com.amazonaws.util.json

## クラス JSONObject

- java.lang.Object
- - com.amazonaws.util.json.JSONObject

-     public class JSONObject
      extends java.lang.Object

  A JSONObject is an unordered collection of name/value pairs. Its external form is a string wrapped in curly braces with colons between the names and values, and commas between the values and names. The internal form is an object having `get` and `opt` methods for accessing the values by name, and `put` methods for adding or replacing values by name. The values can be any of these types: `Boolean`, `JSONArray`, `JSONObject`, `Number`, `String`, or the `JSONObject.NULL` object. A JSONObject constructor can be used to convert an external form JSON text into an internal form whose values can be retrieved with the `get` and `opt` methods, or to convert values into a JSON text using the `put` and `toString` methods. A `get` method returns a value if one can be found, and throws an exception if one cannot be found. An `opt` method returns a default value instead of throwing an exception, and so is useful for obtaining optional values.

  The generic `get()` and `opt()` methods return an object, which you can cast or query for type. There are also typed `get` and `opt` methods that do type checking and type coercion for you.

  The `put` methods adds values to an object. For example,

           myString = new JSONObject().put("JSON", "Hello, World!").toString();

  produces the string `{"JSON": "Hello, World"}`.

  The texts produced by the `toString` methods strictly conform to the JSON syntax rules. The constructors are more forgiving in the texts they will accept:

  - An extra `,` (comma) may appear just before the closing brace.
  - Strings may be quoted with `'` (single quote).
  - Strings do not need to be quoted at all if they do not begin with a quote or single quote, and if they do not contain leading or trailing spaces, and if they do not contain any of these characters: `{ } [ ] / \ : , = ; #` and if they do not look like numbers and if they are not the reserved words `true`, `false`, or `null`.
  - Keys can be followed by `=` or `=>` as well as by `:`.
  - Values can be followed by `;` (semicolon) as well as by `,` (comma).
  - Numbers may have the `0x-` (hex) prefix.
  バージョン:
    2010-05-17

- - ### フィールドの概要

    フィールド
    修飾子とタイプ | フィールドと説明
    --- | ---
    `static java.lang.Object` | `NULL` It is sometimes more convenient and less ambiguous to have a `NULL` object than to use Java's `null` value.

  - ### コンストラクタの概要

    コンストラクタ
    コンストラクタと説明
    `JSONObject()` Construct an empty JSONObject.
    `JSONObject(JSONObject jo, java.lang.String[] names)` Construct a JSONObject from a subset of another JSONObject.
    `JSONObject(JSONTokener x)` Construct a JSONObject from a JSONTokener.
    `JSONObject(java.util.Map map)` Construct a JSONObject from a Map.
    `JSONObject(java.lang.Object bean)` Construct a JSONObject from an Object using bean getters.
    `JSONObject(java.lang.Object object, java.lang.String[] names)` Construct a JSONObject from an Object, using reflection to find the public members.
    `JSONObject(java.lang.String source)` Construct a JSONObject from a source JSON text string.

  - ### メソッドの概要

    メソッド
    修飾子とタイプ | メソッドと説明
    --- | ---
    `JSONObject` | `accumulate(java.lang.String key, java.lang.Object value)` Accumulate values under a key.
    `JSONObject` | `append(java.lang.String key, java.lang.Object value)` Append values to the array under a key.
    `static java.lang.String` | `doubleToString(double d)` Produce a string from a double.
    `java.lang.Object` | `get(java.lang.String key)` Get the value object associated with a key.
    `boolean` | `getBoolean(java.lang.String key)` Get the boolean value associated with a key.
    `double` | `getDouble(java.lang.String key)` Get the double value associated with a key.
    `int` | `getInt(java.lang.String key)` Get the int value associated with a key.
    `JSONArray` | `getJSONArray(java.lang.String key)` Get the JSONArray value associated with a key.
    `JSONObject` | `getJSONObject(java.lang.String key)` Get the JSONObject value associated with a key.
    `long` | `getLong(java.lang.String key)` Get the long value associated with a key.
    `static java.lang.String[]` | `getNames(JSONObject jo)` Get an array of field names from a JSONObject.
    `static java.lang.String[]` | `getNames(java.lang.Object object)` Get an array of field names from an Object.
    `java.lang.String` | `getString(java.lang.String key)` Get the string associated with a key.
    `boolean` | `has(java.lang.String key)` Determine if the JSONObject contains a specific key.
    `JSONObject` | `increment(java.lang.String key)` Increment a property of a JSONObject.
    `boolean` | `isNull(java.lang.String key)` Determine if the value associated with the key is null or if there is no value.
    `java.util.Iterator` | `keys()` Get an enumeration of the keys of the JSONObject.
    `int` | `length()` Get the number of keys stored in the JSONObject.
    `JSONArray` | `names()` Produce a JSONArray containing the names of the elements of this JSONObject.
    `static java.lang.String` | `numberToString(java.lang.Number n)` Produce a string from a Number.
    `java.lang.Object` | `opt(java.lang.String key)` Get an optional value associated with a key.
    `boolean` | `optBoolean(java.lang.String key)` Get an optional boolean associated with a key.
    `boolean` | `optBoolean(java.lang.String key, boolean defaultValue)` Get an optional boolean associated with a key.
    `double` | `optDouble(java.lang.String key)` Get an optional double associated with a key, or NaN if there is no such key or if its value is not a number.
    `double` | `optDouble(java.lang.String key, double defaultValue)` Get an optional double associated with a key, or the defaultValue if there is no such key or if its value is not a number.
    `int` | `optInt(java.lang.String key)` Get an optional int value associated with a key, or zero if there is no such key or if the value is not a number.
    `int` | `optInt(java.lang.String key, int defaultValue)` Get an optional int value associated with a key, or the default if there is no such key or if the value is not a number.
    `JSONArray` | `optJSONArray(java.lang.String key)` Get an optional JSONArray associated with a key.
    `JSONObject` | `optJSONObject(java.lang.String key)` Get an optional JSONObject associated with a key.
    `long` | `optLong(java.lang.String key)` Get an optional long value associated with a key, or zero if there is no such key or if the value is not a number.
    `long` | `optLong(java.lang.String key, long defaultValue)` Get an optional long value associated with a key, or the default if there is no such key or if the value is not a number.
    `java.lang.String` | `optString(java.lang.String key)` Get an optional string associated with a key.
    `java.lang.String` | `optString(java.lang.String key, java.lang.String defaultValue)` Get an optional string associated with a key.
    `JSONObject` | `put(java.lang.String key, boolean value)` Put a key/boolean pair in the JSONObject.
    `JSONObject` | `put(java.lang.String key, java.util.Collection value)` Put a key/value pair in the JSONObject, where the value will be a JSONArray which is produced from a Collection.
    `JSONObject` | `put(java.lang.String key, double value)` Put a key/double pair in the JSONObject.
    `JSONObject` | `put(java.lang.String key, int value)` Put a key/int pair in the JSONObject.
    `JSONObject` | `put(java.lang.String key, long value)` Put a key/long pair in the JSONObject.
    `JSONObject` | `put(java.lang.String key, java.util.Map value)` Put a key/value pair in the JSONObject, where the value will be a JSONObject which is produced from a Map.
    `JSONObject` | `put(java.lang.String key, java.lang.Object value)` Put a key/value pair in the JSONObject.
    `JSONObject` | `putOnce(java.lang.String key, java.lang.Object value)` Put a key/value pair in the JSONObject, but only if the key and the value are both non-null, and only if there is not already a member with that name.
    `JSONObject` | `putOpt(java.lang.String key, java.lang.Object value)` Put a key/value pair in the JSONObject, but only if the key and the value are both non-null.
    `static java.lang.String` | `quote(java.lang.String string)` Produce a string in double quotes with backslash sequences in all the right places.
    `java.lang.Object` | `remove(java.lang.String key)` Remove a name and its value, if present.
    `java.util.Iterator` | `sortedKeys()` Get an enumeration of the keys of the JSONObject.
    `static java.lang.Object` | `stringToValue(java.lang.String s)` Try to convert a string into a number, boolean, or null.
    `JSONArray` | `toJSONArray(JSONArray names)` Produce a JSONArray containing the values of the members of this JSONObject.
    `java.lang.String` | `toString()` Make a JSON text of this JSONObject.
    `java.lang.String` | `toString(int indentFactor)` Make a prettyprinted JSON text of this JSONObject.
    `java.io.Writer` | `write(java.io.Writer writer)` Write the contents of the JSONObject as JSON text to a writer.

    - ### クラスから継承されたメソッド java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### フィールドの詳細

    - #### NULL

          public static final java.lang.Object NULL

      It is sometimes more convenient and less ambiguous to have a `NULL` object than to use Java's `null` value. `JSONObject.NULL.equals(null)` returns `true`. `JSONObject.NULL.toString()` returns `"null"`.

  - ### コンストラクタの詳細

    - #### JSONObject

          public JSONObject()

      Construct an empty JSONObject.

    - #### JSONObject

          public JSONObject(JSONObject jo,
                    java.lang.String[] names)

      Construct a JSONObject from a subset of another JSONObject. An array of strings is used to identify the keys that should be copied. Missing keys are ignored.
      パラメータ:
        `jo` - A JSONObject.
        `names` - An array of strings.
      例外:
        `JSONException`
        `JSONException` - If a value is a non-finite number or if a name is duplicated.

    - #### JSONObject

          public JSONObject(JSONTokener x)
                     throws JSONException

      Construct a JSONObject from a JSONTokener.
      パラメータ:
        `x` - A JSONTokener object containing the source string.
      例外:
        `JSONException` - If there is a syntax error in the source string or a duplicated key.

    - #### JSONObject

          public JSONObject(java.util.Map map)

      Construct a JSONObject from a Map.
      パラメータ:
        `map` - A map object that can be used to initialize the contents of the JSONObject.
      例外:
        `JSONException`

    - #### JSONObject

          public JSONObject(java.lang.Object bean)

      Construct a JSONObject from an Object using bean getters. It reflects on all of the public methods of the object. For each of the methods with no parameters and a name starting with `"get"` or `"is"` followed by an uppercase letter, the method is invoked, and a key and the value returned from the getter method are put into the new JSONObject. The key is formed by removing the `"get"` or `"is"` prefix. If the second remaining character is not upper case, then the first character is converted to lower case. For example, if an object has a method named `"getName"`, and if the result of calling `object.getName()` is `"Larry Fine"`, then the JSONObject will contain `"name": "Larry Fine"`.
      パラメータ:
        `bean` - An object that has getter methods that should be used to make a JSONObject.

    - #### JSONObject

          public JSONObject(java.lang.Object object,
                    java.lang.String[] names)

      Construct a JSONObject from an Object, using reflection to find the public members. The resulting JSONObject's keys will be the strings from the names array, and the values will be the field values associated with those keys in the object. If a key is not found or not visible, then it will not be copied into the new JSONObject.
      パラメータ:
        `object` - An object that has fields that should be used to make a JSONObject.
        `names` - An array of strings, the names of the fields to be obtained from the object.

    - #### JSONObject

          public JSONObject(java.lang.String source)
                     throws JSONException

      Construct a JSONObject from a source JSON text string. This is the most commonly used JSONObject constructor.
      パラメータ:
        `source` - A string beginning with `{` (left brace) and ending with `}` (right brace).
      例外:
        `JSONException` - If there is a syntax error in the source string or a duplicated key.

  - ### メソッドの詳細

    - #### accumulate

          public JSONObject accumulate(java.lang.String key,
                              java.lang.Object value)
                                throws JSONException

      Accumulate values under a key. It is similar to the put method except that if there is already an object stored under the key then a JSONArray is stored under the key to hold all of the accumulated values. If there is already a JSONArray, then the new value is appended to it. In contrast, the put method replaces the previous value.
      パラメータ:
        `key` - A key string.
        `value` - An object to be accumulated under the key.
      戻り値:
        this.
      例外:
        `JSONException` - If the value is an invalid number or if the key is null.

    - #### append

          public JSONObject append(java.lang.String key,
                          java.lang.Object value)
                            throws JSONException

      Append values to the array under a key. If the key does not exist in the JSONObject, then the key is put in the JSONObject with its value being a JSONArray containing the value parameter. If the key was already associated with a JSONArray, then the value parameter is appended to it.
      パラメータ:
        `key` - A key string.
        `value` - An object to be accumulated under the key.
      戻り値:
        this.
      例外:
        `JSONException` - If the key is null or if the current value associated with the key is not a JSONArray.

    - #### doubleToString

          public static java.lang.String doubleToString(double d)

      Produce a string from a double. The string "null" will be returned if the number is not finite.
      パラメータ:
        `d` - A double.
      戻り値:
        A String.

    - #### get

          public java.lang.Object get(java.lang.String key)
                               throws JSONException

      Get the value object associated with a key.
      パラメータ:
        `key` - A key string.
      戻り値:
        The object associated with the key.
      例外:
        `JSONException` - if the key is not found.

    - #### getBoolean

          public boolean getBoolean(java.lang.String key)
                             throws JSONException

      Get the boolean value associated with a key.
      パラメータ:
        `key` - A key string.
      戻り値:
        The truth.
      例外:
        `JSONException` - if the value is not a Boolean or the String "true" or "false".

    - #### getDouble

          public double getDouble(java.lang.String key)
                           throws JSONException

      Get the double value associated with a key.
      パラメータ:
        `key` - A key string.
      戻り値:
        The numeric value.
      例外:
        `JSONException` - if the key is not found or if the value is not a Number object and cannot be converted to a number.

    - #### getInt

          public int getInt(java.lang.String key)
                     throws JSONException

      Get the int value associated with a key.
      パラメータ:
        `key` - A key string.
      戻り値:
        The integer value.
      例外:
        `JSONException` - if the key is not found or if the value cannot be converted to an integer.

    - #### getJSONArray

          public JSONArray getJSONArray(java.lang.String key)
                                 throws JSONException

      Get the JSONArray value associated with a key.
      パラメータ:
        `key` - A key string.
      戻り値:
        A JSONArray which is the value.
      例外:
        `JSONException` - if the key is not found or if the value is not a JSONArray.

    - #### getJSONObject

          public JSONObject getJSONObject(java.lang.String key)
                                   throws JSONException

      Get the JSONObject value associated with a key.
      パラメータ:
        `key` - A key string.
      戻り値:
        A JSONObject which is the value.
      例外:
        `JSONException` - if the key is not found or if the value is not a JSONObject.

    - #### getLong

          public long getLong(java.lang.String key)
                       throws JSONException

      Get the long value associated with a key.
      パラメータ:
        `key` - A key string.
      戻り値:
        The long value.
      例外:
        `JSONException` - if the key is not found or if the value cannot be converted to a long.

    - #### getNames

          public static java.lang.String[] getNames(JSONObject jo)

      Get an array of field names from a JSONObject.
      戻り値:
        An array of field names, or null if there are no names.

    - #### getNames

          public static java.lang.String[] getNames(java.lang.Object object)

      Get an array of field names from an Object.
      戻り値:
        An array of field names, or null if there are no names.

    - #### getString

          public java.lang.String getString(java.lang.String key)
                                     throws JSONException

      Get the string associated with a key.
      パラメータ:
        `key` - A key string.
      戻り値:
        A string which is the value.
      例外:
        `JSONException` - if the key is not found.

    - #### has

          public boolean has(java.lang.String key)

      Determine if the JSONObject contains a specific key.
      パラメータ:
        `key` - A key string.
      戻り値:
        true if the key exists in the JSONObject.

    - #### increment

          public JSONObject increment(java.lang.String key)
                               throws JSONException

      Increment a property of a JSONObject. If there is no such property, create one with a value of 1. If there is such a property, and if it is an Integer, Long, Double, or Float, then add one to it.
      パラメータ:
        `key` - A key string.
      戻り値:
        this.
      例外:
        `JSONException` - If there is already a property with this name that is not an Integer, Long, Double, or Float.

    - #### isNull

          public boolean isNull(java.lang.String key)

      Determine if the value associated with the key is null or if there is no value.
      パラメータ:
        `key` - A key string.
      戻り値:
        true if there is no value associated with the key or if the value is the JSONObject.NULL object.

    - #### keys

          public java.util.Iterator keys()

      Get an enumeration of the keys of the JSONObject.
      戻り値:
        An iterator of the keys.

    - #### length

          public int length()

      Get the number of keys stored in the JSONObject.
      戻り値:
        The number of keys in the JSONObject.

    - #### names

          public JSONArray names()

      Produce a JSONArray containing the names of the elements of this JSONObject.
      戻り値:
        A JSONArray containing the key strings, or null if the JSONObject is empty.

    - #### numberToString

          public static java.lang.String numberToString(java.lang.Number n)
                                                 throws JSONException

      Produce a string from a Number.
      パラメータ:
        `n` - A Number
      戻り値:
        A String.
      例外:
        `JSONException` - If n is a non-finite number.

    - #### opt

          public java.lang.Object opt(java.lang.String key)

      Get an optional value associated with a key.
      パラメータ:
        `key` - A key string.
      戻り値:
        An object which is the value, or null if there is no value.

    - #### optBoolean

          public boolean optBoolean(java.lang.String key)

      Get an optional boolean associated with a key. It returns false if there is no such key, or if the value is not Boolean.TRUE or the String "true".
      パラメータ:
        `key` - A key string.
      戻り値:
        The truth.

    - #### optBoolean

          public boolean optBoolean(java.lang.String key,
                           boolean defaultValue)

      Get an optional boolean associated with a key. It returns the defaultValue if there is no such key, or if it is not a Boolean or the String "true" or "false" (case insensitive).
      パラメータ:
        `key` - A key string.
        `defaultValue` - The default.
      戻り値:
        The truth.

    - #### optDouble

          public double optDouble(java.lang.String key)

      Get an optional double associated with a key, or NaN if there is no such key or if its value is not a number. If the value is a string, an attempt will be made to evaluate it as a number.
      パラメータ:
        `key` - A string which is the key.
      戻り値:
        An object which is the value.

    - #### optDouble

          public double optDouble(java.lang.String key,
                         double defaultValue)

      Get an optional double associated with a key, or the defaultValue if there is no such key or if its value is not a number. If the value is a string, an attempt will be made to evaluate it as a number.
      パラメータ:
        `key` - A key string.
        `defaultValue` - The default.
      戻り値:
        An object which is the value.

    - #### optInt

          public int optInt(java.lang.String key)

      Get an optional int value associated with a key, or zero if there is no such key or if the value is not a number. If the value is a string, an attempt will be made to evaluate it as a number.
      パラメータ:
        `key` - A key string.
      戻り値:
        An object which is the value.

    - #### optInt

          public int optInt(java.lang.String key,
                   int defaultValue)

      Get an optional int value associated with a key, or the default if there is no such key or if the value is not a number. If the value is a string, an attempt will be made to evaluate it as a number.
      パラメータ:
        `key` - A key string.
        `defaultValue` - The default.
      戻り値:
        An object which is the value.

    - #### optJSONArray

          public JSONArray optJSONArray(java.lang.String key)

      Get an optional JSONArray associated with a key. It returns null if there is no such key, or if its value is not a JSONArray.
      パラメータ:
        `key` - A key string.
      戻り値:
        A JSONArray which is the value.

    - #### optJSONObject

          public JSONObject optJSONObject(java.lang.String key)

      Get an optional JSONObject associated with a key. It returns null if there is no such key, or if its value is not a JSONObject.
      パラメータ:
        `key` - A key string.
      戻り値:
        A JSONObject which is the value.

    - #### optLong

          public long optLong(java.lang.String key)

      Get an optional long value associated with a key, or zero if there is no such key or if the value is not a number. If the value is a string, an attempt will be made to evaluate it as a number.
      パラメータ:
        `key` - A key string.
      戻り値:
        An object which is the value.

    - #### optLong

          public long optLong(java.lang.String key,
                     long defaultValue)

      Get an optional long value associated with a key, or the default if there is no such key or if the value is not a number. If the value is a string, an attempt will be made to evaluate it as a number.
      パラメータ:
        `key` - A key string.
        `defaultValue` - The default.
      戻り値:
        An object which is the value.

    - #### optString

          public java.lang.String optString(java.lang.String key)

      Get an optional string associated with a key. It returns an empty string if there is no such key. If the value is not a string and is not null, then it is coverted to a string.
      パラメータ:
        `key` - A key string.
      戻り値:
        A string which is the value.

    - #### optString

          public java.lang.String optString(java.lang.String key,
                                   java.lang.String defaultValue)

      Get an optional string associated with a key. It returns the defaultValue if there is no such key.
      パラメータ:
        `key` - A key string.
        `defaultValue` - The default.
      戻り値:
        A string which is the value.

    - #### put

          public JSONObject put(java.lang.String key,
                       boolean value)
                         throws JSONException

      Put a key/boolean pair in the JSONObject.
      パラメータ:
        `key` - A key string.
        `value` - A boolean which is the value.
      戻り値:
        this.
      例外:
        `JSONException` - If the key is null.

    - #### put

          public JSONObject put(java.lang.String key,
                       java.util.Collection value)
                         throws JSONException

      Put a key/value pair in the JSONObject, where the value will be a JSONArray which is produced from a Collection.
      パラメータ:
        `key` - A key string.
        `value` - A Collection value.
      戻り値:
        this.
      例外:
        `JSONException`

    - #### put

          public JSONObject put(java.lang.String key,
                       double value)
                         throws JSONException

      Put a key/double pair in the JSONObject.
      パラメータ:
        `key` - A key string.
        `value` - A double which is the value.
      戻り値:
        this.
      例外:
        `JSONException` - If the key is null or if the number is invalid.

    - #### put

          public JSONObject put(java.lang.String key,
                       int value)
                         throws JSONException

      Put a key/int pair in the JSONObject.
      パラメータ:
        `key` - A key string.
        `value` - An int which is the value.
      戻り値:
        this.
      例外:
        `JSONException` - If the key is null.

    - #### put

          public JSONObject put(java.lang.String key,
                       long value)
                         throws JSONException

      Put a key/long pair in the JSONObject.
      パラメータ:
        `key` - A key string.
        `value` - A long which is the value.
      戻り値:
        this.
      例外:
        `JSONException` - If the key is null.

    - #### put

          public JSONObject put(java.lang.String key,
                       java.util.Map value)
                         throws JSONException

      Put a key/value pair in the JSONObject, where the value will be a JSONObject which is produced from a Map.
      パラメータ:
        `key` - A key string.
        `value` - A Map value.
      戻り値:
        this.
      例外:
        `JSONException`

    - #### put

          public JSONObject put(java.lang.String key,
                       java.lang.Object value)
                         throws JSONException

      Put a key/value pair in the JSONObject. If the value is null, then the key will be removed from the JSONObject if it is present.
      パラメータ:
        `key` - A key string.
        `value` - An object which is the value. It should be of one of these types: Boolean, Double, Integer, JSONArray, JSONObject, Long, String, or the JSONObject.NULL object.
      戻り値:
        this.
      例外:
        `JSONException` - If the value is non-finite number or if the key is null.

    - #### putOnce

          public JSONObject putOnce(java.lang.String key,
                           java.lang.Object value)
                             throws JSONException

      Put a key/value pair in the JSONObject, but only if the key and the value are both non-null, and only if there is not already a member with that name.
      パラメータ:
        `key` -
        `value` -
      戻り値:
        his.
      例外:
        `JSONException` - if the key is a duplicate

    - #### putOpt

          public JSONObject putOpt(java.lang.String key,
                          java.lang.Object value)
                            throws JSONException

      Put a key/value pair in the JSONObject, but only if the key and the value are both non-null.
      パラメータ:
        `key` - A key string.
        `value` - An object which is the value. It should be of one of these types: Boolean, Double, Integer, JSONArray, JSONObject, Long, String, or the JSONObject.NULL object.
      戻り値:
        this.
      例外:
        `JSONException` - If the value is a non-finite number.

    - #### quote

          public static java.lang.String quote(java.lang.String string)

      Produce a string in double quotes with backslash sequences in all the right places. A backslash will be inserted within
      パラメータ:
        `string` - A String
      戻り値:
        A String correctly formatted for insertion in a JSON text.

    - #### remove

          public java.lang.Object remove(java.lang.String key)

      Remove a name and its value, if present.
      パラメータ:
        `key` - The name to be removed.
      戻り値:
        The value that was associated with the name, or null if there was no value.

    - #### sortedKeys

          public java.util.Iterator sortedKeys()

      Get an enumeration of the keys of the JSONObject. The keys will be sorted alphabetically.
      戻り値:
        An iterator of the keys.

    - #### stringToValue

          public static java.lang.Object stringToValue(java.lang.String s)

      Try to convert a string into a number, boolean, or null. If the string can't be converted, return the string.
      パラメータ:
        `s` - A String.
      戻り値:
        A simple JSON value.

    - #### toJSONArray

          public JSONArray toJSONArray(JSONArray names)
                                throws JSONException

      Produce a JSONArray containing the values of the members of this JSONObject.
      パラメータ:
        `names` - A JSONArray containing a list of key strings. This determines the sequence of the values in the result.
      戻り値:
        A JSONArray of values.
      例外:
        `JSONException` - If any of the values are non-finite numbers.

    - #### toString

          public java.lang.String toString()

      Make a JSON text of this JSONObject. For compactness, no whitespace is added. If this would not result in a syntactically correct JSON text, then null will be returned instead.

      Warning: This method assumes that the data structure is acyclical.

      オーバーライド:
        `toString` クラス内 `java.lang.Object`
      戻り値:
        a printable, displayable, portable, transmittable representation of the object, beginning with `{` (left brace) and ending with `}` (right brace).

    - #### toString

          public java.lang.String toString(int indentFactor)
                                    throws JSONException

      Make a prettyprinted JSON text of this JSONObject.

      Warning: This method assumes that the data structure is acyclical.

      パラメータ:
        `indentFactor` - The number of spaces to add to each level of indentation.
      戻り値:
        a printable, displayable, portable, transmittable representation of the object, beginning with `{` (left brace) and ending with `}` (right brace).
      例外:
        `JSONException` - If the object contains an invalid number.

    - #### write

          public java.io.Writer write(java.io.Writer writer)
                               throws JSONException

      Write the contents of the JSONObject as JSON text to a writer. For compactness, no whitespace is added.

      Warning: This method assumes that the data structure is acyclical.

      戻り値:
        The writer.
      例外:
        `JSONException`