Returning overlapping regular expressions
Is there a regular expression that will capture all instances of an expression, regardless of whether or not they overlap?
E.g. in /abc/def/ghi if I want to capture all strings beginning with /. The regex (/.*) only returns the entire string, but I'd want it to match on /def/ghi and /ghi as well.
Solution 1:
Sure, match an empty string and place a look-ahead after it that captures /.* in a capturing group:
Matcher m = Pattern.compile("(?=(/.*))").matcher("/abc/def/ghi");
while(m.find()) {
System.out.println(m.group(1));
}
would print:
/abc/def/ghi
/def/ghi
/ghi