import java.io.*;

    public class Main {

        public static void main(String[] args) {
                File f = new File("/Users/josiftepegjozov/Documents/test");
                File[] files = f.listFiles();
                for(int i = 0; i < files.length; i++) {
                    if(files[i].toString().endsWith("rtf")) {
                        if(files[i].delete()) {
                            System.out.println("sucess");
                        }
                        else {
                            System.out.println("fail");
                        }
                    }
                }
            }

        }

    // rec(folder: test)
    // rec(folder: test2)
    // rec(folder: test3)
    //