Accessing a png from inside a JAR

Currently I have a compiled JAR file as follows

RunMe.jar  
-GUIFile.class  
-Main.class  
-Notify.class  
-resources  
--sprites  
---myimg.png  
-com  
--random  
---package  
----MakeNotify.class  

Please explain to me how to access the PNG myimg.png inside MakeNotify.java

Thanks for all the advice in advanced