json array example in java

How to create correct JSONArray in Java using JSONObject

stackoverflow.com › questions › 18983185 › how-to-create-correct-jsonarray-in-java-using-jsonobject

Here is some code using java 6 to get you started:

JSONObject jo = new JSONObject();
jo.put("firstName", "John");
jo.put("lastName", "Doe");

JSONArray ja = new JSONArray();
ja.put(jo);

JSONObject mainObj = new JSONObject();
mainObj.put("employees", ja);

Edit: Since there has been a lot of confusion about put vs add here I will attempt to explain the difference. In java 6 org.json.JSONArray contains the put method and in java 7 javax.json contains the add method.

An example of this using the builder pattern in java 7 looks something like this:

JsonObject jo = Json.createObjectBuilder()
  .add("employees", Json.createArrayBuilder()
    .add(Json.createObjectBuilder()
      .add("firstName", "John")
      .add("lastName", "Doe")))
  .build();

Answer from Grammin on Stack Overflow

Stack Overflow

stackoverflow.com › questions › 18983185 › how-to-create-correct-jsonarray-in-java-using-jsonobject

json - How to create correct JSONArray in Java using JSONObject - Stack Overflow

Top answer

1 of 4

282

Here is some code using java 6 to get you started:

JSONObject jo = new JSONObject();
jo.put("firstName", "John");
jo.put("lastName", "Doe");

JSONArray ja = new JSONArray();
ja.put(jo);

JSONObject mainObj = new JSONObject();
mainObj.put("employees", ja);

An example of this using the builder pattern in java 7 looks something like this:

JsonObject jo = Json.createObjectBuilder()
  .add("employees", Json.createArrayBuilder()
    .add(Json.createObjectBuilder()
      .add("firstName", "John")
      .add("lastName", "Doe")))
  .build();

2 of 4

I suppose you're getting this JSON from a server or a file, and you want to create a JSONArray object out of it.

String strJSON = ""; // your string goes here
JSONArray jArray = (JSONArray) new JSONTokener(strJSON).nextValue();
// once you get the array, you may check items like
JSONOBject jObject = jArray.getJSONObject(0);

Hope this helps :)

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More results from stackoverflow.com

Oracle

docs.oracle.com › javaee › 7 › api › javax › json › JsonArray.html

JsonArray (Java(TM) EE 7 Specification APIs)

JsonArray represents an immutable JSON array (an ordered sequence of zero or more values). It also provides an unmodifiable list view of the values in the array.

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How to create correct JSONArray in Java using JSONObject

What is the correct structure and approach to combine multiple JSON objects into a well-formed JSON array? Log in to share your answer and help other learners. Log in to answer ... To correctly create a JSONArray in Java using JSONObject, you need to follow a structured approach: first build ... More on janbasktraining.com

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June 28, 2022

using JSONArray, JSONObject etc. to parse JSON with Java

I'd highly advise you to use the ObjectMapper instead of JSONArray and JSONObject. Try to mimic the json objects structure with a class, create 0 field and all argument contrstructors, getters and setters and simply use new ObjectMapper().readValue(yourJsonString, YouMappedObject.class) More on reddit.com

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