byte
or boolean
from arraybaload |
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 int
. 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 an int
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 ArrayIndex-OutOfBounds-Exception
.
Notes
The baload instruction is used to load values from both byte
and boolean
arrays. In Sun's implementation of the Java Virtual Machine, boolean
arrays (arrays of type T_BOOLEAN
; see §3.1 and the description of the newarray instruction) are implemented as arrays of 8-bit values. Other implementations may implement packed boolean
arrays; the baload instruction of such implementations must be used to access those arrays.