split a string but dont split when character repeats java

Question

How can I split a string, but when a character repeats, don`t split?

Like:

String a = "aHHHbYY";
String[] b = a.split("");

But I don't want to split every letter just the ones that don`t repeat.

Output would be like:

["a", "HHH", "b", "YY"]

use a for loop, that will make things easier – Mar 02 '17 at 12:42 — , Mar 02 '17 at 12:42
Specify you question, before publishing. – GensaGames Mar 02 '17 at 18:50 — GensaGames, Mar 02 '17 at 18:50

score 0 · Answer 1 · edited May 23 '17 at 12:00

0

Your Problem can be solved easily with regular expressions. This could look like this:

String regex = "(?<=(.))(?!\\1)";
String a = "aHHHbYY";
String[] b = a.split(regex);

This gives the exact output you want. If you want a more detailed answer, take a look at this post:

edited May 23 '17 at 12:00

Community

answered Mar 02 '17 at 13:50

Pascal Schneider

If your problem is solved, I would appreciate if you could accept this answer – Pascal Schneider Mar 02 '17 at 14:13

score -1 · Answer 2 · edited Mar 03 '17 at 16:03

-1

You can use regular expressions as a solution. Here is a example for splitting and separating the chars and removing duplicates.

String input = "aHHHbYY";
String[] result = input.replaceAll("(.)\\1{1,}", "$1").split("");

will get you:

["a", "H", "b", "Y"]

edited Mar 03 '17 at 16:03

Stephen Rauch

answered Mar 02 '17 at 12:44

GensaGames

1

In general, regular expressions aren't that easy to read and understand. But anyway it's always welcome to add some description to your answer. Apart from this, your `result` is `["a", "H", "b", "Y"]`, but the OP wants the array to be `["a", "HHH", "b", "YY"]` – Pascal Schneider Mar 02 '17 at 13:31
@PascalSchneider Question was updated, after I answered. Lol. – GensaGames Mar 02 '17 at 17:18
If you take a look at the history of the post, my comment still applies. – Pascal Schneider Mar 02 '17 at 18:54

2 Answers2