Change date format in a Java string

I've a String representing a
date.

String date_s =
            "2011-01-18
            00:00:00.0";

I'd like
to convert it to a Date and output it in
YYYY-MM-DD
format.

2011-01-18

How
can I achieve this?

/>

Okay, based on the answers I retrieved below, here's
something I've tried:

String
            date_s = " 2011-01-18 00:00:00.0"; 
SimpleDateFormat dt = new
            SimpleDateFormat("yyyyy-mm-dd hh:mm:ss"); 
Date date = dt.parse(date_s);
            
SimpleDateFormat dt1 = new
            SimpleDateFormat("yyyyy-mm-dd");

System.out.println(dt1.format(date));

But
it outputs 02011-00-1 instead of the desired
2011-01-18. What am I doing wrong?