Method tryParse

guava/src/com/google/common/primitives/Doubles.java:768–781

Parses the specified string as a double-precision floating point value. The ASCII character {@code '-'} (<code>'&#92;u002D'</code>) is recognized as the minus sign. <p>Unlike {@link Double#parseDouble(String)}, this method returns {@code null} instead of throwing an exception if parsing fails. Vali

(String string)

   * @since 14.0
   */
  @GwtIncompatible // regular expressions
  public static @Nullable Double tryParse(String string) {
    if (FLOATING_POINT_PATTERN.matcher(string).matches()) {
      // TODO(lowasser): could be potentially optimized, but only with
      // extensive testing
      try {
        return parseDouble(string);
      } catch (NumberFormatException e) {
        // Double.parseDouble has changed specs several times, so fall through
        // gracefully
      }
    }
    return null;
  }
}