User Input on a 2D Array (Java)

Question

I am trying to implement the knights tour problem on a 3x4 grid display. My grid is displayed as follows:

   A B C D
1: 1 - - -
2: - - - -
3: - - - -

The user starts on A1, which is [0][0] on the 2D array. How would I associate my user input with other positions on the grid. For example, if the user was to type A2 (I'm aware this isn't a valid knight move) - how would I let the program know this is position [0][1] on the array (I think)?

Any help would be much appreciated.

Any idea how I could implement this in code? The letters A B C D are a char called 'file' and my number 1, 2 and 3 are an int called 'rank'. — JB1000
– JB1000, Commented May 3, 2016 at 13:05
you can use if else ,switch case to check a or b or ..etc. you can do it also using character code but if else should be fine.and can you share the codes — Madhawa Priyashantha
– Madhawa Priyashantha, Commented May 3, 2016 at 13:13

Matteo Di Napoli · Accepted Answer · 2016-05-03 13:14:14Z

1

Let's say you have index i, j for 2DArray[i][j]: then you can use i = rank - 1, and j = file - 65 exploiting char autocasting to int and ASCII int values to obtain the correct 2D array position.

answered May 3, 2016 at 13:14

Matteo Di Napoli

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