Java Utililty Methods File Extension Name Extract

List of utility methods to do File Extension Name Extract

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Description

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

Method

StringextractFileExt(String _sFilePathName)
extract File Ext 
int nPos = _sFilePathName.lastIndexOf('.');
return nPos < 0 ? "" : _sFilePathName.substring(nPos + 1);
StringextractFileExt(String filePath)
Extrait l'extension du nom (ex: .xls) comprise dans un nom de fichier. 
int idx = filePath.lastIndexOf(".");
return (idx > -1) ? filePath.substring(idx) : "";
StringExtractFileExtension(String file_name)
Extracts the file extension 
int pos = file_name.lastIndexOf(FILE_EXTENSION_SEPARATOR);
if (pos != -1)
    return file_name.substring(pos + 1);
else
    return "";
StringextractFileExtension(String filename)
Extracts file extension (leaves last segment only) 
if (filename == null || filename.isEmpty())
    return filename;
int pos = filename.lastIndexOf('.');
if (pos >= 0) {
    return filename.substring(pos + 1);
return null;
StringextractFileExtension(String filename)
extract File Extension 
int lastslash = filename.lastIndexOf("/");
if (lastslash != -1)
    filename = filename.substring(lastslash + 1);
lastslash = filename.lastIndexOf("\\");
if (lastslash != -1)
    filename = filename.substring(lastslash + 1);
int lastdot = filename.lastIndexOf(".");
if (lastdot != -1)
...
StringextractFileExtension(String fileName)
extract File Extension 
if (null == fileName || "".equals(fileName.trim())) {
    throw new IllegalArgumentException("File Name cannot be Null/Empty");
int extensionStartPt = fileName.lastIndexOf(".");
return fileName.substring(extensionStartPt + 1);
StringextractFileExtension(String filename)
extract File Extension 
if (filename.isEmpty())
    return null;
if (filename.contains("/"))
    filename = filename.substring(filename.lastIndexOf("/") + 1);
if (filename.length() < 3 || !filename.contains(".")) {
    return null;
return filename.substring(filename.lastIndexOf('.') + 1);
...
StringextractFileExtension(String filename)
Extracts the file extension of the given file filename or empty string, if no file extension is available. 
final int position = filename.lastIndexOf('.');
if (position > 0) {
    return filename.substring(position + 1);
} else
    return "";
StringextractFileExtension(String fileName)
extract File Extension 
int extensionIndex = fileName.lastIndexOf(FileExtensionSeperator);
if (extensionIndex == -1) {
    return "";
} else {
    return fileName.substring(extensionIndex, fileName.length());
StringextractFileExtension(String filePath)
extract File Extension 
int index = filePath.lastIndexOf(".");
if (index == -1) {
    throw new IllegalArgumentException("no extension for file path..." + filePath);
return filePath.substring(index + 1);