Question

Just don’t know why this snippet is not correct.

Calendar now = Calendar.getInstance();
DateFormat formatter = new SimpleDateFormat("yyyy/MM/dd"); 
String nowDate1 = formatter.format(now.getTime());
Date nowDate = formatter.parse(nowDate1);

Answer 1

Based on your comments, your are not including the try / catch sentences:

try {
    Calendar now = Calendar.getInstance();
    DateFormat formatter = new SimpleDateFormat("yyyy/MM/dd"); 
    String nowDate1 = formatter.format(now.getTime());
    Date nowDate = formatter.parse(nowDate1);
}
catch (Exception e) {
    e.printStackTrace();
}

As parse() could throw a ParseException at runtime, the compiler is warning you about it, and that is why you need to consider the possibility of a ParseException.