java string.split function

Question

Str = "abc|def|ghi^jkl|mno";
String[] Flds = Str.split("[|]"); 
//Flds[0] = "abc";
//Flds[1] = "def";
//Flds[2] = "ghi^jkl";
//Flds[3] = "mno";

now I want to know the sub fields for Flds[2], but none of the following are working -

String[] Flds = Str.split("[^]");

String[] Flds = Str.split("[^]]");

String[] Flds = Str.split("^");

Ehm, you are trying to split Str again, not Flds[2]

The Unfun Cat
– The Unfun Cat

2012-11-09 23:05:42 +00:00
Commented Nov 9, 2012 at 23:05 — The Unfun Cat
– The Unfun Cat, Commented Nov 9, 2012 at 23:05

Mike Park · Accepted Answer · 2012-11-09 23:13:08Z

5

You should be splitting Flds[2]

String[] subFlds2 = Flds[2].split("\\^");

Also, ^ is a reserved character in regular expressions. You used [] to escape |, however, ^ also means something inside the [] brackets.

edited Nov 9, 2012 at 23:13

answered Nov 9, 2012 at 23:07

Mike Park

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1 Comment

Pshemo Over a year ago

+1 To be more precise [] with ^ placed as first character is Negated Character Class for example [^bc] means every character besides b or c.

Daniel F. Thornton · Accepted Answer · 2012-11-09 23:08:34Z

1

Double escape the carat:

Flds[2].split("\\^")

One escape for Java, then another for the regex.

answered Nov 9, 2012 at 23:08

Daniel F. Thornton

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Comments

Yogendra Singh · Accepted Answer · 2012-11-09 23:18:26Z

0

Please note: String#split,accepts the parameter which is regular expression:

  public String[] split(String regex)

^ is special character in regex, which means beginning of the line. To use it as literal, please use a escape char before it e.g. below:

String[] Flds = Str.split("[\\^]");

Also I think, it should work fine without braces e.g.

String[] Flds = Str.split("\\^");

You may find more about regular expression character classes here: Regex Char Classes

edited Nov 9, 2012 at 23:18

answered Nov 9, 2012 at 23:12

Yogendra Singh

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