Java - Better way to split a string into just one array

Question

I only want the first element from s.split(",") and I need to return value to be in a String array.

How can I make this code a one liner?

String [] sd = s.split(",");
String [] sf = new String[]{sd[0]};

I tried s.split(",",1); but it just adds it all to the first element without actually splitting it.

So you want a String array where the first element is the substring of s from 0 to the index of the first occurrence of , right? Why not String sd[] = {s.split(",")} — Arc676
– Arc676, Commented Nov 5, 2015 at 14:32
Because only the first element is desired. Yes it is easy to get the first element from that but the OP wants it in one line :) — Mark Sholund
– Mark Sholund, Commented Nov 5, 2015 at 14:37
Just append the second line to the first line without a newline inbetween and you've got your one-liner! — fabian
– fabian, Commented Nov 5, 2015 at 14:38

Eran · Accepted Answer · 2015-11-05 14:32:49Z

9

You can use

String [] sf = {sd.substring(0,sd.indexOf(','))};

If you only need the first token of the comma separated String, using substring and indexOf would be more efficient than split.

Of course this code will throw an exception if the input String doesn't contain a ','.

answered Nov 5, 2015 at 14:32

Eran

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Comments

Mark Sholund · Accepted Answer · 2015-11-05 14:33:30Z

9

String [] sf = new String[]{s.split(",")[0]};

answered Nov 5, 2015 at 14:33

Mark Sholund

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Jean Logeart · Accepted Answer · 2015-11-05 14:39:01Z

1

If you have Apache Commons Lang, you can simply use substringBefore:

String[] sf = { StringUtils.substringBefore(s, ",") };

answered Nov 5, 2015 at 14:39

Jean Logeart

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