Java Utililty Methods File Name Extract

List of utility methods to do File Name Extract

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Description

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

Method

StringextractFileName(String path)
extract File Name 
int index = path.lastIndexOf("\\");
if (index > -1) {
    if (index < path.length() - 1) {
        return path.substring(index + 1);
    } else {
        return "";
index = path.lastIndexOf("/");
if (index > -1) {
    if (index < path.length() - 1) {
        return path.substring(index + 1);
    } else {
        return "";
return path;
StringextractFileName(String path)
Pass in /sub/dir/path.html returns path.html 
if (path == null) {
    return null;
String newpath = path.replace('\\', '/');
int start = newpath.lastIndexOf("/");
if (start == -1) {
    start = 0;
} else {
...
StringextractFileName(String path)
Extracts filename portion out of supplied pathname (leaves last segment only) 
if (path == null || path.isEmpty())
    return path;
int pos = path.lastIndexOf('/');
if (pos < 0)
    pos = path.lastIndexOf('\\');
if (pos >= 0)
    return path.substring(pos + 1);
return path;
...
StringextractFilename(String path)
Extract the filename from a (relative or absolute) path. 
String result = path.substring(path.lastIndexOf('/') + 1);
return result.substring(result.lastIndexOf('\\') + 1);
StringextractFileName(String url)
Extract the file name from the URL removing the scheme, domain, query params and named anchor, if present. 
int index1 = url.indexOf('?');
int index2 = url.indexOf('#');
if (index1 == -1) {
    index1 = url.length() + 1;
if (index2 == -1) {
    index2 = url.length() + 1;
int index = Math.min(index1, index2);
if (index < url.length()) {
    url = url.substring(0, index);
index1 = url.lastIndexOf('/');
index2 = url.lastIndexOf('\\');
index = Math.max(index1, index2);
url = url.substring(index + 1);
return url;
StringextractFileNameFromBAMLocation(String location)
Converts strings like /data/results/DNA1234049.bam or DNA1234049.bam to DNA1234049 
String fileName = "";
location = location.toLowerCase();
String[] split = location.split("/");
for (String s : split) {
    if (s.endsWith(".bam")) {
        fileName = s.replaceAll(".bam$", "");
return fileName;
StringextractFileNameFromContentDisposition(String contentDisposition)
Extract the file name from the content disposition header. 
System.out.println("content disposition = " + contentDisposition);
String[] attributes = contentDisposition.split(";");
for (String a : attributes) {
    if (a.toLowerCase().contains("filename")) {
        try {
            return a.substring(a.indexOf('\"') + 1, a.lastIndexOf('\"'));
        } catch (Exception e) {
            return a.substring(a.indexOf('=') + 1, a.length());
...
StringextractFileNameFromPath(final String filePath, char separatorChar)
extract File Name From Path 
int index = filePath.lastIndexOf(separatorChar);
if (index < 0) {
    return filePath;
return filePath.substring(index + 1);
StringextractFileNameFromPath(final String path)
Returns the file name from the path Never null 
final int lastIndex = path.lastIndexOf('/');
if (lastIndex == -1) {
    throw new IllegalArgumentException("The specified path '" + path + "' doesn't contain '/'");
} else {
    return path.substring(lastIndex + 1, path.length());
StringextractFilenameFromPath(String path)
Returns only file name from path 
String sTmp = path.replaceAll("\\\\", "/");
int lastPos = sTmp.lastIndexOf('/');
if (lastPos >= 0)
    return sTmp.substring(lastPos + 1);
else
    return sTmp;