本文整理了Java中org.json.JSONObject.optEnum()方法的一些代码示例，展示了JSONObject.optEnum()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。JSONObject.optEnum()方法的具体详情如下：
包路径：org.json.JSONObject
类名称：JSONObject
方法名：optEnum

JSONObject.optEnum介绍

[英]Get the enum value associated with a key.
[中]

代码示例

代码示例来源：origin: loklak/loklak_server

/**
 * Get the enum value associated with a key.
 * 
 * @param clazz
 *            The type of enum to retrieve.
 * @param key
 *            A key string.
 * @return The enum value associated with the key or null if not found
 */
public <E extends Enum<E>> E optEnum(Class<E> clazz, String key) {
  return this.optEnum(clazz, key, null);
}

代码示例来源：origin: loklak/loklak_server

/**
* Get the enum value associated with a key.
* 
* @param clazz
*           The type of enum to retrieve.
* @param key
*           A key string.
* @return The enum value associated with the key
* @throws JSONException
*             if the key is not found or if the value cannot be converted
*             to an enum.
*/
public <E extends Enum<E>> E getEnum(Class<E> clazz, String key) throws JSONException {
  E val = optEnum(clazz, key);
  if(val==null) {
    // JSONException should really take a throwable argument.
    // If it did, I would re-implement this with the Enum.valueOf
    // method and place any thrown exception in the JSONException
    throw new JSONException("JSONObject[" + quote(key)
        + "] is not an enum of type " + quote(clazz.getSimpleName())
        + ".");
  }
  return val;
}

代码示例来源：origin: b3log/latke

/**
 * Get the enum value associated with a key.
 * 
 * @param <E>
 *            Enum Type
 * @param clazz
 *            The type of enum to retrieve.
 * @param key
 *            A key string.
 * @return The enum value associated with the key or null if not found
 */
public <E extends Enum<E>> E optEnum(Class<E> clazz, String key) {
  return this.optEnum(clazz, key, null);
}

代码示例来源：origin: b3log/latke

/**
 * Get the enum value associated with a key.
 * 
 * @param <E>
 *            Enum Type
 * @param clazz
 *           The type of enum to retrieve.
 * @param key
 *           A key string.
 * @return The enum value associated with the key
 * @throws JSONException
 *             if the key is not found or if the value cannot be converted
 *             to an enum.
 */
public <E extends Enum<E>> E getEnum(Class<E> clazz, String key) throws JSONException {
  E val = optEnum(clazz, key);
  if(val==null) {
    // JSONException should really take a throwable argument.
    // If it did, I would re-implement this with the Enum.valueOf
    // method and place any thrown exception in the JSONException
    throw new JSONException("JSONObject[" + quote(key)
        + "] is not an enum of type " + quote(clazz.getSimpleName())
        + ".");
  }
  return val;
}

代码示例来源：origin: org.codeartisans/org.json

/**
 * Get the enum value associated with a key.
 * 
 * @param clazz
 *            The type of enum to retrieve.
 * @param key
 *            A key string.
 * @return The enum value associated with the key or null if not found
 */
public <E extends Enum<E>> E optEnum(Class<E> clazz, String key) {
  return this.optEnum(clazz, key, null);
}

代码示例来源：origin: org.b3log/latke

/**
 * Get the enum value associated with a key.
 * 
 * @param <E>
 *            Enum Type
 * @param clazz
 *            The type of enum to retrieve.
 * @param key
 *            A key string.
 * @return The enum value associated with the key or null if not found
 */
public <E extends Enum<E>> E optEnum(Class<E> clazz, String key) {
  return this.optEnum(clazz, key, null);
}

代码示例来源：origin: org.codeartisans/org.json

/**
* Get the enum value associated with a key.
* 
* @param clazz
*           The type of enum to retrieve.
* @param key
*           A key string.
* @return The enum value associated with the key
* @throws JSONException
*             if the key is not found or if the value cannot be converted
*             to an enum.
*/
public <E extends Enum<E>> E getEnum(Class<E> clazz, String key) throws JSONException {
  E val = optEnum(clazz, key);
  if(val==null) {
    // JSONException should really take a throwable argument.
    // If it did, I would re-implement this with the Enum.valueOf
    // method and place any thrown exception in the JSONException
    throw new JSONException("JSONObject[" + quote(key)
        + "] is not an enum of type " + quote(clazz.getSimpleName())
        + ".");
  }
  return val;
}

代码示例来源：origin: org.b3log/latke

/**
 * Get the enum value associated with a key.
 * 
 * @param <E>
 *            Enum Type
 * @param clazz
 *           The type of enum to retrieve.
 * @param key
 *           A key string.
 * @return The enum value associated with the key
 * @throws JSONException
 *             if the key is not found or if the value cannot be converted
 *             to an enum.
 */
public <E extends Enum<E>> E getEnum(Class<E> clazz, String key) throws JSONException {
  E val = optEnum(clazz, key);
  if(val==null) {
    // JSONException should really take a throwable argument.
    // If it did, I would re-implement this with the Enum.valueOf
    // method and place any thrown exception in the JSONException
    throw new JSONException("JSONObject[" + quote(key)
        + "] is not an enum of type " + quote(clazz.getSimpleName())
        + ".");
  }
  return val;
}