iList<<Escape>                   /* insert List< */
~                                /* upper case d to D */
yiw                              /* yank Double */
wx                               /* delete [ */
r>                               /* overwrite ] with > */
A new ArrayList<>();<Escape>     /* append text */
F<                               /* find backwards */
"0p
                                 /* paste from yank register */
jdd                              /* delete { line */
3J                               /* join data on single line */
qa                               /* start macro recording */
f,i)<Escape>                     /* insert ) before comma */
q                                /* stop macro recording */
@a                               /* replay macro */
@@@@@@@@@@@@@@                   /* again (TODO: count for macro replay, make @ repeatable) */