Java Card APIs

• Java Card 2.2.1 (http://java.sun.com/products/javacard/)
  The Java Card API forms the base API and is available on any Java Card.
  Javadocs
   
• Java Card 2.1.1 (legacy)
  The Java Card 2.1.1 API is the predecessor to Java Card 2.2.1 and is included to support legacy cards.
  Javadocs