Java tutorial
package com.wanikani.wklib; import java.net.MalformedURLException; import java.net.URL; import java.util.Date; 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 Util { public static String getString(JSONObject obj, String key) throws JSONException { return obj.isNull(key) ? null : obj.getString(key); } public static int getInt(JSONObject obj, String key) throws JSONException { return obj.getInt(key); } public static boolean getBoolean(JSONObject obj, String key) throws JSONException { return obj.getBoolean(key); } public static Date getDate(JSONObject obj, String key) throws JSONException { return obj.isNull(key) || obj.getLong(key) == 0 ? null : new Date(obj.getLong(key) * 1000); } public static URL getURL(JSONObject obj, String key) throws JSONException { String s; try { s = getString(obj, key); return s != null ? new URL(s) : null; } catch (MalformedURLException e) { throw new JSONException(e.getMessage()); } } }