How do I capitalize the first letter of a string if it is not one already?

Question

I need to convert the first letter of a String into a Capital if it is not already one for part of a project of mine. Can anyone help me please?

Please share what you have tried or done. – ritesh Mar 20 '14 at 05:41 — ritesh, Mar 20 '14 at 05:41

score 1 · Answer 1 · edited Mar 20 '14 at 05:55

1

Try using this,

  String str= "haha";
  str.replaceFirst("\\w", str.substring(0, 1).toUpperCase());

edited Mar 20 '14 at 05:55

Sahil Mahajan Mj

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answered Mar 20 '14 at 05:28

Vivek

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score 0 · Answer 2 · answered Mar 20 '14 at 05:26

0

Try this

String s = "this is my string";
s.substring(0,1).toUpperCase();

answered Mar 20 '14 at 05:26

Sergey Pekar

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score 0 · Answer 3 · answered Mar 20 '14 at 05:35

In Java, this replaces every alpha-numeric word (plus underscores) so its first character is uppercase:

Matcher m = Pattern.compile("\\b([a-z])(\\w+)").matcher(str);

StringBuffer bfr = new StringBuffer();
while(m.find())  {
   m.appendReplacement(bfr,
      m.group(1).toUpperCase() + "$2");
}
m.appendTail(bfr);

It does not alter words that are already uppercased.

How do I capitalize the first letter of a string if it is not one already?

3 Answers3