Here you can find the source of fileToURL(File file)
public static URL fileToURL(File file)
//package com.java2s; /**//from w w w . j a v a 2s. c om * Logback: the reliable, generic, fast and flexible logging framework. * Copyright (C) 1999-2011, QOS.ch. All rights reserved. * * This program and the accompanying materials are dual-licensed under * either the terms of the Eclipse Public License v1.0 as published by * the Eclipse Foundation * * or (per the licensee's choosing) * * under the terms of the GNU Lesser General Public License version 2.1 * as published by the Free Software Foundation. */ import java.io.File; import java.net.MalformedURLException; import java.net.URL; public class Main { public static URL fileToURL(File file) { try { return file.toURI().toURL(); } catch (MalformedURLException e) { throw new RuntimeException("Unexpected exception on file [" + file + "]", e); } } }