array casting

[savagecabbage]

Hi, guys,
I'm having trouble casting an int array into a double array. This is how I did it:

int[] a = {1, 2, 3, 4, 5};
double[] b = (double[])a;

And it gave out this:

test.java:7: inconvertible types
found   : int[]
required: double[]
                double[] b = (double[])a;
                                       ^
1 error

Can anyone shed some light on this? Thanks.

[Drain]

You'd have to use a loop. You can't cast arrays like that.

[savagecabbage]

That's what I thought. Thanks.

[cjard]

you only use this to convert an array of a parent type to an array of child type..

suppose you stored a String[] into a Vector. when you get it out again, its a Object.. so you cast back to String[]:

String[] ss = (String[])(myVector.elementAt(2));

this is called type conversion..

by attempting int[] to double[] youre trying to perform data conversion, which must be done on an each-array-element level