Descripción: Java skills Explained simple . JAVA PROGRAMMING FOR BEGINNERS.
//java card /
javacardx.crypto
javacardx.annotations
javacardx.apdu javacardx.biometry
javacardx.biometry1toN
javacardx.external
javacardx.framework.math
javacardx.framework.string
javacardx.framework.tlv
javacardx.util
javacardx.security
At the next reset, the VM starts again and recovers its previous heap from persistent storage.
Virtual Machine Lifecycle and Persistence The Java Card VM and related runtime conditions are unique aspects of the Java Card specica tions. The VM is not executed as a process of a host operating system that can be ended. Rather, it is executed forever and its lifetime is that of the host hardware, which means it will never be terminated and its related applications and objects will not be automatically destroyed. The VM and the created objects are used to represent application information that is persistent and will survive a power loss. It is just stopped at that time; at the next reset, the VM starts again and recovers its previous heap from persistent storage. This design is inherited from the smartcard world where a transaction must survive a power loss, because the power source is external and depends on a card acceptance device (CAD). CAD is used here to refer to both types of card readers: the conventional card acceptance device for contacted I/O interfaces and the proximity coupling device (PCD) for contactless interfaces. Execution The format of Java Card applications is a converted applet (CAP) le, which ensures binary com patibility across Java Card platforms. A CAP le contains an executable binary representation of 84
