Java Filesystem

import java.io.File;
import java.io.IOException;
import java.util.*;

public class FileProva {

        public static void lsDir(String path) {
            File dir;
            String[] list = null;
            dir = new File(path);
            list = dir.list();
            Arrays.sort(list);
            for (String s:list)
                System.out.println(s);
        }


    public static void main(String[] args) throws IOException {

        File theDir = new File("/home/piffy2/esperimenti");
        if (!theDir.exists()) theDir.mkdir();
        File f= new File("/home/piffy2/esperimenti/pippo.txt");
        f.setExecutable(true);
        f.setReadOnly();
        System.out.println(f.length());
        //f.delete();
        lsDir("/home/piffy2");
        System.out.println("Separatore percorso: "+File.pathSeparator+"\n Separatore di File\n"+File.separator);
    }

}