java - Using Gson to unserialize an array of objects -

i have json response looks this. want extract values of "text" , put them set of strings (i.e. don't need entire json derialised).

i using gson library

so far method looks (it's wrong):

 public static response deserialise(string json){   gson gson = new gson();   response r = gson.fromjson(json, response.class);   return r;  } 

i calling deserialise this:

response r = deserialise(json); system.out.println("[status]: "+r.getstatus());  // works fine         collection<keyword> coll = r.getkeywords();         iterator<keyword> itr = coll.iterator();         while(itr.hasnext()){ system.out.println(itr.next().getword());        //prints null every time  } 

response class following member variables (with getters , setters):

private string status; private string usage; private string language; private collection<keyword> keywords;  

keyword class following member variables (with getters , setters):

private string word; private string relevance; 

the json looks this:

{ "status": "ok", "usage": "by accessing alchemyapi or using information generated alchemyapi, agreeing bound alchemyapi terms of use: http://www.alchemyapi.com/company/terms.html", "url": "http://www.theage.com.au/world/aussie-trying-to-make-a-difference-gunned-down-20110510-1egnv.html", "language": "english", "keywords": [     {         "text": "mr mcnichols",         "relevance": "0.99441"     },     {         "text": "ms benton",         "relevance": "0.392337"     },     {         "text": "detroit",         "relevance": "0.363931"     },     {         "text": "crocodile hunter",         "relevance": "0.350197"     }     ] } 

the problem collection of keywords returns null values - although seems have correct size, positive.

this works:

public class keyword {     public string text;     public string relevance; }   public class myjson {     public string status;     public string usage;     public string language;     public collection<keyword> keywords; } 

in main method

        string str = "{\"status\": \"ok\","+         "\"usage\": \"by accessing alchemyapi or using information generated alchemyapi, agreeing bound alchemyapi terms of use: http://www.alchemyapi.com/company/terms.html\","+         "\"url\": \"http://www.theage.com.au/world/aussie-trying-to-make-a-difference-gunned-down-20110510-1egnv.html\","+         "\"language\": \"english\","+         "\"keywords\": ["+             "{"+                 "\"text\": \"mr mcnichols\","+                 "\"relevance\": \"0.99441\""+             "},"+             "{"+                 "\"text\": \"ms benton\","+                 "\"relevance\": \"0.392337\""+             "},"+             "{"+                 "\"text\": \"detroit\","+                 "\"relevance\": \"0.363931\""+             "},"+             "{"+                 "\"text\": \"crocodile hunter\","+                 "\"relevance\": \"0.350197\""+             "}"+             "]"+         "}";          gson gson = new gson();         myjson mj = gson.fromjson(str, myjson.class);         system.out.println(mj.language);         for(keyword k: mj.keywords)             system.out.println(k.text+":"+k.relevance); 

this prints

english mr mcnichols:0.99441 ms benton:0.392337 detroit:0.363931 crocodile hunter:0.350197 

look @ keyword class!(and json string starts {).