--- /dev/null
+import "JavaBuiltin" as Java\r
+ \r
+class Num a where\r
+ (+) :: a -> a -> a\r
+ (-) :: a -> a -> a\r
+\r
+instance Num Integer where\r
+ (+) = Java.iadd\r
+ (-) = Java.isub\r
+\r
+(<=) = Java.icmple\r
+\r
+fibonacci x = if x <= (1 :: Integer) \r
+ then 1 :: Integer\r
+ else fibonacci (x - (1 :: Integer)) \r
+ + fibonacci (x - (2 :: Integer))\r
+\r
+main = fibonacci 10\r
+--\r
+89
\ No newline at end of file