See: http://java.sun.com/j2se/1.4.1/docs/api/java/text/DateFormat.html

Be aware that there is a small error in the API documentation for DateFormat.
The exaple code given:

DateFormat df = DateFormat.getDateInstance();
for (int i = 0; i < a.length; ++i) {
    output.println(df.format(myDate[i]) + "; ");
}
 
Should be:

DateFormat df = DateFormat.getDateInstance();
for (int i = 0; i < myDate.length; ++i) {
    output.println(df.format(myDate[i]) + "; ");
}