Smart Card Solution
User Manual
- R502 Manual
JavaCard API Samples
- Algorithm
Java Card Specification
Knowledge Sharing
Smart Card Solution
User Manual
JavaCard API Samples
Java Card Specification
Knowledge Sharing
Load byte or boolean from array
Format
baload
Forms
baload = 37 (0x25)
Stack
…, arrayref, index → …, value
Description
The arrayref must be of type reference and must refer to an array whose components are of type byte or of type boolean. The index must be of type short. Both arrayref and index are popped from the operand stack. The byte value in the component of the array at index is retrieved, sign-extended to a short value, and pushed onto the top of the operand stack.
Runtime Exceptions
If arrayref is null, baload throws a NullPointerException.
Otherwise, if index is not within the bounds of the array referenced by arrayref, the baload instruction throws an ArrayIndexOutOfBoundsException.
Notes
In some circumstances, the baload instruction may throw a SecurityException if the current context ( Section 3.4, Contexts) is not the owning context ( Section 3.4, Contexts) of the array referenced by arrayref. The exact circumstances when the exception will be thrown are specified in Chapter 6 of the Runtime Environment Specification, Java Card Platform, Version 2.2.2.