--- /dev/null
+import "JavaBuiltin" as Java\r
+\r
+infixl 7 (*)\r
+infixl 6 (+)\r
+\r
+class Additive a where \r
+ (+) :: a -> a -> a \r
+\r
+class (Additive a) => Ring a where\r
+ (*) :: a -> a -> a\r
+\r
+instance Additive Double where\r
+ x + y = Java.dadd x y\r
+\r
+instance Ring Double where\r
+ x * y = Java.dmul x y\r
+\r
+instance Additive Integer where\r
+ x + y = Java.iadd x y\r
+\r
+instance Ring Integer where\r
+ x * y = Java.imul x y\r
+\r
+main = (1.0 :: Double)*(2.0 :: Double)+(3.0 :: Double)*(4.0 :: Double)\r
+--\r
+14.0\r
+\r