[primitive data type] double [wrapper class] Double [arguments for constructor] 
double or String
b o o l e a n o r S t r i n g
b y t e o r S t r i n g
c h a r
d o u b l e o r S t r i n g
f l o a t , d o u b l e o r S t r i n g
i n t o r S t r i n g
l o n g o r S t r i n g
s h o r t o r S t r i n g
v o i d