Java split regex patten letters and numbers

Question

I want to split this regexp pattern 2 numbers-3 numbers-5 numbers and letter in two part. Numbers and "-" one array and the letters in the second array.

I been trying to figure it out for a while. Hoping I can get some help.

Here is an example

"12-123-12345A"    <----- the string 
// I want to split it such that it can be ["12-123-12345","A"]

I tried this

"\\d{2}-\\d{3}-\\d{5}" 
// that only give me ["", "A"]

and this

"(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)"
// ["12", "-", "123", "-", "12345", "A"]

falsetru · Accepted Answer · 2014-02-27 07:20:58Z

4

\D matches any non-digit character (including -). You'd better to use [^-\d] instead to exclude -.

String s = "12-123-12345A";
String parts[] = s.split("(?<=\\d)(?=[^-\\d])");
System.out.println(parts[0]); // 12-123-12345
System.out.println(parts[1]); // A

See a demo: http://ideone.com/emr1Kq

answered Feb 27, 2014 at 7:20

falsetru

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7 Comments

AirWick219 Over a year ago

That work really well but I was wondering if i can restrict the format ? so "12-123-123A" will not make the split and just return an empty array.

falsetru Over a year ago

@AirWick219, It seem like Matcher.find is more appropriate for you. See this: ideone.com/fsmvnE

AirWick219 Over a year ago

Matcher would be great but split also is accounting for "12-123-12345" without the letter in this case I want it to return just ["12-123-12345"]

AirWick219 Over a year ago

Thank you so much... Learned alot.. so i am guess "?" means optional. how about if the end letter is not just one but it can add on..."12-123-12345A" or "12-123-12345AA" or "12-123-12345Aaaaaa". like split letters and "-" to be group(1) and all the letters to be in group(2)

falsetru Over a year ago

@AirWick219, Yes it is. It matches zero or one match of preceding part => optional

|

Evgeniy Dorofeev · Accepted Answer · 2014-02-27 07:20:58Z

1

try this

String[] a = "12-123-12345A".split("(?<=\\d)(?=\\p{Alpha})");

answered Feb 27, 2014 at 7:20

Evgeniy Dorofeev

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Comments

jcalloway · Accepted Answer · 2014-02-27 15:02:47Z

0

(\d{2}-\d{3}-\d{5})(\w)

You can test it on this website

http://regexpal.com/

Here's the java code. note double slash in replace of slash \ --> \\

package com.company;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

// http://stackoverflow.com/questions/22061614
public class Main {

    public static void main(String[] args) {
      Pattern regex = Pattern.compile("(\\d{2}-\\d{3}-\\d{5})(\\w)");
      Matcher matcher = regex.matcher("12-123-12345A");
      matcher.find();
      System.out.println(matcher.group(1));
      System.out.println(matcher.group(2));
    // write your code here
    }
}

edited Feb 27, 2014 at 15:02

answered Feb 27, 2014 at 8:19

jcalloway

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2 Comments

AirWick219 Over a year ago

I initially got a match for "^\d{2}-\d{3}-\d{5}" but i guess in java it's different ??

jcalloway Over a year ago

@AirWick219 Guess in java you need to make single slash into double slash. I added the code above

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