Array

[Kiran Chand Panga]

public class test
{
public static void main(String[] agrs)
{
int [][] a1 = { { 1,2,3},{4,5,6},{7,8,9}};
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
System.out.println(a1[j][i]);
}
}
}
}

Ans: at run time the values for a1 are
00 -------- 1
01 ---------2
02---------3
Like this we have to get the answer. But output for this question coming as 147258369
Can any one say why this is happening?

[Ritesh Srivastava]

The result u r expecting will be printed when u use a1[i][j] instead of a1[j][i]

[Christophe Verré]

You are using a1[j][i] and incrementing j in the inner loop

So :
a1[0][0] = 1
a1[1][0] = 4
a1[2][0] = 7

[Kiran Chand Panga]

I can agree for given answers but While creating the Array I didn�t mention any reference names like i or j. so why complier is assuming like first reference is �i� and second reference is �j� ?

[Peter Petrov]

The compiler is not assuming this
The interpreter is assuming this because this
is what you tell him to assume.

Think a bit about it.

With the code you show you are actually going through the table
[1,2,3]
[4,5,6]
[7,8,9]
in the order 1->4->7->2->5->8->3->6->9
while you want to go that way:
1->2->3->4->5->6->7->8->9

Hope this helps.
[ February 15, 2006: Message edited by: Peter Petrov ]

[Valentin Jacquemin]

Summary of two dimensions arrays:
[array][cells]