Don't extract Tool.jar, it should work then.

Well there isn't much to say about this... it's just a text file searcher, I like the idea tho.

Tips:
Use OkHttp and JSoup libraries together to have real time market listings, use okhttp to request the market page and jsoup to parse the response html, doing so will allow you to have a real time market items list without much effort.

Use regex to search items, if you manage to write the correct regex, users will be able to search for an item by only using part of their name and it could be case insensitive aswell.

Feel free to contact me on IRC if you need help