Convert a String to Modified Camel Case in Java or Title Case as is otherwise called

Question

I want to convert any string to modified Camel case or Title case using some predefined libraries than writing my own functions.

For example "HI tHiS is SomE Statement" to "Hi This Is Some Statement"

Regex or any standard library will help me.

I found certain library functions in eclipse like STRING.toCamelCase(); is there any such thing existing?

Perhaps you mean [title case](http://en.wikipedia.org/wiki/Sentence_case#Title_case)? "[Camel case](http://en.wikipedia.org/wiki/CamelCase)" usually refers to things like "HiThisIsSomeStatement" (no delimiters between the words). — Ted Hopp, Jun 13 '13 at 02:47
Sorry I didn't know about title case. Thanks Ted Hopp. I want Title Case — takrishna, Jun 13 '13 at 03:34

score 24 · Answer 1 · edited Jan 30 '19 at 07:13

24

You can easily write the method to do that :

  public static String toCamelCase(final String init) {
    if (init == null)
        return null;

    final StringBuilder ret = new StringBuilder(init.length());

    for (final String word : init.split(" ")) {
        if (!word.isEmpty()) {
            ret.append(Character.toUpperCase(word.charAt(0)));
            ret.append(word.substring(1).toLowerCase());
        }
        if (!(ret.length() == init.length()))
            ret.append(" ");
    }

    return ret.toString();
}

edited Jan 30 '19 at 07:13

Yogesh Rathi

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answered Jun 13 '13 at 03:01

Florent Bayle

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Instead of `word.substring(0, 1).toUpperCase()` you could do `Character.toUpperCase(word.charAt(0))` – fge Jun 13 '13 at 04:42
@fge This is quite old comment but I want to know your thought process behind this. Can you please elaborate the difference between the two. – tez Jun 30 '22 at 03:22

score 24 · Accepted Answer · answered Jun 13 '13 at 03:38

I used the below to solve this problem.

import org.apache.commons.lang.StringUtils;
StringUtils.capitalize(MyString);

Thanks to Ted Hopp for rightly pointing out that the question should have been TITLE CASE instead of modified CAMEL CASE.

Camel Case is usually without spaces between words.

score 21 · Answer 3 · answered Jun 13 '13 at 03:03

21

From commons-lang3

org.apache.commons.lang3.text.WordUtils.capitalizeFully(String str)

answered Jun 13 '13 at 03:03

superEb

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Deprecated, replaced by org.apache.commons.text – aswzen Oct 10 '19 at 03:44

score 2 · Answer 4 · edited May 23 '17 at 12:10

Refer:

    static String toCamelCase(String s){
           String[] parts = s.split(" ");
           String camelCaseString = "";
           for (String part : parts){
               if(part!=null && part.trim().length()>0)
              camelCaseString = camelCaseString + toProperCase(part);
               else
                   camelCaseString=camelCaseString+part+" ";   
           }
           return camelCaseString;
        }

        static String toProperCase(String s) {
            String temp=s.trim();
            String spaces="";
            if(temp.length()!=s.length())
            {
            int startCharIndex=s.charAt(temp.indexOf(0));
            spaces=s.substring(0,startCharIndex);
            }
            temp=temp.substring(0, 1).toUpperCase() +
            spaces+temp.substring(1).toLowerCase()+" ";
            return temp;

        }
  public static void main(String[] args) {
     String string="HI tHiS is   SomE Statement";
     System.out.println(toCamelCase(string));
  }

This code throws an `StringIndexOutOfBoundsException` if there are two consecutive white-spaces in the `String` (or if the `String` is empty). It throws a `NullPointerException` if the `String` is null. — Florent Bayle, Jun 13 '13 at 03:20

Convert a String to Modified Camel Case in Java or Title Case as is otherwise called

4 Answers4