Thread: Replace bracket

Hi guys, i have this text:

com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: 
Cannot add or update a child row: a foreign key constraint fails 
(`sita4`.`control`, CONSTRAINT `reffinalit` FOREIGN KEY 
(`finalit`) REFERENCES `finalit` (`cod`) ON DELETE NO ACTION ON UPDATE NO ACTION)

and i want take the field that have send foreign key in this case "finalit", i have make this code:

[B]int beginIndex = msgerror[0].indexOf("FOREIGN KEY");
int endIndex = msgerror[0].indexOf("REFERENCES");
String field = msgerror[0].substring(beginIndex,endIndex);
field = field.replaceAll("FOREIGN KEY", "");
field = field.replaceAll(" *\\(`\\d+`\\)*", ""); \\this not work
and field is = ('finalit')[/B]

why replaceall not work on bracket?
Thanks.