Counting Group of Words and Searching a Word in java

Counting Group of Words

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class MatcherGroupCountExample 

{

   public static void main(String args[]) 

   {

      Pattern p = Pattern.compile("J(ava)");

      String candidateString = "This is Java.

      This is a Java example.";

      Matcher matcher = p.matcher(candidateString);

      int numberOfGroups = matcher.groupCount();

      System.out.println("numberOfGroups =" + numberOfGroups);

   }

}

Searching a Word

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class Main 

{

   public static void main(String args[]) 

  {

      Pattern p = Pattern.compile("j(ava)");

      String candidateString = "This is a java program. 

      This is another java program.";

      Matcher matcher = p.matcher(candidateString);

      int nextIndex = matcher.start(1);

      System.out.println(candidateString);

      System.out.println("The index for java is:" + nextIndex);

   }

}