Copy contents of an int array to a double array in Java?

Question

I\'m trying to copy the contents of my int array into an array of type double. Do I have to cast them first?

I successfully copied an array of type int to another a

Answer 1

System.arraycopy() can't copy int[] to double[]

How about using google guava:

int[] a = {23,31,11,9};

//copy int[] to double[]
double[] y=Doubles.toArray(Ints.asList(a));