Java File Name Get getFilename(String fullFilename)

Description

Get filename from full path.

License

Apache License

Parameter

Parameter	Description
fullFilename	full path. eg. d:/a/bb/ccc.jar

Declaration

public static String getFilename(String fullFilename) 

Method Source Code

//package com.java2s;
/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved./*from w  w  w .java 2s. c  om*/
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import java.io.File;

public class Main {
    /**
     * Get filename from full path.
     * If parameter is d:/a/bb/ccc.jar, then you get ccc.jar.
     * 
     * @param fullFilename full path. eg. d:/a/bb/ccc.jar
     * @return
     */
    public static String getFilename(String fullFilename) {
        int pos = fullFilename.lastIndexOf(File.separatorChar);
        return fullFilename.substring(pos + 1);
    }

    /**
     * Gets a substring of the specified string avoiding exceptions.
     * A negative start position can be used to start n characters from
     * the end of the string.
     * 
     * @param str  the string to get the substring from
     * @param start  the position to start from,  negative means 
     * count back from the end of the string by this many characters
     * @return substring from start position
     */
    public static String substring(String str, int start) {
        if (str == null) {
            return null;
        }

        // handle negatives, which means last n characters
        if (start < 0) {
            start = str.length() + start; // remember start is negative
        }

        if (start < 0) {
            start = 0;
        }
        if (start > str.length()) {
            return "";
        }

        return str.substring(start);
    }

    /**
     * Gets a substring of the specified string avoiding exceptions.
     * A negative start position can be used to start/end n characters
     * from the end of the string.
     * 
     * @param str  the string to get the substring from
     * @param start  the position to start from, negative means 
     * count back from the end of the string by this many characters
     * @param end  the position to end at (exclusive),  negative means 
     * count back from the end of the string by this many characters
     * @return substring from start position to end positon
     */
    public static String substring(String str, int start, int end) {
        if (str == null) {
            return null;
        }

        // handle negatives
        if (end < 0) {
            end = str.length() + end; // remember end is negative
        }
        if (start < 0) {
            start = str.length() + start; // remember start is negative
        }

        // check length next
        if (end > str.length()) {
            // check this works.
            end = str.length();
        }

        // if start is greater than end, return ""
        if (start > end) {
            return "";
        }

        if (start < 0) {
            start = 0;
        }
        if (end < 0) {
            end = 0;
        }

        return str.substring(start, end);
    }
}

Related

1. getFileName(String filePath)
2. getFileName(String filepath)
3. getFileName(String filePath)
4. getFileName(String filePath)
5. getFileName(String folder, final String path)
6. getFileName(String localRootDirName, String ending)
7. getFileName(String name)
8. getFileName(String originPath)
9. getFilename(String path)