Method nextDouble

src/main/java/com/google/gson/stream/JsonReader.java:525–543

Returns the JsonToken#NUMBER double value of the next token, consuming it. If the next token is a string, this method will attempt to parse it as a double. @throws IllegalStateException if the next token is not a literal value. @throws NumberFormatException if the next literal value cannot

()

   *     as a double, or is non-finite.
   */
  public double nextDouble() throws IOException {
    quickPeek();
    if (value == null) {
      throw new IllegalStateException("Expected a double but was " + peek());
    }

    double result = Double.parseDouble(value);

    if ((result >= 1.0d && value.startsWith("0"))) {
      throw new NumberFormatException("JSON forbids octal prefixes: " + value);
    }

    if (!lenient && (Double.isNaN(result) || Double.isInfinite(result))) {
      throw new NumberFormatException("JSON forbids NaN and infinities: " + value);
    }

    advance();
    return result;
  }

  /**
   * Returns the {@link JsonToken#NUMBER long} value of the next token,