Two dimensional arrays - HELP!

[ecco]

Hi!I'm ecco, and I'm pretty new at these forums (obviously), and I need some help with one of my Java-programs.

My program is based on commands through user input (1-7), for buying oil-fields (in Utiopia), showing lists, overviews etc (the rest is not really that important). Command 1 asks the user to give the companies name, and what fields he wants to buy, and depending on whether the fields are bought or not already, I want to save this data into 2 different two-dimensional arrays (one for the company-name, one for fields(rows-columns).

Row-input should only be between the numbers 0 and 10, while columns-input need to be between 0 and 15. The program compiles and runs just fine, but my problem lies at my column-input;

Whenever i set the column-number to be 10 or more, i get an ArrayIndexOutOfBoundsExceptionError, and I believe my problem lies in my for-loops, though, I can't seem to find it. I've been trying to get this to work for hours! Here's my code (read between the 'HERE' and 'to HERE'-commentaries, line 75-85, marked in bold):

 
import easyIO.*;
 
class oilAdmin {
 
 
    public static void main(String[] args) {
        System.out.println("*** Utiopias oil-administration ***");
        Oil oil = new Oil();
        oil.commandLoop();
        System.out.println("--- Ending program! ---");
    }
}
 
 
    class Oil {
        In key = new In();
        Out screen = new Out();
 
        // In-objects
        In inName = new In();
        In row = new In();
        In col = new In();
 
        // Two-dimensional arrays
        String [][] owner = new String[10][15];
        int [][] field = new int[10][15];
 
        // Command -> method
        void commandLoop() {
            int command = -1;
 
            while (command != 0) {
 
			String menu = "1. Buy field \n" +
                               "2. List fields \n" +
				                   "3. Overview w/statistics \n" +
       	        	                   "4. Update oil-fields \n" +
							               "5. Find row with MAX oil \n" +
							                   "6. Quit \n";
 
			System.out.println(menu);
 
            System.out.print("Give command: ");
            command = key.inInt();
 
            switch (command) {
                    case 1: buyField(); break;
                    case 2: showList(); break;
                    case 3: showOverview(); break;
                    case 4: updateOil(); break;
                    case 5: maxOil(); break;
                    case 6: exit(); break;
                }
            }
 
        }
 
 
        void buyField() {
 
			Oil oil = new Oil();
 
           // Name of buyer
            System.out.print("Name of buyer: ");
            String name = inName.inWord();
 
            // Fields
            System.out.print("Oil-field (1) required (ROW, 0-10): ");
            int rowNum = row.inInt();
            System.out.print("Oil-field (2) required (COL, 0-15): ");
            int colNum = col.inInt();
 
 
			[B]// HERE
			if ( rowNum <= 10 && rowNum >= 0 && colNum <= 15 && colNum >= 0 && owner[colNum][rowNum] == null && owner[rowNum][colNum] == null) {
				for (int i=0; i<field.length; i++) {
					for (int j=0; j<field[i].length; j++) {
						field[colNum][rowNum] = rowNum;
						field[rowNum][colNum] = colNum;
						owner[rowNum][colNum] = name;
						owner[colNum][rowNum] = name;
					}
				}
			}
			// to HERE.[/B]
 
			else {
				System.out.println("Invalid input. Try again!");
				oil.commandLoop();
			}
 
			System.out.println("Field bought! " + owner[colNum][rowNum] + " now have full rights at: " + field[colNum][rowNum] + "-" + field[rowNum][colNum]);
 
        }
 
        void showList() {
 
        }
 
        void showOverview() {
 
        }
 
        void updateOil() {
 
        }
 
        void maxOil() {
 
        }
 
        void exit() {
            System.exit(1);
        }
 
 
 
    }

I'm open to all suggestions. Thanks in advance
ecco

[Norm]

Your code isn't consistent in its use of indexes:
field[colNum][rowNum] = rowNum; // col then row
field[rowNum][colNum] = colNum; // row then col

Can you explain what these lines of code are supposed to do?

[ecco]

Your code isn't consistent in its use of indexes:
field[colNum][rowNum] = rowNum; // col then row
field[rowNum][colNum] = colNum; // row then col

Can you explain what these lines of code are supposed to do?

Yeah, thing is I want the row-values to be in the first dimension of the array, and the column-values to be in the second. Obviously, this is where my problem is, but writing;

 field[rowNum] = rowNum;

.. inside the first of the two for-loops, gives me a type-error (found:int, required:int[]). I might not have explained it perfectly good enough, so I'll try again with an example;

Let's say our user tells us his company name is JavaOil, and JavaOil wants to buy the oil in fields of 9(rows)-12(columns). This is where that part you're mentioning comes in; i want the value of rowNum to go into the first dimension of the field-array, at the position equalled to rowNum, and the value of colNum to go into the second dimension of the same array, at the position equalled to colNum - from there, I can connect this data to the owner, JavaOil, which should be placed in the owner-array at its places equalled to the values of rows and columns in my field-array.

Hope that made things more clear of what I'm trying to do. Long story short i want the user input of rows and columns to go into the position thats equal to the key in the array(in its correct dimension).

[Norm]

If you are going to use the same indexes in both dimensions of the array, you should define the two dimensions of the array to be the same size:
int [][] field = new int[15][15];

[ecco]

Made it work. Thanks, Norm!