import javax.annotation.processing.SupportedSourceVersion;
import java.io.*;
import java.util.logging.Filter;

public class Main {

    public static void main(String[] args) {
        String filePath = "pat do datoteka";
        File file = new File(filePath);

        File[] files = file.listFiles();
        long max_length = 0;
        File tmp = null;
        for(int i = 0; i < files.length; i++) {
            if(max_length < files[i].length()) {
                max_length = files[i].length();
                tmp = files[i];
            }
        }
        System.out.println(tmp.getName());


    }
}