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7.5.12 baload

Load byte or boolean from array




baload = 37 (0x25)


…, arrayref, index → …, value


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.


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.

javacard/jcvm/7.5.12_baload.txt · Last modified: 2017/05/13 04:08 (external edit)