Separate a string,java with regex

Question

I want to separate a string but to keep separators except space.

Also I'd like to not separate words like asda45a or asd6ad.

this is the list of separators:

private static String delimits="[{;}(),#<>*+-=/ ]+";

I tried String[] List = o.split("(?<="+delimits+")|(?="+delimits+")");

Could you provide a sample of a full string you would use this on? — Matthew Wright
– Matthew Wright, Commented Nov 6, 2016 at 14:16

Wiktor Stribiżew · Accepted Answer · 2016-11-06 15:11:22Z

1

You need to adjust your delimits pattern to exclude the space (since you do not want to keep space delimiters in the result) and put the - at the end of the character class as in your expression it forms a range between + and =. Then, just add an | + alternative to the main regex:

String delimits="[{;}(),#<>*+=/-]+";
String o = "asda45a or-ro asd6ad";
String[] lst = o.split("(?<="+delimits+")|(?="+delimits+")| +");
System.out.println(Arrays.toString(lst));
// => [asda45a, or, -, ro, asd6ad]

See the online Java demo

If you want to split with any whitespace, replace | + with |\\s+.

answered Nov 6, 2016 at 15:11

Wiktor Stribiżew

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