Question

I’m trying to parse a local json file and the output is not what it’s supposed to show.
I have little experience with Json (and Gson) so I’m unclear as to what the problem is.

Here is the tweet class:

    public class tweet {
         String from_user;
         String from_user_name;
         String profile_image_url;
         String text;

    public tweet(){
        //empty constructor
            }
}

This is the class where Gson is used:

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import com.google.gson.Gson;

public class tweetfeedreader {
    public static void main(String args[]) throws FileNotFoundException {
        Gson gson = new Gson();
        BufferedReader bufferedReader = new BufferedReader(new FileReader(
                "C:/Users/LILITH/Desktop/jsonfile.json"));
        tweet J_tweet = gson.fromJson(bufferedReader, tweet.class);
        System.out.println(J_tweet);
    }
}

Lastly, the .json file which i have saved onto a local directory:
http://search.twitter.com/search.json?q=%40android

there are no errors, but the output is:

tweet@3030d5aa

I’m uncertain as to what might be going wrong, so thanks for your guidance!

[Edit: I forgot to add that I have searched SO before and read the related posts. They may be similar but I am not having much luck in piecing the pieces together.]

Answer 1

Strip the results array out of that json, leaving nothing outside the []s.

Then this was just about the least I could modify the code to get it working:

import java.lang.reflect.*;
import java.io.*;
import java.util.*;
import com.google.gson.*;
import com.google.gson.reflect.*;

public class tweetfeedreader {
  public static void main(String args[]) throws IOException {
    Gson gson = new Gson();
    BufferedReader bufferedReader = new BufferedReader(new FileReader(
            "jsonfile.json"));
    String line;
    StringBuilder sb = new StringBuilder();
    while ((line = bufferedReader.readLine()) != null) sb.append(line);
    Type tweetCollection = new TypeToken<Collection<tweet>>(){}.getType();
    Collection<tweet> tweets = gson.fromJson(line, tweetCollection);
    for (final tweet t : tweets) System.out.println(t.text);
  }
}