What is the result(pattern matching)? : Questions « Utility Classes « SCJP

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

public class MainClass {
  public static void main(String[] args) {
    Pattern p = Pattern.compile("\\d+");
    Matcher m = p.matcher("ab2c4d67");
    int count = 0;
    while (m.find())
      count++;
    System.out.print(count);
  }
}