Using Calendar class and time stamp

Question

I am trying to generate a timestamp for posted messages using the following code:
Calendar cal = Calendar.getInstance();
int m = cal.get(Calendar.MONTH);
String dd = new String().valueOf(cal.get(Calendar.DAY_OF_MONTH));
String yy = new String().valueOf(cal.get(Calendar.YEAR));
String hh = new String().valueOf(cal.get(Calendar.HOUR));
String min = new String().valueOf(cal.get(Calendar.MINUTE));
String sec = new String().valueOf(cal.get(Calendar.SECOND));
String time = hh+":"+min+":"+sec;
However, it seem that when there's a time such as 12:02:08, the actual variable time is as follows: 12:2:8 because the leading zeros are removed? I wouldn't think using it as a String would cause that but I suppose it could be my data types. OR is there an easy way to correct this?
thanks in advance,
Chuck

Answer 1

You could try:
String hh = (cal.get(Calendar.HOUR) < 10) ? "0" + new String().valueOf(cal.get(Calendar.HOUR)) : new String().valueOf(cal.get(Calendar.HOUR));
As Dr Clap already said, you should probably use SimpleDateFormat. I'm sure you can use it to generate whatever formats you need for your unique filenames.