CODEWITHSUNDEEP
javaregexcamelcasing
Unni Kris
Unni Kris

Reputation: 3095

Regex to split Camel case - with Numbers

I want to split a camelCase name to individual names using regex, for performing a spell check.

The split should be as follows:

1) extendedStructureForNUB --> extended, Structure, For, NUB

2) extendedStructureFor2004 --> extended, Structure, For, 2004

Using the answer from the below question , i am able to split for the 1st condition.

Question : RegEx to split camelCase or TitleCase (advanced)

But for a string containing number (2nd condition), it is not returning as per format.

extendedStrctureFor2004 --> extended, Structure, For2004

Please suggest a way by which i can reuse this regex to split numerals also.

Upvotes: 1

Views: 2428

Answers (4)

Daren Schwenke
Daren Schwenke

Reputation: 5478

public static void main(String[] args) 
{     
    for (String w : "camelValue".split("(?<!(^|[A-Z0-9]))(?=[A-Z0-9])|(?<!^)(?=[A-Z][a-z])")) {
         System.out.println(w);
    } 
}

Edit: Correcting the case for UPPER2000UPPER the regex becomes:

public static void main(String[] args) 
{     
    for (String w : "camelValue".split("(?<!(^|[A-Z0-9]))(?=[A-Z0-9])|(?<!(^|[^A-Z]))(?=[0-9])|(?<!(^|[^0-9]))(?=[A-Za-z])|(?<!^)(?=[A-Z][a-z])")) {
         System.out.println(w);
    } 
}

Upvotes: 4

Pshemo
Pshemo

Reputation: 124235

What I see is answer from your previous question was almost pervect. If I ware you i would just add another split opperation, but this time before first digit in middle in each word.

Here is example:

String data="2Hello2000WORLDHello2000WORLD";
//your previois split
String[] myFirstSplit=data.split("(?<!(^|[A-Z]))(?=[A-Z])|(?<!^)(?=[A-Z][a-z])");

//I will store split results in list (I don't know size of array)
List<String> list=new ArrayList<>();
for (String s:myFirstSplit){
    //if splited word contains digit after letter then split
    for (String tmp:s.split("(?<=[a-zA-Z])(?=[0-9])"))
        list.add(tmp);
}
System.out.println(list);
//out [2, Hello, 2000, WORLD, Hello, 2000, WORLD]

Upvotes: 1

Vitaly Dyatlov
Vitaly Dyatlov

Reputation: 1872

public static void main(String[] args)
{
    for (String w : "extended2004FeeStructure".split("(?<!(^|[A-Z0-9]))(?=[A-Z0-9])|(?<!^)(?=[A-Z][a-z])")) {
        System.out.println(w);
    }
}

corrected one

Upvotes: 1

Kabilan S
Kabilan S

Reputation: 1094

After you seperate this

extendedStrctureFor2004 --> extended, Structure, For2004

Store it in some array like "arr"

Use this Regex

var numberPattern = /[0-9]+/g; var numMatch= arr[i].match(numberPattern);

now numMatch will contain the numerals u want..

Upvotes: 0

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