import java.io.File;
public class hehe {
public static void main(String[] args){
File fi = new File("d:/CF");
tree(fi);
}
public static void tree(File f){
File[] gg = f.listFiles();
for(int i = 0;i < gg.length;++ i){
System.out.println(gg[i].getName());
if(gg[i].isDirectory()){
tree(gg[i]);
}
}
}
}