Searching for file with filename pattern and location as parameters.

FileFinder.java

import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.PathMatcher;
import java.nio.file.Paths;
import java.util.Optional;

public class FileFinder {
    public static void main(String[] args) throws IOException {
        Optional<Path> pathOptional = findFile("hello_*.txt", Paths.get("C:/opt/workspace/files"));
        if (pathOptional.isPresent()) {
            Path path = pathOptional.get();
            System.out.println(path.toFile().getAbsolutePath());
        }
    }

    public static Optional<Path> findFile(String globPattern, Path location) throws IOException {
        PathMatcher pathMatcher = FileSystems.getDefault().getPathMatcher("glob:" + globPattern);
        return Files.walk(location).filter(path -> {
            System.out.println(path.toFile().getAbsolutePath());
            return pathMatcher.matches(path.getFileName());
        }).findFirst();
    }
}