程序包 com.sh.json

类 JSONNull

java.lang.Object

com.sh.json.JSONNull

所有已实现的接口:

JSON, Serializable

public final class JSONNull
extends Object
implements JSON

JSONNull is equivalent to the value that JavaScript calls null, whilst Java's null is equivalent to the value that JavaScript calls undefined.

另请参阅:

• 序列化表格

方法概要

修饰符和类型	方法	说明
boolean	equals(Object object)	A Null object is equal to the null value and to itself.
static JSONNull	getInstance()	Returns the singleton instance of JSONNull
int	hashCode()
boolean	isArray()	Returns true if this object is a JSONArray, false otherwise.
boolean	isEmpty()	Returns true if this object has no elements or keys.
int	size()	Returns the number of properties in an object or the size of the array.
String	toString()	Get the "null" string value.
String	toString(int indentFactor)	Make a prettyprinted JSON text.
String	toString(int indentFactor, int indent)	Make a prettyprinted JSON text.
Writer	write(Writer writer)	Write the contents as JSON text to a writer.

从类继承的方法 java.lang.Object

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

方法详细资料

getInstance

public static JSONNull getInstance()

Returns the singleton instance of JSONNull

equals

public boolean equals(Object object)

A Null object is equal to the null value and to itself.

覆盖:

equals 在类中 Object

参数:

object - An object to test for nullness.

返回:

true if the object parameter is the JSONObject.NULL object or null.

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

isArray

public boolean isArray()

从接口复制的说明: JSON

Returns true if this object is a JSONArray, false otherwise.

指定者:

isArray 在接口中 JSON

isEmpty

public boolean isEmpty()

从接口复制的说明: JSON

Returns true if this object has no elements or keys.

指定者:

isEmpty 在接口中 JSON

size

public int size()

从接口复制的说明: JSON

Returns the number of properties in an object or the size of the array.

指定者:

size 在接口中 JSON

返回:

the size of an json object or array

toString

public String toString()

Get the "null" string value.

覆盖:

toString 在类中 Object

返回:

The string "null".

toString

public String toString(int indentFactor)

从接口复制的说明: JSON

Make a prettyprinted JSON text.

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

指定者:

toString 在接口中 JSON

参数:

indentFactor - The number of spaces to add to each level of indentation.

返回:

a printable, displayable, portable, transmittable representation of the object, beginning with { (left brace) and ending with } (right brace).

toString

public String toString(int indentFactor,
 int indent)

从接口复制的说明: JSON

Make a prettyprinted JSON text.

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

指定者:

toString 在接口中 JSON

参数:

indentFactor - The number of spaces to add to each level of indentation.

indent - The indentation of the top level.

返回:

a printable, displayable, transmittable representation of the object, beginning with { (left brace) and ending with } (right brace).

write

public Writer write(Writer writer)

从接口复制的说明: JSON

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

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

指定者:

write 在接口中 JSON

返回:

The writer.