Problem casting a BigDecimal from a Long

[Bill Clar]

Hello,

I'm getting an error: BigDecimal incompatible with java.lang.Long, when I try to run the following code:

Long value = ((BigDecimal) map.get("BUS_FN_ID")).longValue();	

Can a BigDecimal be cast to a Long in Java 7? Will it throw an error in Java 6?

FYI, this is legacy code.

[Bear Bibeault]

No, a Long and BigDecimal do not share any kind of "is a" relationship; so cannot be casted. Look at the JavaDoc for BigDecimal to see the proper path to take.

[Bear Bibeault]

P.S. What does getValue() return? Why convert it to long before trying to convert it to BigDecimal?

[Bill Clar]

It's legacy code and it runs under my workspace but not my coworkers.

getValue() returns an Object.

It's legacy code. I don't know their intentions.

[Bear Bibeault]

Bill Clar wrote:getValue() returns an Object.

But what is it really returning? Obviously it cannot be an instance of Object.

[Ivan Jozsef Balazs]

Bear Bibeault wrote:

Bill Clar wrote:getValue() returns an Object.

But what is it really returning? Obviously it cannot be an instance of Object.

Well, Object is a non-abstract class with a public constructor - it can instantiated ;-)

Anyway, Number could be a common denominator.

 ((Number ) map.get("BUS_FN_ID")).longValue();