FW: [vtkusers] vtkDoubleArray[]...

[Shyam Prakash]

Said,
	If you have not received the reply see the message below. Else
ignore this.

--Shyam

> -----Original Message-----
> From: Shyam Prakash [mailto:ramakrishna.prakash at quest-global.com]
> Sent: Monday, October 20, 2003 5:06 PM
> To: 'Said.'; VTKUserList (vtkusers at www.vtk.org)
> Subject: RE: [vtkusers] vtkDoubleArray[]...
> 
> Said,
> 	In the following line you are just creating an array of length
> NUMBER_OF_ARRAYS.
> 
> solution = new vtkDoubleArray[NUMBER_OF_ARRAYS];
> 
> 	However, the elements at each row of the array is still null.
You
> need to create an object at each row before you access them. Following
is
> the updated code.
> 
> 
> private void initDataArray(int nv){
>     solution = new vtkDoubleArray[NUMBER_OF_ARRAYS];
>     System.out.println(solution.length);
>     int counter = 0;
>     String[] names = new
> String[]{"Ex","Ey","Ez","||E||","Hx","Hy","Hz","||H||"};
>     for(counter = 0; counter < NUMBER_OF_ARRAYS; counter++){
> 
> 	//here you need to create a new object
> 	solution[counter] = new vtkDoubleArray();
> 
> 	//rest of the code is fine
> 
> 
> --Shyam
> 
> 
> -----Original Message-----
> From: vtkusers-admin at vtk.org [mailto:vtkusers-admin at vtk.org] On Behalf
Of
> Said.
> Sent: Monday, October 20, 2003 4:17 PM
> To: vtkusers
> Subject: [vtkusers] vtkDoubleArray[]...
> 
> Hi vtkusers,
> 
> In this method I instanciate an attay of vtkDoubleArray class.
> 
>   System.out.println(solution.length); ==> 8 OK.
> 
> The problem here is, when I try call a method on solution[counter]
> object like this:
> solution[counter].SetNumberOfValues(nv);
> 
> I get a NullPointerException. Does any of you have an idea ?
> 
> Thanks.
> 
> private void initDataArray(int nv){
>     solution = new vtkDoubleArray[NUMBER_OF_ARRAYS];
>     System.out.println(solution.length);
>     int counter = 0;
>     String[] names = new
> String[]{"Ex","Ey","Ez","||E||","Hx","Hy","Hz","||H||"};
>     for(counter = 0; counter < NUMBER_OF_ARRAYS; counter++){
>       solution[counter].SetNumberOfValues(nv);
>       solution[counter].SetName(names[counter]);
>     }
>     for(counter=0; counter < nv;counter++){
>       solution[counter].SetValue(counter,0);
>     }
>   }
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