java regex examples find number of hits

RegexExampleNumberOfHits.java

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexExampleNumberOfHits {
  public static void main(String[] args) {
    String txt = "dfsd weqwe asdasdw und \nsch\nqschwexs xsdad\nschaber\n\reewwww dxddasdfsf\n\rsch\n\r dfsgfgd bieeewwwww";

    // word content
    Matcher matchSentence = Pattern.compile("sch", Pattern.CASE_INSENSITIVE).matcher(txt);
    int hits = 0;
    while (matchSentence.find()) {
      hits++;
    }
    System.out.println("hits: " + hits); //4

    // word beginning
    matchSentence = Pattern.compile("\\bsch", Pattern.CASE_INSENSITIVE).matcher(txt);
    hits = 0;
    while (matchSentence.find()) {
      hits++;
    }
    System.out.println("hits: " + hits); //3

    // exact word
    matchSentence = Pattern.compile("\\bsch\\b", Pattern.CASE_INSENSITIVE).matcher(txt);
    hits = 0;
    while (matchSentence.find()) {
      hits++;
    }
    System.out.println("hits: " + hits);  //2
  }
}