Java Date Time Format

String str = "12/9/2010 4:39:38 PM";
Formatter formatter = new SimpleDateFormat("M/dd/yyyy H:m:s a");
Date date =(Date)formatter.parse(str);
Formatter formatterOutput = new SimpleDateFormat("MM/dd/yyyy HH:m:ss a");
String s = formatterOutput.format(date);


Format formatter;

// The year
formatter = new SimpleDateFormat("yy");    // 02
formatter = new SimpleDateFormat("yyyy");  // 2002
ime
// The month
formatter = new SimpleDateFormat("M");     // 1
formatter = new SimpleDateFormat("MM");    // 01
formatter = new SimpleDateFormat("MMM");   // Jan
formatter = new SimpleDateFormat("MMMM");  // January

// The day
formatter = new SimpleDateFormat("d");     // 9
formatter = new SimpleDateFormat("dd");    // 09

// The day in week
formatter = new SimpleDateFormat("E");     // Wed
formatter = new SimpleDateFormat("EEEE");  // Wednesday

// Get today's date
Date date = new Date();

// Some examples
formatter = new SimpleDateFormat("MM/dd/yy");
String s = formatter.format(date);
// 01/09/02

formatter = new SimpleDateFormat("dd-MMM-yy");
s = formatter.format(date);
// 29-Jan-02

// Examples with date and time; see also
// Formatting the Time Using a Custom Format
formatter = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss");
s = formatter.format(date);
// 2002.01.29.08.36.33

formatter = new SimpleDateFormat("E, dd MMM yyyy HH:mm:ss Z");
s = formatter.format(date);
// Tue, 09 Jan 2002 22:14:02 -0500