widening conversion problem(Ref RHE)

[srinivas D]

Hi,
According to widening conversion rule RHE says that we can convert long to float but not vice versa...
I think widening does not refer to the size of the data type...
as long occupies (64 bits) where as float occuies only 32 bits..
then, what this widening refers to ?

[Jane Griscti]

Hi srinivas D,
When you go from a float to a long you lose precision since a long cannot represent the decimal value of a float. (see JLS § 5.1.2)
You can force a float to a long using an explicit cast

float f = 10.2334
long  l = (long) f          // l = 10

Hope that helps.