowed 1 write to start with
+		// Granting 1 permit: You may write one object to the buffer
 		Semaphore semPro = new Semaphore(1);
-		// A 0 means that you are not allowed to read (as nobody has yet written to the buffer)
+		// Granting 0 permits: Thou shallt not read what hasn't yet been written! (as nobody has yet written to the buffer)
 		Semaphore semCon = new Semaphore(0);
 		
 		// creating two threads named "Producer" and "Consumer"