Updated README with stopwatch information and usage example

README.md

@@ -1,3 +1,16 @@
 # JavaClasses
+This is a set of classes and functions, not part of the standard library, that I have found it helpful to keep around.
 
-This is a set of classes and functions, not part of the standard library, that I have found it helpful to keep around.
+#Stopwatch
+This is a class that allows you to determine the execution time of an algorithm.
+You can get specific resolutions of time through their own get functions, all of which return double.
+However I have built it a function, getStr(), that automatically chooses the best resolution and returns both the number and resolution as a string.
+This is used extensively in my ProjectEuler code found at https://bitbucket.org/Mattrixwv/ProjectEuler
+Example of usage:
+	Stopwatch timer = new Stopwatch();
+	timer.start();
+	//Code to time here
+	timer.stop();
+	System.out.printf("It took %s to run this algorithm", timer.getStr());
+	//You could also do something like this if you prefered
+	System.out.printf("It took %f milliseconds to run this algorithm", timer.getMilli());