how to read value key form a Json Element in Java

Question

I have a jsonElement as following how can I retrieve "value2" with minimal amount of coding?

{
  "key1": "value1",
  "key2": "value2",
  "key3": "value3"
}

https://stackoverflow.com/questions/2591098/how-to-parse-json-in-java — Idos, Apr 04 '19 at 23:24
https://stackoverflow.com/questions/31094305/java-gson-getting-the-list-of-all-keys-under-a-jsonobject — javapedia.net, Apr 04 '19 at 23:25
Possible duplicate of [How to parse JSON in Java](https://stackoverflow.com/questions/2591098/how-to-parse-json-in-java) — CryptoFool, Apr 04 '19 at 23:32

score 1 · Answer 1 · edited Apr 05 '19 at 05:10

1

Add jar in your project : org.json.

Suppose that you are having string,

String yourString = "{ \"key1\": \"value1\",\"key2\": \"value2\",\"key3\":\"value3\" }"

JSONObject jsonObj = new JSONObject(yourString);

First of all, check the desired key which you want to access to avoid nullPointer exception , then access you value . i.e.

Note: It is always a good practice to check whether this exists but in your case not mandatory

if(jsonObj.contains("key2") {  

 String key2 = jsonObj.getString("key2");
}

edited Apr 05 '19 at 05:10

Vishwa Ratna

answered Apr 05 '19 at 03:55

ASK

1 Answers1