Android File Extension Name Get getFileExtensionFromName(String filename)

Description

get File Extension From Name

License

Apache License

Declaration

public static String getFileExtensionFromName(String filename) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {

    public static String getFileExtensionFromName(String filename) {
        if (filename == null) {
            return null;
        }/*from  w w w.ja  v  a 2 s  .c  om*/
        int index = indexOfExtension(filename);
        if (index == -1) {
            return "";
        } else {
            return filename.substring(index + 1);
        }
    }

    private static int indexOfExtension(String filename) {
        if (filename == null) {
            return -1;
        }
        int extensionPos = filename.lastIndexOf(".");
        int lastSeparator = filename.lastIndexOf("/");
        return (lastSeparator > extensionPos ? -1 : extensionPos);
    }
}

Related

1. getFileExtByFileName(String fileName)
2. getFileExtension(String file)
3. getFileExtension(String fileName)
4. getFileExtension(String filename)
5. getFileExtension(String filename, String defExt)
6. getFileExtensionFromSource(byte[] picHeader)
7. getFileExtensionFromUrl(String url)
8. getFilenameExtension(String path)
9. getNameMinusExtension(File file)