Method visitFile

mother.java:34–38

(Path file, BasicFileAttributes attrs)

        try {
            Files.walkFileTree(Paths.get(goal), new SimpleFileVisitor<>() {
                @Override
                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                    Files.delete(file);
                    return FileVisitResult.CONTINUE;
                }

                @Override
                public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {