Light and fast JSON library, compliant to https://www.ietf.org/rfc/rfc4627.txt
This library provides comprehensive JSON support, including both encoding and decoding.
The JSONValue abstract class serves as the foundation for parsing JSON values.
Its parse() method takes a JSON string as input and returns the corresponding parsed object.
The JSONObject class specifically handles JSON objects, offering a toString() method to convert them back into human-readable JSON strings.
The class TestSuite performs automatic tests of JSON parser.
in case of JSON object, you can use Java oriented constructor JSONObject followed by toString() method invocation, e.g.:
new JSONObject("{\"a\":\"123\",\"b\":true}").toString()
in case of JSON array, you can use Java oriented constructor JSONArray followed by toString() method invocation, e.g.:
new JSONArray("[\"a\":\"123\",\"b\":true]").toString()
use parse() method followed by toJava() method invocation, e.g.:
JSONValue.parse("{\"a\":[[[1,2,3],[false,true],[null]],{\"a\":{}}]}").toJava()
Class TestSuite performs automatic tests of json parser.
compile: javac -encoding UTF-8 json\TestSuite.java
run: java json.TestSuite [json file]
- in case optional argument json file is provided, it parses the file and returns the string from the JSONValue
- if no optional argument is provided, it performs built in automatic tests of json parser.
JSON syntax is based on RFC4627
JSON-text ::= object | array
object ::= '{' [ member ( ',' member )* ] '}'
member ::= string ':' value
array ::= '[' [ value ( ',' value )* ] ']'
value ::= 'false' | 'null' | 'true' | object | array | number | string
number ::= [ '-' ] int [ frac ] [ exp ]
int ::= '0' | ( digit1-9 digit* )
frac ::= '.' digit+
digit ::= '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9'
exp ::= ('e' | 'E') [ '+' | '-' ] digit+
string ::= '"' char* '"'
char ::= unescaped | '\' ('"' | '\' | '/' | 'b' | 'f' | 'n' | 'r' | 't' | 'u' <hex><hex><hex><hex>)
unescaped ::= %x20-21 | %x23-5B | %x5D-10FFFF
note: symbol * indicates 0 or more instances while symbol + indicates 1 or more instances
JSONValue
JSONObject extends JSONValue
JSONArray extends JSONValue
JSONString extends JSONValue
JSONNumber extends JSONValue
JSONBoolean extends JSONValue
JSONException extends Exception
Scanner
TestSuite
Useful public methods in JSONValue and related classes:
Object toJava();//return Java value
String toString();//return JSON value
boolean equals(Object o)//check equality