In need of coding help

[cyimtyler2]

Hello there
I am new to java (5 months) and im trying to convert an arraylist with the Double (big D) data type into an array with a doubles data type (little d).

My array list is:
ArrayList<Double> grades = new ArrayList<Double>();

and in the program i am using the .add method to add doubles to it.

after that im trying to convert it into an array but im having a lot of trouble.
If anyone could help that would be great. Also im new so complicated programming code might confuse me.

Thanks,
cyimtyler2