Share on Google+Share on Google+

Word Count

Here providing you an example that counts the number of occurrences of a specific word in a string.

Word Count


This example counts the number of occurrences of  a specific word in a string. Here we are counting the occurrences of word "you" in a string. To count it we are using countMatches() method.

The org.apache.commons.lang.StringUtils class extends the Object class and defines certain words related to String handling such as null for null,"" for a zero-length string, ' ' for space characters, Charecter.isWhitespace(char) for whitespace and String.trim() for trim. The StringUtils class handles null input strings.

The method used:

countMatches(String str,String sub): This method counts how many times the string sub appears in the String str. This method returns zero if  StringUtils.countMatches(null, *), StringUtils.countMatches("", *) ,StringUtils.countMatches("abba", null),StringUtils.countMatches("abba", "") , and StringUtils.countMatches("abba", "x"). The parameters used  as "str" is String to be checked and "sub" is substring to be count.

 The code of the program is given below:

import org.apache.commons.lang.StringUtils;
public class WordCountExample 
  public static void main(String[] args)
  String string = "How r you?R you fine?Where are you going?";  
" occurrences of the word 'you' in '" + string +
  "' is found.");

The output of the program is given below:

C:\rajesh\kodejava>java WordCountExample
3 occurrences of the word 'you' in 'How r you?R you fine?
Where are you going?' is found.

Download this example



Posted on: July 6, 2007 If you enjoyed this post then why not add us on Google+? Add us to your Circles

Share this Tutorial Follow us on Twitter, or add us on Facebook or Google Plus to keep you updated with the recent trends of Java and other open source platforms.

Discuss: Word Count   View All Comments

Post your Comment

Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image
October 1, 2012

Code to count occurrences of a specific character in a String. Input Input consists of single string followed by a character in next line. Output The output will be the number of occurrence of that character. Example Input: welcome to codingfingers. e Output: 3