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File file = new File(folder);

file.delete()

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Path path = Paths.get(folder);

Files.delete(path);

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import java.io.File;

public class DeleteFolderExample {

    /**

     * main

     *

     * @param args

     */

    public static void main(String[] args) {

        File file = new File("D:\testout");

        deleteDir(file);

    }

    /**

     * delete folder

     *

     * @param file

     */

    public static void deleteDir(File file) {

        // neu file la thu muc thi xoa het thu muc con va file cua no

        if (file.isDirectory()) {

            // liet ke tat ca thu muc va file

            String[] files = file.list();

            for (String child : files) {

                File childDir = new File(file, child);

                if (childDir.isDirectory()) {

                    // neu childDir la thu muc thi goi lai phuong thuc deleteDir()

                    deleteDir(childDir);

                } else {

                    // neu childDir la file thi xoa

                    childDir.delete();

                    System.out.println("File bi da bi xoa "

                            + childDir.getAbsolutePath());

                }

            }

            // Check lai va xoa thu muc cha

            if (file.list().length == 0) {

                file.delete();

                System.out.println("File bi da bi xoa " + file.getAbsolutePath());

            }

        } else {

            // neu file la file thi xoa

            file.delete();

            System.out.println("File bi da bi xoa " + file.getAbsolutePath());

        }

    }

}