CHAPTER 10: Arrays

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10.4 Array Access

A component of an array is accessed by an array access expression (S15.12) that consists of an expression whose value is an array reference followed by an indexing expression enclosed by [ and ] , as in A[i] . All arrays are 0 -origin. An array with length n can be indexed by the integers 0 to n-1 .

Arrays must be indexed by int values; short , byte , or char values may also be used as index values because they are subjected to unary numeric promotion (S5.6.1) and become int values. An attempt to access an array component with a long index value results in a compile-time error.

All array accesses are checked at run time; an attempt to use an index that is less than zero or greater than or equal to the length of the array causes an IndexOutOfBoundsException to be thrown.