Method nextString

src/main/java/com/google/gson/stream/JsonReader.java:459–468

Returns the JsonToken#STRING string value of the next token, consuming it. If the next token is a number, this method will return its string form. @throws IllegalStateException if the next token is not a string or if this reader is closed.

()

   *     this reader is closed.
   */
  public String nextString() throws IOException {
    peek();
    if (value == null || (token != JsonToken.STRING && token != JsonToken.NUMBER)) {
      throw new IllegalStateException("Expected a string but was " + peek());
    }

    String result = value;
    advance();
    return result;
  }

  /**
   * Returns the {@link JsonToken#BOOLEAN boolean} value of the next token,