Converting Epoch time to date string

You'd create a Date from the long - that's easy:

Date date = new Date(epochTime);

Note that epochTime here ought to be in milliseconds since the epoch - if you've got seconds since the epoch, multiply by 1000.

Then you'd create a SimpleDateFormat specifying the relevant pattern, culture and time zone. For example:

SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy", Locale.US);
format.setTimeZone(...);

Then use that to format the date to a string:

String text = format.format(date);

Look into SimpleDateFormat

SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
sdf.format(new Date(myTimeAsLong));

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