This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
The Java type "float" is also called "single-precision floating point." The Java "double" is the double-precision version you're looking for. Now, in your case, you've got an array of "int". You want an array of "double" instead -- is that all?