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  Tutorial: Array Review

Subscripts, Declaration, Allocation

Tutorial Details:

Array subscripts start at 0.
Array subscription checks bounds. May throw ArrayIndexOutOfBoundsException.
Array declaration doesn't create an array.
int[] a; // Declares an array reference.
a = new int[200]; // Allocates an array.
Arrays are allocated on the heap, not on the stack.
Copying an array reference doesn't copy the array.
int[] a = int[100];
int[] b;

Multidimensional Arrays
This discussion is about two-dimensional arrays, but there's no limit on the number of dimensions.
There are two kinds of two-dimensional array implementations
Compiler maps two subscripts into one linear space. (C, C++)
Array of arrays (C, C++, Java).
The Array-of-array approach allows ragged arrays.
Initilization is supported with nested braces.


 

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