I'm working on an automation task, where a file gets downloaded and I have to extract path of that downloaded file alongwith name (I know that file will be downloaded in Downloads folder, but I want path for the latest downloaded file only). Ultimately, I want to fetch extension. But I'll be able to fetch extension only when path is available, please help me out with extracting path.

CodePudding user response：

This should do the job:

package foo;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Date;
import java.util.concurrent.TimeUnit;

public class Bar {

    public static File getNewestFileFromDir(File dir) throws IOException {      
        File newestFile = null;
        Date newestCreationDate = null;
        File[] files = dir.listFiles(File::isFile);
        for (File file: files) {
            Path filePath = file.toPath();
            BasicFileAttributes attributes = Files.readAttributes(filePath, BasicFileAttributes.class);
            long milliseconds = attributes.creationTime().to(TimeUnit.MILLISECONDS);
            if ((milliseconds > Long.MIN_VALUE) && (milliseconds < Long.MAX_VALUE)) {
                Date creationDate = new Date(attributes.creationTime().to(TimeUnit.MILLISECONDS));
                if (newestCreationDate != null) {
                    if (creationDate.after(newestCreationDate)) {
                        newestCreationDate = creationDate;
                        newestFile = file;
                    }
                }
            }
        }
        return newestFile;
    }
    
    public static String getFileExtension(File file) {
        String extension = "";
        String fileName = file.getName();
        int i = fileName.lastIndexOf('.');
        if (i > 0) {
            extension = fileName.substring(i   1).toLowerCase();
        }
        return extension;
    }

}