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I want to place a dash after every letter but my regex place a dash at the end too. How can I improve my regex?
String outputS = dnaString.replaceAll("(.{1})", "$1-");
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To match any character except a list of excluded characters, put the excluded charaters between [^ and ] . The caret ^ must immediately follow the [ or else it stands for just itself. The character '. ' (period) is a metacharacter (it sometimes has a special meaning).
Example: The regex "aa\n" tries to match two consecutive "a"s at the end of a line, inclusive the newline character itself. Example: "a\+" matches "a+" and not a series of one or "a"s. ^ the caret is the anchor for the start of the string, or the negation symbol. Example: "^a" matches "a" at the start of the string.
Matching a Single Character Using Regex By default, the '. ' dot character in a regular expression matches a single character without regard to what character it is. The matched character can be an alphabet, a number or, any special character.
(.)(?!$)
You can use this.Replace by $1.See demo.
https://regex101.com/r/gT6vU5/11
(?!$) uses negative lookahead to state that do not capture a character which is at end of string.
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