listFilesInPath.java

import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;


    public static List<String> fileList(String directory) {
        List<String> fileNames = new ArrayList<>();
        try (DirectoryStream<Path> directoryStream = Files.newDirectoryStream(Paths.get(directory))) {
            for (Path path : directoryStream) {
                fileNames.add(path.toString());
            }
        } catch (IOException ex) {}
        return fileNames;
    }