A Java array can hold references to row arrays. For example,
double[][] grid = new double[rows][columns];
grid[2][3] = 4.5;
allocates the outer array and all equal-length rows, with numeric entries initially zero. A ragged alternative is
double[][] grid = new double[rows][];
for (int r = 0; r < rows; r++)
    grid[r] = new double[r + 1];
The second form initially has null row references, so each row must be allocated before access. Rows need not have equal lengths, and a two-dimensional array of objects initially contains null object references rather than constructed cell objects. Java represents a two-dimensional array as an array of arrays.

Ancestors (10)

  1. 9
  2. Paper 5
  3. ia
  4. 2007
  5. Past exam of the mathematics course of the University of Cambridge
  6. Mathematics course of the University of Cambridge
  7. Course of the University of Cambridge
  8. University of Cambridge
  9. List of universities
  10. Home

View article source

Discussion (0) New discussion

There are no discussions about this article yet.

Articles by others on the same topic (0)

There are currently no matching articles.
See all articles in the same topic Create my own version