Array Questions

Hi All,
Consider the following code
<code>class Test
{
public static void main(String[] args)
{
int i = 4;
int ia[][][] = new int[i][i = 3][i];
System.out.println( ia.length + ", " + ia[0].length+", "+ ia[0][0].length);
}
}
</code>
the answer is 4,3,3
can somebody explained how the compiler evaluate this result
------------------
coffee drinker

Originally posted by amit mawkin:
Hi All,
Consider the following code
<code>class Test
{
public static void main(String[] args)
{
int i = 4;
int ia[][][] = new int[i][i = 3][i];
System.out.println( ia.length + ", " + ia[0].length+", "+ ia[0][0].length);
}
}
</code>
the answer is 4,3,3
can somebody explained how the compiler evaluate this result

If i understand correctly, its evaluated from left to right
Initial value of i will be 4
and once i becomes 3 subsequent values of i gets changed as well.
In a multi-dimensional matrix,
int [3][] //Second value is not mandatory and the length is 3
Same applies here
int a[4][3][3]//Length is 4
Please correct me if i am wrong
Thankx
Ragu

Hi Ragu,
Thanx for your reply
but still not clear to me
its ok that while saying
<code>
i=4;
int x[][][]=new int[i][i=3][i];
</code>
that third bracket will have a value of 3 fine
but look at its print statement
<code>
System.out.println( ia.length + ", " + ia[0].length+", "+ ia[0][0].length);
</code>
generally speaking the length of an array represents no of elements in it .
so if i say
<code>
int a[][]=new int[4][3];
</code>
it means array will hold 4*3 12 elements
also in java Correct me if I am wrong multidimensional arrays are implemented as arrays of arrays.
so when we say ia.length why we get 4 instead of 4*3*3 But as we are reffering to whole arrays not a a subarray inside it.
I can very well get your point that in a 2 dimensional arrays the second part could be left intentionally blank .
I am weak in multidimensional arrays,so if this sort of question comes in my scjp i am definitely goona have to use hit and try method.

[This message has been edited by amit mawkin (edited November 19, 2001).]

Three-dimensional arrays are treated like 2 dimensional. For example, a three-dimensional array of ints could be created with the declaration statement "int[][][] B = new int[7][5][11];".
It's possible to visualize the value of B as a solid 7-by-5-by-11 block of cells. Each cell holds an int and represents one position in the three-dimensional array. Individual positions in the array can be referred with variable names of the form B[i][j][k].
Ragu

so ragu what are the toatl no ints that can be stored in such an array is it 7*5*11
------------------
coffee drinker