How to add a String Array in a JSON object?

Question

I am trying to create this JSON object on android. I am stuck on how to add a string array in the object.

A = {
    \"class\" : \"4\" ,
    \"name\" : [\"joh         


        

Answer 1

@bhavindesai's, answer is great answer. Here is another way to solve this issue. You can simply do it using Json Simple library. Here is the gradle

compile 'com.googlecode.json-simple:json-simple:1.1'

Here is sample code:

org.json.simple.JSONObject jsonObject=new org.json.simple.JSONObject();
jsonObject.put("Object","String Object");

ArrayList<String> list = new ArrayList<String>();
            list.add("john");
            list.add("mat");
            list.add("jason");
            list.add("matthew");

            jsonObject.put("List",list);

That's it. :)

Answer 2

As bhavindesai noted,

ArrayList<String> list = new ArrayList<String>();
list.add("john");
list.add("mat");
list.add("jason");
list.add("matthew");

JSONObject school = new JSONObject();

school.put("class","4");
school.put("name", new JSONArray(list));

is a much better and cleaner approach.

To import the right package you should write:

import org.json.simple.JSONArray;

on top of java class.

And if you are using Maven, add

 <dependency>
    <groupId>com.googlecode.json-simple</groupId>
    <artifactId>json-simple</artifactId>
    <version>1.1</version>  
</dependency>

to pom.xml. Then, Download sources & dependencies and Reimport. I answered though I used commenting, since commenting screwed up the code indentation.

Answer 3

You are getting error because of this.

school.put("name", ["john", "mat", "jason", "matthew"] );
                   ^                                 ^   

Do like this.

school.put("name", new JSONArray("[\"john\", \"mat\", \"jason\", \"matthew\"]"));

Answer 4

Little improper approach suggested by Tom. Optimised code would be:

ArrayList<String> list = new ArrayList<String>();
list.add("john");
list.add("mat");
list.add("jason");
list.add("matthew");

JSONObject school = new JSONObject();

school.put("class","4");
school.put("name", new JSONArray(list));

Answer 5

You're getting an error because your last line is invalid Java.

school.put("name", new JSONArray("[\"john\", \"mat\", \"jason\", \"matthew\"]"));