CODEWITHSUNDEEP
javajson
user1634079
user1634079

Reputation: 3

JSON string to a String array in java

JSONArray cities = json.getJSONArray("city");

With the above code got the following output:

{
"id":"1",
"name":"London"
"country":"United Kingdom"
},

{
"id":"2",
"name":"Madrid"
"country":"Spain"
},

{"id":"3",
"name":"Paris"
"country":"France"
},

{
"id":"3",
"name":"Zurich"
"country":"Switzerland"
}

How can I get only the name from the JSON array to a string array?

e.g.: String[] s ={"London","Madrid","Paris","Zurich"}

Upvotes: 0

Views: 191

Answers (5)

kalle
kalle

Reputation: 1909

Use JsonPath http://code.google.com/p/json-path/

<dependency>
    <groupId>com.jayway.jsonpath</groupId>
    <artifactId>json-path</artifactId>
    <version>0.8.1</version>
</dependency>

you can get all city names 

String rawJsonString = "...";
List<String> cities = JsonPath.read(rawJsonString, "$.city[*].name");

Upvotes: 0

Dunes
Dunes

Reputation: 40903

You could try using a library like JsonPath.

Code would go something like this:

String rawJsonString = ...;
List<String> cities = JsonPath.read(rawJsonString, "$.city.name");

Upvotes: 0

jtahlborn
jtahlborn

Reputation: 53694

cities is an array of JSONObjects. iterate through that array of JSONObjects, and get the "name" attribute from each. See @pb2q's answer where the code has been conveniently written for you.

Upvotes: 1

pb2q
pb2q

Reputation: 59677

Loop through the JSONArray and pull out the "name" fields. This is done similarly to your json.getJSONArray("city"); call, only in a loop:

JSONArray cities = json.getJSONArray("city");
JSONObject city = null;
String[] s = new String[cities.length()];

for (int i = 0; i < cities.length(); i++)
{
    city = cities.getJsonObject(i);
    s[i] = city.get("name");
}

Upvotes: 0

Ransom Briggs
Ransom Briggs

Reputation: 3095

// you should probably mention what json library you use in your question
String[] cities = new String[cities.length()];
for (int i = 0; i<cities.length(); i++) {
    cities[i] = cities.getJsonObject(i).getString("name");
}

Upvotes: 1

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