Java arrays and dimensions

pycoucou · 04-07-2004, 09:56 AM

I am confused...

We can get the length of an array thanks to myArray.length. I discovered that per chance. Unfortunately, if I want to use a 2D array, I can't use this trick... Except if someone can explain me I can see if other properties of array exist...

Thanks very much.

Pierre-Yves

Looking_Lost · 04-07-2004, 11:37 AM

Multidimensional arrays are actually arrays of arrays, so you can do

myArray.length for the "width" of the array

myArray[0].length
myArray[1].length

and so on for the individual depth of each array in the array, which don't have to be the same size if you don't want them to be

pycoucou · 04-07-2004, 11:47 AM

Thanks... I am un-confused ;-)

int myArrray = {{1,2,3},{4,5,6}};
myArray.length returns 2
but myArray[0].length would return 3...

I should have written it down first !

Cheers.
Pierre-Yves

Mega Man X · 04-07-2004, 11:57 AM

That's correct:

Code:

int myArray = { { FIRST ELEMENT HAS INDEX 0 }, { SECOND ELEMENT HAS INDEX 1}}

so myArray[0].length returns 3, because you have three elements in the index [0]. I guess...

pycoucou · 04-07-2004, 12:06 PM

Quote:

Originally posted by Megaman X
so myArray[0].length returns 3, because you have three elements in the index [0]. I guess...

Cf my example... :

Mega Man X · 04-07-2004, 01:59 PM

I'm so dumb... you've already understood it when I posted :S Sorry