New Input/Output 2 - Beginning Java 8 Language Features - page 448

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
public class DeleteDirectoryTest {
public static void main(String[] args) {
/* WARNING!!!
Replace YOUR_DIR_PATH_TO_DELETE in the following statement with
the path of the directory whose contents you want to delete.
You will not be able to get the contents of the directory back
after you run this program.
*/
Path dirToDelete = Paths.get("YOUR_DIR_PATH_TO_DELETE");
FileVisitor<Path> visitor = getFileVisitor();
try {
Files.walkFileTree(dirToDelete, visitor);
}
catch (IOException e) {
System.out.println(e.getMessage());
}
}
public static FileVisitor<Path> getFileVisitor() {
// A inner local class that is used as a file visitor to
// delete a directory
class DeleteDirVisitor extends SimpleFileVisitor<Path> {
@Override
public FileVisitResult postVisitDirectory(Path dir,
IOException e) throws IOException {
FileVisitResult result = CONTINUE;
// Now, delete the directory at the end
if (e != null) {
System.out.format("Error deleting %s. %s%n",
dir, e.getMessage());
result = TERMINATE;
}
else {
Files.delete(dir);
System.out.format("Deleted directory %s%n",
dir);
}
return result;
}