Boyer 1.5

Fast string search (indexOf) using the Boyer-Moore algorithm.

Developer:

Canadian Mind Products

License:

Freeware

OS:

Windows 98 / ME / 2000 / XP / 2003 / Vista / Unix / Linux / Mac OS X / Mac OS Other

Requirements:

Java 1.1+

Price:

Free
Price is subject to change at any time by the company

Date added:

4/1/2009

Last Update:

6/16/2007

User Rating:

Not yet rated.

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Fast string search (indexOf) using the Boyer-Moore
algorithm. Incorporate this class into your own Java
programs to rapidly search strings.

use:
import com.mindprod.Boyer.Boyer;
...
Boyer b = new Boyer("dogcatwombat");
int where = b.indexOf("cat");
or
int where = Boyer.indexOf("dogcatwombat","cat");

Boyer-Moore is about twice as fast as String.indexOf when
the string you are searching in is 2K or over and the
pattern you are searching for is 4 characters or longer.

String.indexOf is particularly slow when the pattern begins
with a common letter such as "e". Boyer-Moore is fastest
when the pattern is long and composed only of uncommon
letters, e.g. "z" or "^". If you use a char[] instead of
String for your text to be searched, it will run an
additional 33% faster.

Boyer automatically reverts to String.indexOf when that
would be faster.

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