Why
int arr[][]=new int[5][];
declaration is perfectly fine but
int arr[][]=new int[][5]
generates compile time error ?
Please do help me. I am not able to understand why is that so?
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1 Answer
int arr[][] (which is more typically written as int[][] arr) is an array, each element of which is in turn a reference to an array.
new int[][5] would mean "create an array of unknown length, each element of which is a reference to an array, each of length 5". Obviously, that doesn't make sense.
On the other hand, new int[5][] means "create a length-5 array, each element of which is a null reference to an array".
answered Jul 13, 2012 at 1:33
Oliver Charlesworth
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