Count the number of instances of substring within a string : String substring « Data Type « Java
Count the number of instances of substring within a string
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*
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* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
public class Main{
/////////////////////////////////////////////////////////////////////////
// Counting Methods //
/////////////////////////////////////////////////////////////////////////
/**
* Count the number of instances of substring within a string.
*
* @param string String to look for substring in.
* @param substring Sub-string to look for.
* @return Count of substrings in string.
*/
public static int count(final String string, final String substring)
{
int count = 0;
int idx = 0;
while ((idx = string.indexOf(substring, idx)) != -1)
{
idx++;
count++;
}
return count;
}
/**
* Count the number of instances of character within a string.
*
* @param string String to look for substring in.
* @param c Character to look for.
* @return Count of substrings in string.
*/
public static int count(final String string, final char c)
{
return count(string, String.valueOf(c));
}
}
