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7.5.31 iastore

Store into int array




iastore = 58 (0x3a)


…, 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 and value must be of type int. The arrayref, index and value are popped from the operand stack. The int value is stored as the component of the array indexed by index.

Runtime Exception

If arrayref is null, iastore throws a NullPointerException.

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


In some circumstances, the iastore 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 iastore instruction will not be available.

javacard/jcvm/7.5.31_iastore.txt · Last modified: 2017/05/13 04:11 (external edit)