Site Tools


Smart Card Solution

User Manual

JavaCard API Samples

Java Card Specification

Knowledge Sharing


7.5.29 iaload

Load int from array




iaload = 39 (0x27)


…, arrayref, index → …, value.word1, value.word2


The arrayref must be of type reference and must refer to an array whose components are of type int. The index must be of type short. Both arrayref and index are popped from the operand stack. The int value in the component of the array at index is retrieved and pushed onto the top of the operand stack.

Runtime Exceptions

If arrayref is null, iaload throws a NullPointerException.

Otherwise, if index is not within the bounds of the array referenced by arrayref, the iaload instruction throws an ArrayIndexOutOfBoundsException.


In some circumstances, the iaload 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.

If a virtual machine does not support the int data type, the iaload instruction will not be available.

javacard/jcvm/7.5.29_iaload.txt · Last modified: 2017/05/13 04:10 (external edit)