Aqui va a ver crash!

public class HelloWorld{

     public static void main(String []args){
        byte[] foo = doFoo();

        if (foo != null)
            System.out.println("foo is " + foo.toString());
        else
            System.out.println("foo is " + foo);


        System.out.println("foo is " + foo.toString()); // Aqui va a ver crash!
     }

     static byte [] doFoo() {
         return null;
     }
}