anchor.diff:  
   *Prerequisites:* This tutorial assumes that you have <<documentation#,downloaded the jMonkeyEngine SDK>>.
   
  -In this tutorial series, we assume that you use the jMonkeyEngine <<sdk#,SDK>>. As an intermediate or advanced Java developer, you will quickly see that, in general, you can develop jMonkeyEngine code in any integrated development environment (NetBeans IDE, Eclipse, IntelliJ) or even from the <<jme3/simpleapplication_from_the_commandline#,command line>>. 
  +In this tutorial series, we assume that you use the jMonkeyEngine <<sdk#,SDK>>. As an intermediate or advanced Java developer, you will quickly see that, in general, you can develop jMonkeyEngine code in any integrated development environment (NetBeans IDE, Eclipse, IntelliJ) or even from the <<jme3/simpleapplication_from_the_commandline#,command line>>.
   
   OK, let's get ready to create our first jMonkeyEngine3 application.
   
  
positive.code: 
  === Start the SimpleApplication
  
  Look at the first line. Your HelloJME3.java class extends `com.jme3.app.SimpleApplication`. 
  
  [source,java]
  ----
  
negative.code:         HelloJME3 app = new HelloJME3();
          app.start(); // start the game
      }
  
      @Override
      public void simpleInitApp() {
          Box b = new Box(1, 1, 1); // create cube shape
  