Java Proper Case - Revision history

Egge at 00:19, 19 October 2009

2009-10-19T00:19:17Z

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	[[Category:Ruby\|Proper Case]]		[[Category:Ruby\|Proper Case]]
			[[Category:Regex\|Proper Case]]

Brianegge at 01:05, 17 September 2009

2009-09-17T01:05:22Z

← Older revision		Revision as of 01:05, 17 September 2009
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	You'll want to make the Pattern static if you anticipate calling this function a number of times.		You'll want to make the Pattern static if you anticipate calling this function a number of times.

			In Ruby, you can do the same thing like this:

			<geshi lang="ruby">
			"fOo BAR".downcase.gsub(/\b\w/){$&.upcase}
			=> "Foo Bar"
			</geshi>

	[[Category:Java\|Proper Case]]		[[Category:Java\|Proper Case]]
			[[Category:Ruby\|Proper Case]]

Egge: New page: A quick search on how to proper case or title case a Java string returned a number way to approach this problem. In C/assembly you can do the replacement in place, and very fast using bit...

2008-10-01T07:31:28Z

New page: A quick search on how to proper case or title case a Java string returned a number way to approach this problem. In C/assembly you can do the replacement in place, and very fast using bit...

New page

A quick search on how to proper case or title case a Java string returned a number way to approach this problem. In C/assembly you can do the replacement in place, and very fast using bitmasks.

None of the Java solutions I found used the regular expression library. The Java regex library is quite good IMHO, and I tend to attempt to use it whenever I'm performing string operations. The results are usually faster and more concise than a hand written loop. Here's my function to proper case a string:

<geshi lang="java5">
static String properCase(String s) {
Pattern p = Pattern.compile("(^|\\W)([a-z])");
Matcher m = p.matcher(s.toLowerCase());
StringBuffer sb = new StringBuffer(s.length());
while(m.find()) {
m.appendReplacement(sb, m.group(1) + m.group(2).toUpperCase() );
}
m.appendTail(sb);
return sb.toString();
}
</geshi>

And here's a basic unit test:

<geshi lang="java5">
public void testProperCase() throws Exception {
assertEquals("Foo Bar", properCase("fOo baR"));
}
</geshi>

You'll want to make the Pattern static if you anticipate calling this function a number of times.

[[Category:Java|Proper Case]]