The text currently reads:
"Notice that we declared grades to be of type ArrayList<double>, using the wrapper class Double rather than the primitive type double."
I believe the "double" in "ArrayList<double>" needs to start with an uppercase "D", like this:
"Notice that we declared grades to be of type ArrayList<Double>, using the wrapper class Double rather than the primitive type double."
It looks like there's a typo on this page: http://education.launchcode.org/skills-back-end-java/java4python/data-structures-and-collections/
The text currently reads: "Notice that we declared grades to be of type ArrayList<double>, using the wrapper class Double rather than the primitive type double."
I believe the "double" in "ArrayList<double>" needs to start with an uppercase "D", like this: "Notice that we declared grades to be of type ArrayList<Double>, using the wrapper class Double rather than the primitive type double."