How do I parse JSON from a Java HTTPResponse?

Question

I have an HttpResponse object for a web request I just made. The response is in the JSON format, so I need to parse it. I can do it in an absurdly complex way, but it seems like there must be a better way.

Is this really the best I can do?

    HttpResponse response; // some response object     Reader in = new BufferedReader(         new InputStreamReader(response.getEntity().getContent(), "UTF-8"));     StringBuilder builder= new StringBuilder();     char[] buf = new char[1000];     int l = 0;     while (l >= 0) {         builder.append(buf, 0, l);         l = in.read(buf);     }     JSONTokener tokener = new JSONTokener( builder.toString() );     JSONArray finalResult = new JSONArray( tokener ); 

I'm on Android if that makes any difference.

Answer 1

Two things which can be done more efficiently:

1. Use StringBuilder instead of StringBuffer since it's the faster and younger brother.
2. Use BufferedReader#readLine() to read it line by line instead of reading it char by char.

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HttpResponse response; // some response object BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8")); StringBuilder builder = new StringBuilder(); for (String line = null; (line = reader.readLine()) != null;) {     builder.append(line).append("\n"); } JSONTokener tokener = new JSONTokener(builder.toString()); JSONArray finalResult = new JSONArray(tokener); 

If the JSON is actually a single line, then you can also remove the loop and builder.

HttpResponse response; // some response object BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8")); String json = reader.readLine(); JSONTokener tokener = new JSONTokener(json); JSONArray finalResult = new JSONArray(tokener);