aaload : retrieve object reference from array : index : visitInsn()

Description

Retrieves an object reference from an array of objects and places it on the stack. arrayref is a reference to an array of objects. index is an int. The arrayref and index are removed from the stack, and the object reference at the given index in the array is pushed onto the stack.

Exceptions

NullPointerException - arrayref is null

ArrayIndexOutOfBoundsException - index is < 0 or >= arrayref.length

Example

; This is like the Java code:
;     Object x = arr[0];
; where x is local variable 2 and arr is an array of objects in local variable 1
aload_1       ; load local variable 1 onto the stack
iconst_0      ; push the integer 0 onto the stack
aaload        ; retrieve the entry
astore_2      ; store the entry in local variable 2

Notes

Array indices start at 0 (the first entry in the array is at index 0).

See also

iaload faload daload laload baload caload saload iastore lastore fastore dastore aastore bastore castore sastore

Stack

Before	After
index	value
arrayref	...
...	...

Bytecode

Type	Description
u1	aaload opcode = 0x32 (50)