Java String replace all words

public class Main {
  public static void main(String[] args) {
    String firstString = "This sentence ends in 5 stars *****";
     //www  .j av  a2s  . co m
    System.out.printf("Original String 1: %s\n", firstString);

    // replace words with 'word'
    System.out.printf("Every word replaced by \"word\": %s\n\n",
       firstString.replaceAll("\\w+", "____"));

  }
}