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Updated on 2025-04-07

The difference between optString and getString methods in JSON

The difference between optString and getString methods in JSON

Updated: July 7, 2017 15:18:24   Submission: mrr
The optString method will return an empty string when the value in the corresponding key does not exist, but getString will throw a JSONException. The following is a code to introduce the difference between optString and getString methods in JSON. Interested friends can take a look.

The optString method will return an empty string when the value in the corresponding key does not exist, but getString will throw a JSONException.

 /**
   * Returns the value mapped by {@code name} if it exists, coercing it if
   * necessary, or throws if no such mapping exists.
   *
   * @throws JSONException if no such mapping exists.
   */
  public String getString(String name) throws JSONException {
    Object object = get(name);
    String result = (object);
    if (result == null) {
      throw (name, object, "String");
    }
    return result;
  }
  /**
   * Returns the value mapped by {@code name} if it exists, coercing it if
   * necessary, or the empty string if no such mapping exists.
   */
  public String optString(String name) {
    return optString(name, "");
  }

The above is the difference between optString and getString methods in JSON introduced to you by the editor. I hope it will be helpful to you. If you have any questions, please leave me a message and the editor will reply to you in time. Thank you very much for your support for my website!

  • json
  • optString
  • getString

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