Here you can find the source of toURI(File f)
public static URI toURI(File f) throws URISyntaxException
//package com.java2s; /*// w ww . ja v a 2 s .c om * * 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.io.*; import java.net.URI; import java.net.URISyntaxException; public class Main { public static URI toURI(File f) throws URISyntaxException { String s = f.getAbsolutePath(); if (File.separatorChar != '/') { s = s.replace(File.separatorChar, '/'); } if (!s.startsWith("/")) { s = "/" + s; } if (!s.endsWith("/") && f.isDirectory()) { s = s + "/"; } return new URI("file", s, null); } }