Current timestamp as filename in Java

You can get the current timestamp appended with a file extension in the following way:

String fileName = new Date().getTime() + ".txt";

No need to get too complicated, try this one liner:

String fileName = new SimpleDateFormat("yyyyMMddHHmm'.txt'").format(new Date());

try this one

String fileSuffix = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());