Package com.google.gwt.json.client

## Class JSONObject

- java.lang.Object
- - com.google.gwt.json.client.JSONValue
  - - com.google.gwt.json.client.JSONObject

-     public class JSONObject
      extends JSONValue

  Represents a JSON object. A JSON object consists of a set of properties.

- - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `JSONObject()` |
    `JSONObject​(JavaScriptObject jsValue)` | Creates a new JSONObject from the supplied JavaScript value.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `boolean` | `containsKey​(java.lang.String key)` | Tests whether or not this JSONObject contains the specified property.
    `boolean` | `equals​(java.lang.Object other)` | Returns `true` if `other` is a `JSONObject` wrapping the same underlying object.
    `JSONValue` | `get​(java.lang.String key)` | Gets the JSONValue associated with the specified property.
    `JavaScriptObject` | `getJavaScriptObject()` | Returns the underlying JavaScript object that this object wraps.
    `(package private) JavaScriptObject` | `getUnwrapper()` | Internal.
    `int` | `hashCode()` |
    `JSONObject` | `isObject()` | Returns `this`, as this is a JSONObject.
    `java.util.Set<java.lang.String>` | `keySet()` | Returns the set of properties defined on this JSONObject.
    `JSONValue` | `put​(java.lang.String key, JSONValue jsonValue)` | Assign the specified property to the specified value in this JSONObject.
    `int` | `size()` | Determines the number of properties on this object.
    `java.lang.String` | `toString()` | Converts a JSONObject into a JSON representation that can be used to communicate with a JSON service.

    - ### Methods inherited from class com.google.gwt.json.client.JSONValue

      `isArray, isBoolean, isNull, isNumber, isString`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### JSONObject

          public JSONObject()

    - #### JSONObject

          public JSONObject​(JavaScriptObject jsValue)

      Creates a new JSONObject from the supplied JavaScript value.

  - ### Method Detail

    - #### containsKey

          public boolean containsKey​(java.lang.String key)

      Tests whether or not this JSONObject contains the specified property.
      Parameters:
        `key` - the property to search for
      Returns:
        `true` if the JSONObject contains the specified property

    - #### equals

          public boolean equals​(java.lang.Object other)

      Returns `true` if `other` is a `JSONObject` wrapping the same underlying object.
      Overrides:
        `equals` in class `java.lang.Object`

    - #### get

          public JSONValue get​(java.lang.String key)

      Gets the JSONValue associated with the specified property.
      Parameters:
        `key` - the property to access
      Returns:
        the value of the specified property, or `null` if the property does not exist
      Throws:
        `java.lang.NullPointerException` - if key is `null`

    - #### getJavaScriptObject

          public JavaScriptObject getJavaScriptObject()

      Returns the underlying JavaScript object that this object wraps.

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `java.lang.Object`

    - #### isObject

          public JSONObject isObject()

      Returns `this`, as this is a JSONObject.
      Overrides:
        `isObject` in class `JSONValue`
      Returns:
        a reference to a JSONObject if this JSONValue is a JSONObject or `null` otherwise.

    - #### keySet

          public java.util.Set<java.lang.String> keySet()

      Returns the set of properties defined on this JSONObject. The returned set is immutable.

    - #### put

          public JSONValue put​(java.lang.String key,
                               JSONValue jsonValue)

      Assign the specified property to the specified value in this JSONObject. If the property already has an associated value, it is overwritten.
      Parameters:
        `key` - the property to assign
        `jsonValue` - the value to assign
      Returns:
        the previous value of the property, or `null` if the property did not exist
      Throws:
        `java.lang.NullPointerException` - if key is `null`

    - #### size

          public int size()

      Determines the number of properties on this object.

    - #### toString

          public java.lang.String toString()

      Converts a JSONObject into a JSON representation that can be used to communicate with a JSON service.
      Specified by:
        `toString` in class `JSONValue`
      Returns:
        a JSON string representation of this JSONObject instance

    - #### getUnwrapper

          JavaScriptObject getUnwrapper()

      Description copied from class: `JSONValue`
      Internal. Returns a JS func that can unwrap this value. Used from native code.
      Specified by:
        `getUnwrapper` in class `JSONValue`