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String conversion from UPPERCASE to Title Case

Posted on 2004-08-03
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Last Modified: 2008-01-09
I'm very new to JSP, i'm in a situation where i have to convert UPPERCASE string to Title Case.

Is there any Java function for this? or any other way to perform this job.
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Question by:adnanj76
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by:TimYates
ID: 11704082
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by:TimYates
ID: 11704381
Actually that same thing is now part of the jakarta taglibs:

http://jakarta.apache.org/taglibs/

it's the "String" one

Actually that is a taglib wrapper round the Apache Commons "lang" package

http://jakarta.apache.org/commons/lang/

org.apache.commons.lang.WordUtils.capitalizeFully( String s )

Tim
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by:sompol_kiatkamolchai
ID: 11705293
If Tim have already answer your question, skip this comment.

>>UPPERCASE string to Title Case.
Could you give me and example?

"UPPER CASE" --> UpperCase

Do you mean something like this?
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by:TimYates
ID: 11705317
No, like:

"THIS IS A COOL STRING"

to

"This Is A Cool String"

I think :-)
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by:TimYates
ID: 11705327
The code in Apache commons is:
----------------------
    /**

     * <p>Capitalizes all the whitespace separated words in a String.

     * All letters are changed, so the resulting string will be fully changed.</p>

     *

     * <p>Whitespace is defined by {@link Character#isWhitespace(char)}.

     * A <code>null</code> input String returns <code>null</code>.

     * Capitalization uses the unicode title case, normally equivalent to

     * upper case.</p>

     *

     * <pre>

     * WordUtils.capitalize(null)        = null

     * WordUtils.capitalize("")          = ""

     * WordUtils.capitalize("i am FINE") = "I Am Fine"

     * </pre>

     *

     * @param str  the String to capitalize, may be null

     * @return capitalized String, <code>null</code> if null String input

     */

    public static String capitalizeFully(String str) {

        int strLen;

        if (str == null || (strLen = str.length()) == 0) {

            return str;

        }

        StringBuffer buffer = new StringBuffer(strLen);

        boolean whitespace = true;

        for (int i = 0; i < strLen; i++) {

            char ch = str.charAt(i);

            if (Character.isWhitespace(ch)) {

                buffer.append(ch);

                whitespace = true;

            } else if (whitespace) {

                buffer.append(Character.toTitleCase(ch));

                whitespace = false;

            } else {

                buffer.append(Character.toLowerCase(ch));

            }

        }

        return buffer.toString();

    }
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by:TimYates
ID: 11705332
Bizzarre double spaces...  sorry about that... :-(
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by:sompol_kiatkamolchai
ID: 11705396
If so, you can use this code.

TitleCase.jsp
========
<%!
private String toTitleCase(String str) {
      String[] tokens = str.split(" ");  
        StringBuffer sb = new StringBuffer();
        for(int i=0; i<tokens.length; i++) {
          sb.append(tokens[i].substring(0,1).toUpperCase());
          sb.append(tokens[i].toLowerCase().substring(1));
        }
        return sb.toString();
}
%>
<html>
<head>
<title>TitleCase</title>
</head>
<body bgcolor="#ffffff">
<%=toTitleCase("THIS IS THE TEST.")%>
</body>
</html>
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by:sompol_kiatkamolchai
ID: 11705438
If you mean like Tim, this may be shorter

TitleCase.jsp
========
<%!
private String toTitleCase(String str) {
      String[] tokens = str.split(" ");  
        StringBuffer sb = new StringBuffer();
        for(int i=0; i<tokens.length; i++) {
          sb.append(tokens[i].substring(0,1).toUpperCase());
          sb.append(tokens[i].toLowerCase().substring(1));
          sb.append(" ");
        }
        return sb.toString();
}
%>
<html>
<head>
<title>TitleCase</title>
</head>
<body bgcolor="#ffffff">
<%=toTitleCase("THIS IS THE TEST.")%>
</body>
</html>
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by:TimYates
ID: 11705469
I think Character.toTitleCase() may be better than toUpperCase() not sure though
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by:sompol_kiatkamolchai
ID: 11705591
Yes. Tim. You're right.
For performance purpose. If we have a very long string, we can see the different.
But If this application is just showing the string legth < 100 character, I think we could not feel the difference.

I just want to share idea. :)
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by:sompol_kiatkamolchai
ID: 11705613
Your code have a good performance while my code have a good readability. I think so. :)
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Accepted Solution

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sompol_kiatkamolchai earned 125 total points
ID: 11705657
I think the time that this code use compare to the time that SQL query making. I think it is very different.
toTitleCase may use 10 ms while statement.executeQuery may use 10 sec.

Anyway your code look well.
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Expert Comment

by:TimYates
ID: 12517229
Did I not help at all then adnanj76  :-(

Sorry about that...
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