Here you can find the source of tail(String path)
public static String tail(String path)
//package com.java2s; /*//from w w w .j a v a 2 s. c o m * ==================================================================== * Copyright (c) 2004-2012 TMate Software Ltd. All rights reserved. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms * are also available at http://svnkit.com/license.html * If newer versions of this license are posted there, you may use a * newer version instead, at your option. * ==================================================================== */ public class Main { public static String tail(String path) { int index = path.length() - 1; if (index >= 0 && index < path.length() && path.charAt(index) == '/') { index--; } for (int i = index; i >= 0; i--) { if (path.charAt(i) == '/') { return path.substring(i + 1, index + 1); } } return path; } }