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- - Matrices (http://www.programmingforums.org/showthread.php?t=12999)

paulchwd

Apr 15th, 2007 1:28 AM

Matrices

Hi,

i want to get the size of a matrix from a user at the command line and then prompt them to enter the values to be stored in the matrix,

i cant wrap my head around 2d arrays (programming them, can you help me pls.

thnx x10

titaniumdecoy

Apr 15th, 2007 1:54 AM

If you know how to get user input, then creating a 2D array is simple enough:

int[][] matrix = new int[numRows][numCols];

You can access a specific element of the array as matrix[row][col].

If you need more help, your best bet would be to search the web for answers. A Google search for "2d array java" turns up a multitude of resources.

paulchwd

Apr 15th, 2007 12:40 PM

im am using stringtokenizer to tokenize the user input (first row of data), but where do i put the while(st.hasMoreTokens()) loop?, here is my code:

StringTokenizer st = new StringTokenizer(data);

  

      

                     for (int i=0; i<=row-1; i++ )

                     {

                                System.out.println("I= " + i);



                            for(int j=0; j<=col-1; i++)

                            {



                                    System.out.println("J= " + j);

                                  addArray1[i][j]=Integer.parseInt(st.nextToken());

                                                        

                            }

                      

                    }

thnx x 10

titaniumdecoy

Apr 15th, 2007 3:04 PM

Will you please stop rating all your threads 5 stars? The exclamation mark sign isn't necessary either. Your posts will be read.

If you expect the user to enter a specific number of tokens, a for loop would likely be preferable to a while loop.

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