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Excellent!

This is what we've been trying to explain to you: the method matrizAsignaturas() is never called, and it's responsible for populating the array matrizAsignaturas[] with values other...

Please post your code in code tags.

We need to see the driving or testing program - the one with the main() method - to see and explain the errors you're seeing. An alternative would be for you...

I like your answer too. One IS 1D and the other 2D, but it's also added complexity for the same storage capacity and no benefit that I can see. I suggest avoiding unnecessary complexity whenever...

@Syed,

Excellent answer, but my question wasn't clear. In DECLARING an array, what's the difference between:

String[][] colArray = new String[4][1];

and

String[] rowArray = new...

What's the difference between String[4][1] and String[4]?

To Syed's point: Is the method matrizAsignaturas() ever called? That is how the matrix is initialized, replacing the null values with the...