Update README.md

Author: Pradyuman7

README.md

@@ -1,2 +1,15 @@
 # Toast-For-Java
 A java class that can be used for Toast like popup messages in simple Java applications
+
+## Usage
+
+```java
+String toastMsg = "This is the toast message";
+int toastMsgTime = 3500; //3.5 seconds
+int fadeInTime = 500; //0.5 seconds
+int fadeOutTime= 500; //0.5 seconds
+Toast.makeText(primarystage, toastMsg, toastMsgTime, fadeInTime, fadeOutTime);
+```
+
+Also, here `PrimaryStage` is the stage where the toast message will be attached. If you have only one stage then primaryStage is the parameter of the method start of your application. 
+[Read more about this here](docs.oracle.com/javase/8/javafx/api/javafx/stage/Stage.html).