HELP! * YELLOW=global GREY=local Global HTML version of Foils prepared 1 February 97

Foil 42 Java Language -- More on Arrays

From Jan 22 Delivered Lecture for Course CPS616 -- Java Lecture 1 -- Overview CPS616 spring 1997 -- Jan 22 1997. by Nancy McCracken * See also color IMAGE
Secs 89.2
An array of length 128 is subscripted by integers from 0 to 127.
Subscripts are range checked in runtime and so vec[-1] and vec[128] will generate exceptions.
Array length can be extracted via the length instance variable, e.g.
  • int len = vec.length will assign len = 128.
Arrays can have dynamic sizing (a fixed size determined at runtime)
  • int sizeofarray = 67;
  • int vec[] = new int[sizeofarray];
Multidimensional arrays are arrays of arrays
  • char icon[][] = new char[16][16]
  • These arrays can be "ragged":
    • int graph[][] = new int[2][];
    • graph[0][] = new int[4];
    • graph[1][] = new int[7];


Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

If you have any comments about this server, send e-mail to webmaster@npac.syr.edu.

Page produced by wwwfoil on Sun Feb 16 1997