Java - get the newest file in a directory?

Question

The following code returns the last modified file or folder:

public static File getLastModified(String directoryFilePath)
{
    File directory = new File(directoryFilePath);
    File[] files = directory.listFiles(File::isFile);
    long lastModifiedTime = Long.MIN_VALUE;
    File chosenFile = null;

    if (files != null)
    {
        for (File file : files)
        {
            if (file.lastModified() > lastModifiedTime)
            {
                chosenFile = file;
                lastModifiedTime = file.lastModified();
            }
        }
    }

    return chosenFile;
}

Note that it required Java 8 or newer due to the lambda expression.

In Java 8:

Path dir = Paths.get("./path/somewhere");  // specify your directory

Optional<Path> lastFilePath = Files.list(dir)    // here we get the stream with full directory listing
    .filter(f -> !Files.isDirectory(f))  // exclude subdirectories from listing
    .max(Comparator.comparingLong(f -> f.toFile().lastModified()));  // finally get the last file using simple comparator by lastModified field

if ( lastFilePath.isPresent() ) // your folder may be empty
{
    // do your code here, lastFilePath contains all you need
}     

This works perfectly fine for me:

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.comparator.LastModifiedFileComparator;
import org.apache.commons.io.filefilter.WildcardFileFilter;

...

/* Get the newest file for a specific extension */
public File getTheNewestFile(String filePath, String ext) {
    File theNewestFile = null;
    File dir = new File(filePath);
    FileFilter fileFilter = new WildcardFileFilter("*." + ext);
    File[] files = dir.listFiles(fileFilter);

    if (files.length > 0) {
        /** The newest file comes first **/
        Arrays.sort(files, LastModifiedFileComparator.LASTMODIFIED_REVERSE);
        theNewestFile = files[0];
    }

    return theNewestFile;
}

private File getLatestFilefromDir(String dirPath){
    File dir = new File(dirPath);
    File[] files = dir.listFiles();
    if (files == null || files.length == 0) {
        return null;
    }

    File lastModifiedFile = files[0];
    for (int i = 1; i < files.length; i++) {
       if (lastModifiedFile.lastModified() < files[i].lastModified()) {
           lastModifiedFile = files[i];
       }
    }
    return lastModifiedFile;
}