Tłumacz językowy

import org.apache.commons.io.IOUtils;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;

enum Language {

	PL ("pl"),
	EN ("en"),
	ES ("es"),
	FR ("fr"),
	PT ("pl"),
	DE ("de");

	private final String languageName;

	private Language(String languageName) {
		this.languageName = languageName;
	}

	@Override
	public String toString() {
		return languageName;
	}
}

public class Translator {

	private final String engineURL = "http://api.mymemory.translated.net/get?q=";
	private String text;
	private Language from, to;

	public Translator(Language from, Language to) {
		this.to = to;
		this.from = from;
	}

	private URL prepareURL() throws UnsupportedEncodingException, MalformedURLException {
		String restUrl = engineURL + URLEncoder.encode(text,"UTF-8") +
				"&langpair="+from.toString()+"|"+to.toString();
		return new URL(restUrl);
	}

	public String execute(String text) throws IOException {
		this.text = text;
		HttpURLConnection conn = null;
		String translatedText = "";

		try {
			URL url = prepareURL();
			conn = (HttpURLConnection) url.openConnection();

			if(conn.getResponseCode() != HttpURLConnection.HTTP_OK) {
				conn.disconnect();
				return "";
			}

			String page = IOUtils.toString(conn.getInputStream());

			JSONObject obj = new JSONObject(page);
			translatedText = obj.getJSONObject("responseData").getString("translatedText");

		} catch (UnsupportedEncodingException | MalformedURLException uee) {
			uee.printStackTrace();
		} catch (JSONException | IOException je) {
			je.printStackTrace();
			System.out.println(je.getMessage());
		} finally {
			if(conn != null)
				conn.disconnect();
		}
		return translatedText;
	}
}