import java.io.*;

public class Test
{   public static void main (String args[])
    {   // get the file.txt file
        File file=new File("file.txt");
        if (file.exists() && !file.isDirectory())
        {   System.out.println("Datei "+file.getName()+" gefunden");
            System.out.println("Voller Name: "+file.getAbsolutePath());
        }
        
        // get all text files
        File dir=new File(".");
        String[] list=dir.list();
        for (int i=0; i<list.length; i++)
            if (list[i].endsWith(".txt"))
            {   long length=new File(dir,list[i]).length(); // get length
                System.out.println(list[i]+" ["+length+"]");
            }
        
    }
}