MainActivity.java

// get current date in 03-01-2020 format
        String currentDate = new SimpleDateFormat("dd-MM-yyyy", Locale.getDefault()).format(new Date());

        // get current date in 03-Jan-2020 format
        String currentDate2 = new SimpleDateFormat("dd-MMM-yyyy", Locale.getDefault()).format(new Date());

        // get day name like Mon, Tue, Wed, etc.
        String dayName = new SimpleDateFormat("E", Locale.getDefault()).format(new Date());

        // get time in 12 hours
        String getTime = new SimpleDateFormat("hh:mm:ss a", Locale.getDefault()).format(new Date());

        // get time in 24 hours
        String getTime2 = new SimpleDateFormat("HH:mm:ss", Locale.getDefault()).format(new Date());

        // get both date and time
        String currentDateTime = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss", Locale.getDefault()).format(new Date());