Is there any pretty and flexible way to format String data into specific pattern, for example:
data input -> 0123456789
data output <- 012345/678/9
I did it by cutting String into multiple parts, but I'm searching for any more suitable way.
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3Post your attemptReimeus– Reimeus2018-04-23 17:53:12 +00:00Commented Apr 23, 2018 at 17:53
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3 Answers
Assuming you want the last and 4th-2nd last in groups:
String formatted = str.replaceAll("(...)(.)$", "/$1/$2");
This captures the parts you want in groups and replaces them with intervening slashes.
Comments
You can use replaceAll with regex to match multiple groups like so :
String text = "0123456789";
text = text.replaceAll("(\\d{6})(\\d{3})(.*)", "$1/$2/$3");
System.out.println(text);
Output
012345/678/9
details
(\d{6})group one match 6 digits(\d{3})group two match 3 digits(.*)group three rest of your string$1/$2/$3replace with the group 1 followed by/followed by group 2 followed by/followed by group 3
Comments
You can use StringBuilder's insert to insert characters at a certain index:
String input = "0123456789";
String output = new StringBuilder(input)
.insert(6, "/")
.insert(10, "/")
.toString();
System.out.println(output); // 012345/678/9
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