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Added in API level 1

Summary: Ctors | Methods | Inherited Methods | [Expand All]

JSONTokener

public class JSONTokener
extends Object

java.lang.Object
↳	org.json.JSONTokener

Parses a JSON (RFC 4627) encoded string into the corresponding object. Most clients of this class will use only need the constructor and nextValue() method. Example usage:

 String json = "{"
         + "  \"query\": \"Pizza\", "
         + "  \"locations\": [ 94043, 90210 ] "
         + "}";

 JSONObject object = (JSONObject) new JSONTokener(json).nextValue();
 String query = object.getString("query");
 JSONArray locations = object.getJSONArray("locations");

For best interoperability and performance use JSON that complies with RFC 4627, such as that generated by JSONStringer. For legacy reasons this parser is lenient, so a successful parse does not indicate that the input string was valid JSON. All of the following syntax errors will be ignored:

End of line comments starting with // or # and ending with a newline character.
C-style comments starting with /* and ending with */. Such comments may not be nested.
Strings that are unquoted or 'single quoted'.
Hexadecimal integers prefixed with 0x or 0X.
Octal integers prefixed with 0.
Array elements separated by ;.
Unnecessary array separators. These are interpreted as if null was the omitted value.
Key-value pairs separated by = or =>.
Key-value pairs separated by ;.

Each tokener may be used to parse a single JSON string. Instances of this class are not thread safe. Although this class is nonfinal, it was not designed for inheritance and should not be subclassed. In particular, self-use by overrideable methods is not specified. See Effective Java Item 17, "Design and Document or inheritance or else prohibit it" for further information.

Summary

Public constructors
`JSONTokener(String in)`

Public methods
`void`	`back()` Unreads the most recent character of input.
`static int`	`dehexchar(char hex)` Returns the integer [0..15] value for the given hex character, or -1 for non-hex input.
`boolean`	`more()` Returns true until the input has been exhausted.
`char`	`next()` Returns the next available character, or the null character '\0' if all input has been exhausted.
`char`	`next(char c)` Returns the next available character if it equals `c`.
`String`	`next(int length)` Returns the next `length` characters of the input.
`char`	`nextClean()` Returns the next character that is not whitespace and does not belong to a comment.
`String`	`nextString(char quote)` Returns the string up to but not including `quote`, unescaping any character escape sequences encountered along the way.
`String`	`nextTo(String excluded)` Returns the `trimmed` string holding the characters up to but not including the first of: any character in `excluded` a newline character '\n' a carriage return '\r' The returned string shares its backing character array with this tokener's input string.
`String`	`nextTo(char excluded)` Equivalent to `nextTo(String.valueOf(excluded))`.
`Object`	`nextValue()` Returns the next value from the input.
`void`	`skipPast(String thru)` Advances past all input up to and including the next occurrence of `thru`.
`char`	`skipTo(char to)` Advances past all input up to but not including the next occurrence of `to`.
`JSONException`	`syntaxError(String message)` Returns an exception containing the given message plus the current position and the entire input string.
`String`	`toString()` Returns the current position and the entire input string.

Inherited methods

From class


  
    java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Public constructors

JSONTokener

Added in API level 1

JSONTokener (String in)

Parameters
`in`	`String`: JSON encoded string. Null is not permitted and will yield a tokener that throws `NullPointerExceptions` when methods are called.

Public methods

back

Added in API level 1

void back ()

Unreads the most recent character of input. If no input characters have been read, the input is unchanged.

dehexchar

Added in API level 1

int dehexchar (char hex)

Returns the integer [0..15] value for the given hex character, or -1 for non-hex input.

Parameters
`hex`	`char`: a character in the ranges [0-9], [A-F] or [a-f]. Any other character will yield a -1 result.

Returns
`int`

Added in API level 1

boolean more ()

Returns true until the input has been exhausted.

Returns
`boolean`

Added in API level 1

char next ()

Returns the next available character, or the null character '\0' if all input has been exhausted. The return value of this method is ambiguous for JSON strings that contain the character '\0'.

Returns
`char`

Added in API level 1

char next (char c)

Returns the next available character if it equals c. Otherwise an exception is thrown.

Parameters
`c`	`char`

Returns
`char`

Throws
`JSONException`

Added in API level 1

String next (int length)

Returns the next length characters of the input.

The returned string shares its backing character array with this tokener's input string. If a reference to the returned string may be held indefinitely, you should use new String(result) to copy it first to avoid memory leaks.

Parameters
`length`	`int`

Returns
`String`

Throws
`JSONException`	if the remaining input is not long enough to satisfy this request.

nextClean

Added in API level 1

char nextClean ()

Returns the next character that is not whitespace and does not belong to a comment. If the input is exhausted before such a character can be found, the null character '\0' is returned. The return value of this method is ambiguous for JSON strings that contain the character '\0'.

Returns
`char`

Throws
`JSONException`

nextString

Added in API level 1

String nextString (char quote)

Returns the string up to but not including quote, unescaping any character escape sequences encountered along the way. The opening quote should have already been read. This consumes the closing quote, but does not include it in the returned string.

Parameters
`quote`	`char`: either ' or ".

Returns
`String`

Throws
`JSONException`

nextTo

Added in API level 1

String nextTo (String excluded)

Returns the trimmed string holding the characters up to but not including the first of:

any character in excluded
a newline character '\n'
a carriage return '\r'

Parameters
`excluded`	`String`

Returns
`String`	a possibly-empty string

nextTo

Added in API level 1

String nextTo (char excluded)

Equivalent to nextTo(String.valueOf(excluded)).

Parameters
`excluded`	`char`

Returns
`String`

nextValue

Added in API level 1

Object nextValue ()

Returns the next value from the input.

Returns
`Object`	a `JSONObject`, `JSONArray`, String, Boolean, Integer, Long, Double or `NULL`.

Throws
`JSONException`	if the input is malformed.

skipPast

Added in API level 1

void skipPast (String thru)

Advances past all input up to and including the next occurrence of thru. If the remaining input doesn't contain thru, the input is exhausted.

Parameters
`thru`	`String`

Parameters
`to`	`char`

syntaxError

Added in API level 1

JSONException syntaxError (String message)

Returns an exception containing the given message plus the current position and the entire input string.

Parameters
`message`	`String`

Returns
`JSONException`

toString

Added in API level 1

String toString ()

Returns the current position and the entire input string.

Returns
`String`	a string representation of the object.

Most visited

Recently visited

Results for

JSONTokener

Summary

Public constructors

Public methods

Inherited methods

Public constructors

JSONTokener

Public methods

back

dehexchar

more

next

next

next

nextClean

nextString

nextTo

nextTo

nextValue

skipPast

skipTo

syntaxError

toString