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What should I import for JSON object in Java?

What is org JSON jar?

JSON is a light-weight, language independent, data interchange format. See http://www.JSON.org/ The files in this package implement JSON encoders/decoders in Java. It also includes the capability to convert between JSON and XML, HTTP headers, Cookies, and CDL.

What is the use of Org JSON?

json or JSON-Java is a simple Java based toolkit for JSON. You can use org. json to encode or decode JSON data.

What is the use of JSON object in Java?

JsonObject class represents an immutable JSON object value (an unordered collection of zero or more name/value pairs). It also provides unmodifiable map view to the JSON object name/value mappings. A JsonObject instance can be created from an input source using JsonReader.

What is JSON object in API?

JSON objects are very much like javascript objects. JSON objects are written in key/value pairs. JSON objects are surrounded by curly braces { } . Keys must be strings, and values must be a valid JSON data type (string, number, object, array, boolean or null). Keys and values are separated by a colon.

Where can I download org JSON?

org. json is now regularly updated in the Maven repository. The latest release is 12 Feb, 2016: http://mvnrepository.com/artifact/org.json/json.

Is org JSON open source?

Thus, the license is nonfree. Similarly it is not open source because it conflicts with term 6 of the Open Source Definition, “No Discrimination Against Fields of Endeavor”.

What is org JSON in Android?

org.json.JSONObject. A modifiable set of name/value mappings. Names are unique, non-null strings. Values may be any mix of JSONObjects , JSONArrays , Strings, Booleans, Integers, Longs, Doubles or NULL .

Is org JSON deprecated?

Apache Sling Commons JSON

Unfortunately, Apache’s legal team determined the basis for Apache Sling’s Commons JSON library, org. json has a unique license which is not compatible with the Apache 2.0 license used by Apache Sling. Thus, the library was deprecated and is now officially deprecated in AEM 6.3.

What is difference between JSON object and JSON object?

JSONObject is “native” to Android SDK, JsonObject is probably the one from Gson library, the one that I use. Two different package, don’t work with both 😉 choose one. I had some issue with the date formatting in JSONObject.

How do I import a JSON file into Eclipse?

How do you create and return a JSON object in Java?

What does JSON object contain?

A JSON object contains zero, one, or more key-value pairs, also called properties. The object is surrounded by curly braces {} . Every key-value pair is separated by a comma. The order of the key-value pair is irrelevant.

How do you pass a JSON object into a string in Java?

JSONObject json= (JSONObject) JSONValue. parse(jsonData); JSONObject data = (JSONObject) json. get(“data”); After you have parsed the json data, you need to access the data object later get “map” data to json string.

What dependency should I use for JSON object?

JSON is a light-weight, language independent, data interchange format. See http://www.JSON.org/ The files in this package implement JSON encoders/decoders in Java. It also includes the capability to convert between JSON and XML, HTTP headers, Cookies, and CDL.

How do I import a JSON file into Eclipse?

How do you create and return a JSON object in Java?

How do I create a JSON file?

Open a Text editor like Notepad, Visual Studio Code, Sublime, or your favorite one. Copy and Paste below JSON data in Text Editor or create your own base on the What is JSON article. Once file data are validated, save the file with the extension of . json, and now you know how to create the Valid JSON document.

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Reading and Parsing JSON Files Using org.json in Java

Reading and Parsing JSON Files Using org.json in Java

[su_youtube_advanced url=”https://www.youtube.com/watch?v=QpWdENiFvaw”]

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java – Importing JSON into an Eclipse project – Stack Overflow

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• Summary of article content: Articles about java – Importing JSON into an Eclipse project – Stack Overflow Download the ZIP file from this URL and extract it to get the Jar. Add the Jar to your build path. To check the available es in this Jar use this URL. …
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Java JSON – javatpoint

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• Table of Contents:

Features

System Requirements

Step 1 Verify your Java Installation

Step 2 Set your Java Environment

Step 3 Install OrgJson Library

Step 4 Set JSON_JAVA Environment

Step 5 Set CLASSPATH Variable

Example

Output

Example

Output

Example

Output

Example

Output

Example

Output

Example

Output

Example

Output

Example

Output

Example

Output

Example

Output

Example

Output

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Iterating Over an Instance of orgjsonJSONObject

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Importing JSON into an Eclipse project

I’m an aspiring Java programmer looking to use JSON in a project. I was following a programming tutorial (from a book) which asked me to import JSON into my project by using the following line:

import com.google.appengine.repackaged.org.json.JSONArray;

But this produced an error, so I replaced it with this line:

import org.json.JSONArray;

This also produces a (different) error:

The import org.json cannot be resolved

I think the problem is that I don’t actually have the JSON library in my Eclipse workspace. How can I do this, so I can use the JSONArray? I found the website for JSON, but am not sure what to download or how or where to install it:

http://json.org/java/

javatpoint

Java JSON

The json.simple library allows us to read and write JSON data in Java. In other words, we can encode and decode JSON object in java using json.simple library.

The org.json.simple package contains important classes for JSON API.

JSONValue

JSONObject

JSONArray

JsonString

JsonNumber

Install json.simple

To install json.simple, you need to set classpath of json-simple.jar or add the Maven dependency.

1) Download json-simple.jar, Or

2) To add maven dependency, write the following code in pom.xml file.

> >com.googlecode.json-simple> >json-simple> 1.1 >

1) Java JSON Encode

Let’s see a simple example to encode JSON object in java.

import org.json.simple.JSONObject; public class JsonExample1{ public static void main(String args[]){ JSONObject obj=new JSONObject(); obj.put(“name”,”sonoo”); obj.put(“age”,new Integer(27)); obj.put(“salary”,new Double(600000)); System.out.print(obj); }}

Output:

{“name”:”sonoo”,”salary”:600000.0,”age”:27}

Java JSON Encode using Map

Let’s see a simple example to encode JSON object using map in java.

import java.util.HashMap; import java.util.Map; import org.json.simple.JSONValue; public class JsonExample2{ public static void main(String args[]){ Map obj=new HashMap(); obj.put(“name”,”sonoo”); obj.put(“age”,new Integer(27)); obj.put(“salary”,new Double(600000)); String jsonText = JSONValue.toJSONString(obj); System.out.print(jsonText); }}

Output:

{“name”:”sonoo”,”salary”:600000.0,”age”:27}

Java JSON Array Encode

Let’s see a simple example to encode JSON array in java.

import org.json.simple.JSONArray; public class JsonExample1{ public static void main(String args[]){ JSONArray arr = new JSONArray(); arr.add(“sonoo”); arr.add(new Integer(27)); arr.add(new Double(600000)); System.out.print(arr); }}

Output:

[“sonoo”,27,600000.0]

Java JSON Array Encode using List

Let’s see a simple example to encode JSON array using List in java.

import java.util.ArrayList; import java.util.List; import org.json.simple.JSONValue; public class JsonExample1{ public static void main(String args[]){ List arr = new ArrayList(); arr.add(“sonoo”); arr.add(new Integer(27)); arr.add(new Double(600000)); String jsonText = JSONValue.toJSONString(arr); System.out.print(jsonText); }}

Output:

[“sonoo”,27,600000.0]

2) Java JSON Decode

Let’s see a simple example to decode JSON string in java.

import org.json.simple.JSONObject; import org.json.simple.JSONValue; public class JsonDecodeExample1 { public static void main(String[] args) { String s=”{\”name\”:\”sonoo\”,\”salary\”:600000.0,\”age\”:27}”; Object obj=JSONValue.parse(s); JSONObject jsonObject = (JSONObject) obj; String name = (String) jsonObject.get(“name”); double salary = (Double) jsonObject.get(“salary”); long age = (Long) jsonObject.get(“age”); System.out.println(name+” “+salary+” “+age); } }

Output:

sonoo 600000.0 27

Quick Guide

Org.Json – Quick Guide

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org.json – Overview

org.json or JSON-Java is a simple Java based toolkit for JSON. You can use org.json to encode or decode JSON data.

Features

Specification Compliant − JSON.simple is fully compliant with JSON Specification – RFC4627.

Lightweight − It have very few classes and provides the necessary functionalities like encode/decode and escaping json.

XML Conversion − It provides conversion capability from JSON to XML and vice-versa.

HTTP Headers − Supports HTTP Header conversion to JSON and vice versa.

Cookie − Provides support for Cookie conversion to JSON and vice versa.

CDL − Provides support to convert comma separated list to JSON and vice versa.

No dependency − No external library dependency. Can be independently included.

Java 1.6-1.11 compatible − Source code and the binary are Java 1.6-1.11 compatible

org.json – Environment Setup

This chapter takes you through the process of setting up Org.Json on Windows and Linux based systems. Org.Json can be easily installed and integrated with your current Java environment following a few simple steps without any complex setup procedures. User administration is required while installation.

System Requirements

JDK Java SE 2 JDK 1.5 or above Memory 1 GB RAM (recommended) Disk Space No minimum requirement Operating System Version Windows XP or above, Linux

Let us now proceed with the steps to install Org.Json.

Step 1: Verify your Java Installation

First of all, you need to have Java Software Development Kit (SDK) installed on your system. To verify this, execute any of the two commands depending on the platform you are working on.

If the Java installation has been done properly, then it will display the current version and specification of your Java installation. A sample output is given in the following table.

Platform Command Sample Output Windows Open command console and type − \>java –version java version “11.0.11” 2021-04-20 LTS Java(TM) SE Runtime Environment 18.9 (build 11.0.11+9-LTS-194) Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.11+9-LTS-194, mixed mode) Linux Open command terminal and type − $java –version java version “11.0.11” 2021-04-20 LTS Open JDK Runtime Environment 18.9 (build 11.0.11+9-LTS-194) Open JDK 64-Bit Server VM (build 11.0.11+9-LTS-194, mixed mode)

We assume the readers of this tutorial have Java SDK version 11.0.11 installed on their system.

In case you do not have Java SDK, download its current version from www.oracle.com/technetwork/java/javase/downloads/index.html and have it installed.

Step 2: Set your Java Environment

Set the environment variable JAVA_HOME to point to the base directory location where Java is installed on your machine. For example,

Sr.No. Platform & Description 1 Windows Set JAVA_HOME to C:\ProgramFiles\java\jdk11.0.11 2 Linux Export JAVA_HOME = /usr/local/java-current

Append the full path of Java compiler location to the System Path.

Sr.No. Platform & Description 1 Windows Append the String “C:\Program Files\Java\jdk11.0.11\bin” to the end of the system variable PATH. 2 Linux Export PATH = $PATH:$JAVA_HOME/bin/

Execute the command java -version from the command prompt as explained above.

Step 3: Install Org.Json Library

Download the latest version of org.json jar file from org.json @ MVNRepository. At the time of writing this tutorial, we have downloaded json-20211205, and copied it into C:\>JSON folder.

OS Archive name Windows json-20180813.jar Linux json-20180813.jar Mac json-20180813.jar

Step 4: Set JSON_JAVA Environment

Set the JSON_JAVA environment variable to point to the base directory location where org.json jar is stored on your machine. Let’s assuming we’ve stored json-20211205.jar in the JSON folder.

Sr.No OS & Description 1 Windows Set the environment variable JSON_JAVA to C:\JSON 2 Linux export JSON_JAVA = /usr/local/JSON 3 Mac export JSON_JAVA = /Library/JSON

Step 5: Set CLASSPATH Variable

Set the CLASSPATH environment variable to point to the JSON.simple jar location.

Sr.No OS & Description 1 Windows Set the environment variable CLASSPATH to %CLASSPATH%;%JSON_JAVA%\json-20211205.jar;.; 2 Linux export CLASSPATH = $CLASSPATH:$JSON_JAVA/json-20211205.jar:. 3 Mac export CLASSPATH = $CLASSPATH:$JSON_JAVA/json-20211205.jar:.

org.json – CDL

CDL class provides static methods to convert a comma delimited text into a JSONArray, and vice versa.

Following methods are covered in the example.

rowToJSONArray(String) − Converts a comma delimited text to JSONArray Object.

rowToString(JSONArray) − Converts a JSONArray to comma delimited text.

toJSONArray(String) − Converts a multi-line comma delimited text to Object of JSONArray objects.

toJSONArray(JSONArray, String) − Converts a JSONArray Object and comma delimited text to JSONArray Object.

Example

import org.json.CDL; import org.json.JSONArray; import org.json.JSONTokener; public class JSONDemo { public static void main(String[] args) { String csvData = “INDIA, UK, USA”; //Case 1: CSV to JSON Array JSONArray jsonArray = CDL.rowToJSONArray(new JSONTokener(csvData)); System.out.println(jsonArray); //Case 2: JSONArray to CSV System.out.println(CDL.rowToString(jsonArray)); //Case 3: CSV to JSONArray of Objects csvData = “empId, name, age

” + “1, Mark, 22

” + “2, Robert, 35

” + “3, Julia, 18”; System.out.println(CDL.toJSONArray(csvData)); //Case 4: CSV without header jsonArray = new JSONArray(); jsonArray.put(“empId”); jsonArray.put(“name”); jsonArray.put(“age”); csvData = “1, Mark, 22

” + “2, Robert, 35

” + “3, Julia, 18”; System.out.println(CDL.toJSONArray(jsonArray,csvData)); } }

Output

[“INDIA”,”UK”,”USA”] INDIA,UK,USA [{“name”:”Mark”,”empId”:”1″,”age”:”22″}, {“name”:”Robert”,”empId”:”2″,”age”:”35″}, {“name”:”Julia”,”empId”:”3″,”age”:”18″}] [{“name”:”Mark”,”empId”:”1″,”age”:”22″}, {“name”:”Robert”,”empId”:”2″,”age”:”35″}, {“name”:”Julia”,”empId”:”3″,”age”:”18″}]

org.json – Cookie

Cookie class provides static methods to convert web browser’s cookie text into a JSONObject, and vice versa.

Following methods are covered in the example.

toJSONObject(String) − Converts a cookie text to JSONObject Object.

toString(JSONObject) − Converts a JSONObject to cookie text.

Example

import org.json.Cookie; import org.json.JSONObject; public class JSONDemo { public static void main(String[] args) { String cookie = “username = Mark Den; expires = Thu, 15 Jun 2020 12:00:00 UTC; path = /”; //Case 1: Converts Cookie String to JSONObject JSONObject jsonObject = Cookie.toJSONObject(cookie); System.out.println(jsonObject); //Case 2: Converts JSONObject to Cookie String System.out.println(Cookie.toString(jsonObject)); } }

Output

{“path”:”/”,”expires”:”Thu, 15 Jun 2020 12:00:00 UTC”,”name”:”username”,”value”:”Mark Den”} username=Mark Den;expires=Thu, 15 Jun 2020 12:00:00 UTC;path=/

org.json – CookieList

CookieList class provides static methods to convert Cookie List to JSONObject, and vice versa. Cookie List is a sequence of name/value pairs.

Following methods are covered in the example.

toJSONObject(String) − Converts a cookie list text to JSONObject Object.

toString(JSONObject) − Converts a JSONObject to cookie list text.

Example

import org.json.Cookie; import org.json.CookieList; import org.json.JSONObject; public class JSONDemo { public static void main(String[] args) { String cookie = “username = Mark Den; expires = Thu, 15 Jun 2020 12:00:00 UTC; path = /”; //Case 1: Converts Cookie String to JSONObject JSONObject cookieJSONObject = Cookie.toJSONObject(cookie); JSONObject cookielistJSONObject = new JSONObject(); cookielistJSONObject.put(cookieJSONObject.getString(“name”), cookieJSONObject.getString(“value”)); String cookieList = CookieList.toString(cookielistJSONObject); System.out.println(cookieList); System.out.println(CookieList.toJSONObject(cookieList)); } }

Output

username=Mark Den {“username”:”Mark Den”}

org.json – HTTP

HTTP class provides static methods to convert web browser’s header text into a JSONObject, and vice versa.

Following methods are covered in the example.

toJSONObject(String) − Converts a header text to JSONObject Object.

toString(JSONObject) − Converts a JSONObject to header text.

Example

import org.json.HTTP; import org.json.JSONObject; public class JSONDemo { public static void main(String[] args) { JSONObject jsonObject = new JSONObject(); jsonObject.put(“Method”, “POST”); jsonObject.put(“Request-URI”, “http://www.tutorialspoint.com/”); jsonObject.put(“HTTP-Version”, “HTTP/1.1”); //Case 1: Converts JSONObject of Header to String String headerText = HTTP.toString(jsonObject); System.out.println(headerText); headerText = “POST \”http://www.tutorialspoint.com/\” HTTP/1.1″; //Case 2: Converts Header String to JSONObject System.out.println(HTTP.toJSONObject(headerText)); } }

Output

POST “http://www.tutorialspoint.com/” HTTP/1.1 {“Request-URI”:”http://www.tutorialspoint.com/”,”Method”:”POST”,”HTTP-Version”:”HTTP/1.1″}

org.json – JSONArray

A JSONArray is an ordered sequence of values. It provides methods to access values by index and to put values. Following types are supported −

Boolean

JSONArray

JSONObject

Number

String

JSONObject.NULL object

Example

import org.json.JSONArray; import org.json.JSONObject; public class JSONDemo { public static void main(String[] args) { JSONArray list = new JSONArray(); list.put(“foo”); list.put(new Integer(100)); list.put(new Double(1000.21)); list.put(new Boolean(true)); list.put(JSONObject.NULL); System.out.println(“JSONArray: “); System.out.println(list); } }

Output

JSONArray: [“foo”,100,1000.21,true,null]

org.json – JSONML

JSONML class provides static methods to convert a XML text into a JSONArray, and vice versa.

Following methods are covered in the example.

toJSONArray(String) − Converts a XML to JSONArray Object.

toJSONObject(String) − Converts a XML to JSONObject Object.

toString(JSONArray) − Gives a XML from a JSONArray Object.

toString(JSONObject) − Gives a XML from a JSONObject Object.

Example

import org.json.JSONArray; import org.json.JSONML; import org.json.JSONObject; public class JSONDemo { public static void main(String[] args) { JSONArray list = new JSONArray(); list.put(“name”); list.put(“Robert”); System.out.println(“XML from a JSONArray: “); String xml = JSONML.toString(list); System.out.println(xml); System.out.println(“JSONArray from a XML: “); list = JSONML.toJSONArray(xml); System.out.println(list); System.out.println(“JSONObject from a XML: “); JSONObject object = JSONML.toJSONObject(xml); System.out.println(object); System.out.println(“XML from a JSONObject: “); xml = JSONML.toString(object); System.out.println(xml); } }

Output

XML from a JSONArray: Robert JSONArray from a XML: [“name”,”Robert”] JSONObject from a XML: {“childNodes”:[“Robert”],”tagName”:”name”} XML from a JSONObject: Robert

org.json – JSONObject

JSONObject class is a unordered collection of key-value pairs. It provides methods to access values by key and to put values. Following types are supported −

Boolean

JSONArray

JSONObject

Number

String

JSONObject.NULL object

Example

import org.json.JSONArray; import org.json.JSONObject; public class JSONDemo { public static void main(String[] args) { JSONObject jsonObject = new JSONObject(); jsonObject.put(“Name”, “Robert”); jsonObject.put(“ID”, 1); jsonObject.put(“Fees”, new Double(1000.21)); jsonObject.put(“Active”, new Boolean(true)); jsonObject.put(“Other Details”, JSONObject.NULL); JSONArray list = new JSONArray(); list.put(“foo”); list.put(new Integer(100)); jsonObject.put(“list”,list); System.out.println(jsonObject); } }

Output

{“Active”:true,”Other Details”:null,”ID”:1,”Fees”:1000.21,”list”:[“foo”,100],”Name”:”Robert”}

org.json – JSONStringer

JSONStringer is a utility class to build a JSON Text quickly which confirms to JSON Syntax rules. Each instance of JSONStringer can produce one JSON text.

Example

import org.json.JSONStringer; public class JSONDemo { public static void main(String[] args) { String jsonText = new JSONStringer() .object() .key(“Name”) .value(“Robert”) .endObject() .toString(); System.out.println(jsonText); jsonText = new JSONStringer() .array() .value(“Robert”) .value(“Julia”) .value(“Dan”) .endArray() .toString(); System.out.println(jsonText); jsonText = new JSONStringer() .array() .value(“Robert”) .value(“Julia”) .value(“Dan”) .object() .key(“Name”) .value(“Robert”) .endObject() .endArray() .toString(); System.out.println(jsonText); } }

Output

{“Name”:”Robert”} [“Robert”,”Julia”,”Dan”] [“Robert”,”Julia”,”Dan”,{“Name”:”Robert”}]

org.json – Property

Property class provides static methods to convert properties text into a JSONObject, and vice versa.

Following methods are covered in the example.

toJSONObject(Properties) − Converts a properties data to JSONObject Object.

toProperties(JSONObject) − Converts a JSONObject to properties object.

Example

import java.util.Properties; import org.json.JSONObject; import org.json.Property; public class JSONDemo { public static void main(String[] args) { Properties properties = new Properties(); properties.put(“title”, “This is a title text”); properties.put(“subtitle”, “This is a subtitle text”); System.out.println(“Properties to JSON”); JSONObject jsonObject = Property.toJSONObject(properties); System.out.println(jsonObject); System.out.println(“JSON to properties”); System.out.println(Property.toProperties(jsonObject)); } }

Output

Properties to JSON {“subtitle”:”This is a subtitle text”,”title”:”This is a title text”} JSON to properties {subtitle = This is a subtitle text, title = This is a title text}

org.json – XML

XML class provides static methods to convert a XML text into a JSONObject, and vice versa.

Following methods are covered in the example.

toJSONObject(String) − Converts a XML to JSONArray Object.

toString(JSONObject) − Gives a XML from a JSONObject Object.

Example

import org.json.JSONObject; import org.json.XML; public class JSONDemo { public static void main(String[] args) { JSONObject jsonObject = new JSONObject(); jsonObject.put(“Name”, “Robert”); jsonObject.put(“ID”, 1); jsonObject.put(“Fees”, new Double(1000.21)); jsonObject.put(“Active”, new Boolean(true)); jsonObject.put(“Details”, JSONObject.NULL); //Convert a JSONObject to XML String xmlText = XML.toString(jsonObject); //Convert an XML to JSONObject System.out.println(XML.toJSONObject(xmlText)); } }

Output

true

null

11000.21Robert {“Active”:true,”Details”:null,”ID”:1,”Fees”:1000.21,”Name”:”Robert”}

org.json – JSONException Handling

Utility classes of org.json throws JSONException in case of invalid JSON. Following example shows how to handle JSONException.

Example

import org.json.JSONException; import org.json.XML; public class JSONDemo { public static void main(String[] args) { try{ //XML tag name should not have space. String xmlText = “null“; System.out.println(xmlText); //Convert an XML to JSONObject System.out.println(XML.toJSONObject(xmlText)); } catch(JSONException e){ System.out.println(e.getMessage()); } } }

Output

null Misshaped close tag at 34 [character 35 line 1]

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