Here you can find the source of isURL(String name)
private static boolean isURL(String name)
//package com.java2s; /**// www . j av a 2 s.c o m * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.net.URI; import java.net.URL; public class Main { private static boolean isURL(String name) { try { new URL(name); return true; } catch (Exception e) { return false; } } private static boolean isURL(URI name) { try { name.toURL(); return true; } catch (Exception e) { return false; } } }