Java tutorial
package com.wanikani.wklib; import java.io.IOException; import org.json.JSONException; import org.json.JSONObject; /* * Copyright (c) 2013 Alberto Cuda * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class ApplicationException extends IOException { private static final long serialVersionUID = 1L; String code; public ApplicationException(String code, String msg) { super(msg); this.code = code; } public static ApplicationException buildFromJSON(JSONObject obj) throws IOException { String code; String msg; try { obj = obj.getJSONObject("error"); code = obj.getString("code"); msg = obj.getString("message"); } catch (JSONException e) { throw new ParseException(); } if (code.equals(AuthenticationException.CODE_STRING)) throw new AuthenticationException(code, msg); return new ApplicationException(code, msg); } }