Thread: Need help converting from int to double

I know you have to cast in double but I don't know how to put it I tried everything... so i think, the program sorts numbers from an arraylist and then checks to see if your right in the int[] sorted values

 
public void testSortDecimal() {
 
		int[] unsorted = {1.1, .9, 3.2};
		int[] sorted   =  { .9, 1.1, 3.2};
		IterativeSorter is = new IterativeSorter(unsorted);
		int[] a = is.sort();
		assertArrayEquals(sorted, a);
	}

I would but Im not allowed to change the class for the project so i can't change the array, is there a way I can cast double into the method I tried it this way but got errors..

 
int[] unsorted = {(double)1.1, (double).9,(double) 3.2};

If I have the int array and want to have decimals be seen and come back as a decimal how can I write a method that will notice decimals?

For example, this code takes the numbers that are given, -12,-5,-20,-67 then I put them in order from -67 to -5, then when I test this the program goes through and checks to make sure the sorted values match the sorted values that the program comes up with. If both the computer and my answer match up then i get a green check.

@Test
	public void testSortAllNegative() {
		int[] unsorted = {-12, -5, -20, -67};
		int[] sorted   = {-67, -20, -12, -5};
		IterativeSorter is = new IterativeSorter(unsorted);
		int[] a = is.sort();
		assertArrayEquals(sorted, a);
	}

I need to make a new method that follows this one but I want it to work with decimal numbers, I know that in order to do that I need to change the data type but the arraylist is type int but I can't edit the arraylist class. If