Brianegge: Created page with 'Regex functions can give you fast replacements in Java, along with the readability of Perl. Here's an example of using a replaceAll to mask out certain digits in a credit card n…'

2009-10-09T02:40:11Z

Created page with 'Regex functions can give you fast replacements in Java, along with the readability of Perl. Here's an example of using a replaceAll to mask out certain digits in a credit card n…'

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Regex functions can give you fast replacements in Java, along with the readability of Perl. Here's an example of using a replaceAll to mask out certain digits in a credit card number.

<geshi lang="java5">
String account = "1234567890123456";
String replacement = account.replaceAll("(\\d{4})(\\d{2})(\\d{6})(\\d{4})", "$1 $2XX XXXX $4");
assertEquals("1234 56XX XXXX 3456", replacement);
</geshi>

Another fun regex can simulate the the unix 'basename' function.

<geshi lang="java5">
assertEquals("RegexTest", this.getClass().getName().replaceAll("(?:\\w+\\.)*(\\w+)", "$1"));
</geshi>

[[Category:Java]]
[[Category:Regex]]

ReplaceAll with Backreferences - Revision history

Brianegge: Created page with 'Regex functions can give you fast replacements in Java, along with the readability of Perl. Here's an example of using a replaceAll to mask out certain digits in a credit card n…'