Here you can find the source of isURL(Object obj)
public static boolean isURL(Object obj)
//package com.java2s; /*/*from w w w .j a v a 2 s. co m*/ * Copyright (c) 2012-2014 Veniamin Isaias. * * This file is part of web4thejob. * * Web4thejob is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or any later version. * * Web4thejob 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with web4thejob. If not, see <http://www.gnu.org/licenses/>. */ import java.net.URL; public class Main { public static boolean isURL(Object obj) { try { new URL(obj.toString()); return true; } catch (Exception e) { return false; } } }