1D 2D array variables

[James Matthews]

also coming stuck with these. ive ordered your book and shouldnt have any further problems once that's arrived (he wishes!)
what are 1d and 2d array variables?

[Ernest Friedman-Hill]

A one dimensional (1d) array is like a list of items:

int[] list = { 10, 11, 12, 13 };

A two dimensional (2d) array is like a rectangular matrix of items:

int[][] matrix = { 
  {0, 1, 2, 3},
  {4, 5, 6, 7},
  {8, 9, 10, 11}
};

You get can an element of a 1d array with one subscript: list[2] is the int "12" (we count from 0 in Java). But you need two subscripts to get an element of a 2d array: matrix[2][1] is the int "9". 2 is the row number, and 1 is the column number. Make sense?

[James Matthews]

yes both my queries are cleared up, thanks a lot.
hopefully ill start to understand it all better soon