Java Utililty Methods File Extension Name Get

List of utility methods to do File Extension Name Get

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Description

The list of methods to do File Extension Name Get are organized into topic(s).

Method

StringextractExtension(final String fileName)
Extract the file extension from a string. 
final int dotIndex = fileName.lastIndexOf('.');
if (dotIndex != -1) {
    return fileName.substring(dotIndex + 1);
} else {
    return null;
StringextractExtension(String fileName)
Extract the file-extension 
String extension = null;
if (fileName == null) {
    extension = "";
} else {
    int place = fileName.lastIndexOf('.');
    if (place >= 0) {
        extension = fileName.substring(place + 1);
    } else {
...
StringextractExtension(String name)
extract Extension 
if (name == null)
    return null;
int dot = name.lastIndexOf('.');
if (dot > -1 && dot < name.length() - 1)
    return name.substring(dot + 1, name.length());
else
    return null;
StringextractExtension(String s)
does not include the dot. 
int index = s.lastIndexOf(".");
if (index < 0)
    return "";
return s.substring(index + 1, s.length());
StringextractExtension(String strFilename)
Extracts file extension from filename. 
return extractExtension(strFilename, "xml");
StringextractExtension(String url)
Extract the extension from the given URL. 
int index = url.lastIndexOf('/');
if (index != -1) {
    url = url.substring(index + 1);
index = url.lastIndexOf('.');
if (index == -1) {
    return null;
url = url.substring(index + 1);
int end = url.indexOf('?');
if (end != -1) {
    url = url.substring(0, end);
end = url.indexOf('#');
if (end != -1) {
    url = url.substring(0, end);
return url;
StringextractExtensions(String fileName)
extract Extensions 
int pos = fileName.lastIndexOf(".");
if (pos == -1)
    return "";
return fileName.substring(fileName.lastIndexOf("."));
StringfileExt(String name)
Return filename extension. 
String ext = null;
String fname = pathName(name);
int index = fname.indexOf(".");
if (index > 0)
    ext = fname.substring(index, fname.length());
return ext;
StringfileExt(String url)
file Ext 
String ext = url.substring(url.lastIndexOf("."));
if (ext.contains("?")) {
    ext = ext.substring(0, ext.indexOf("?"));
if (ext.contains("%")) {
    ext = ext.substring(0, ext.indexOf("%"));
return ext;
...
StringfileExtension(CharSequence path)
Given a file name, this method checks to see if path ends with an extension such as ".java", ".yml", etc. 
int index = findExtension(path);
if (index >= 0) {
    return path.subSequence(index, path.length()).toString();
return null;