There is lot of documentation on Java 2 API Javadoc
http://java.sun.com/j2se/1.3/docs/api/java/text/SimpleDateFormat.html
Also, there were so many postings on this topic. Please make sure that you try to do some research before you post something on this site.
SimpleDateFormat sdf = new SimpleDateFormat ("dd/MM/yyyy");
Date resultDate = sdf.parse ("12/2/2000");