Java: how to read matrices with unknown size

Asked Sep 25 '13 at 18:53

Active Sep 25 '13 at 18:53

Viewed 178 times

I need to store the matrix into a[][] from standard input. (System.in)

How do I initialize a if the size is unknown

Please help, thanks

asked Sep 25 '13 at 18:53

user2735868

2

You can't. Use an `ArrayList` or `LinkedList`. Otherwise you will need to grow the array each time you need more space. – Sotirios Delimanolis Sep 25 '13 at 18:54
In addition to Sotirios suggestion: use `ArrayList`s or `LinkedList`s to receive the user input and, then, after everything was received, you will be able to instantiate the multidimensional array you want (a[][]), as you'll have its sizes. – fegemo Sep 25 '13 at 19:14

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