java - Deletion in a regex -

i split problem more easy me :

for expression :

"created":"589c8377576a33706397f3f4"  

i write regex :

output_row.json.replaceall("\"created\":\"589c8377576a33706397f3f4\"",""); 

it works ! use dynamic token e.g. [[:xdigit:]].

i try didn't work !

output_row.json.replaceall("\"created\":\"[[:xdigit:]]\"","");  

could advice me, please ?

[[:xdigit:]] 1 hex digit. add + quantifier match 1 n, or * match 0 n hex digits.