=== 6.1.2.1 Active Contexts in the VM ===

At any point in time, there is only one active context within the VM. This is called the currently active context. This can be either the Java Card RE context or an applet's context. All bytecodes that access objects are checked at runtime against the currently active context in order to determine if the access is allowed. A **java.lang.SecurityException** is thrown when an access is disallowed.