Doubt in Arrays

[rasu rg]

How the allocation will be done in multi dimensional arrays like 4 dimensional arrays, 3 dimensional arrays, how four dimensional arrays will be related to objects or array in two/three dimensional arrays. Where can i get the detail information about array allocations.

Iam scoring 50%-80% in mock tests, but how will be the questions in real scjp exam, will the questions similar to the ones which we are doing in mock tests.

[Keith Lynn]

Remember that you are declaring arrays of arrays, so something like int[m][n] will allocate m spaces in an array. Each of these spaces will be references to arrays with n elements.

[Naseem Khan]

String [][] str=new String[4][];
str[0]=new String[2];
str[1]=new String[1];

Here is how the allocation happens for a two dimensional array.

        
                          0       1
                       ---------------
                       | null | null |                          
                       --------------- 
                            ^
                            |     -------   
                            |     | null |
                            |     -------
                            |     ^  0
                            |     |
                         ---|-----|---------------------
   str-------------->>>>>|     |    |   null  |  null  |
                         -------------------------------
                            0    1       2         3

Naseem
[ July 03, 2006: Message edited by: Naseem Khan ]

[wise owen]

Arrays