ReplaceAll replaces only first occurance of substring

Question

I would like to replace " inside first brackets with '. Substring inside second brackets should remain unchanged. Example:

String test = "(\"test1\", \"test2\") (\"test3\", \"test4\")"; //wanted output is ('test1', 'test2') ("test3", "test4")
String regex = "(^[^\\)]*?)\"(.*?)\"";
test = test.replaceAll(regex, "$1'$2'");
System.out.println(test); // output is ('test1', "test2") ("test3", "test4")
test = test.replaceAll(regex, "$1'$2'");
System.out.println(test); // output is ('test1', 'test2') ("test3", "test4")

Why " around test2 are not replaced during first call of replaceAll?

Answer 1

This is the good use-case to use boundary matcher \G:

String test = "(\"test1\", \"test2\") (\"test3\", \"test4\")";
final String regex = "(^\\(|\\G(?!^),\\h*)\"([^\"]+)\"";

test = test.replaceAll(regex, "$1'$2'");
System.out.println(test);
//=> ('test1', 'test2') ("test3", "test4")

\G asserts position at the end of the previous match or the start of the string for the first match

RegEx Demo