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Math.round question

 
Greenhorn
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There is a question in the roundup that asks what you will get from this call:
math.round(-3.22)
The API for Math has two round methods
public static int round(float a) return the nearest int
public static long round(double a)return the nearest long

The answer is the int.
All float literals are doubles. There is no for F suffix to make the double cast down to a float.
What am I forgetting?
 
Sheriff
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A simple test confirms that the expression returns a long. For example, when attempting to compile this code...

...the result is...

But speaking of "loss of precision," Java is case sensitive, so "math" is not the same as "Math." Are you certain this is what the roundup question is asking? Or is there more context to the question?

For example, is this the one...?

(#147) What is the result of the following code
System.out.println( Math.round(-3.22) );

-3.0
-4
-3
-4.0


[ September 04, 2007: Message edited by: marc weber ]
 
Zhia-zhia Xiu Bai
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Yes I meant Math
 
Zhia-zhia Xiu Bai
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thanks I see it is with a println now
 
marc weber
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But is there more context to the question?

Note that the roundup question I posted is not asking whether an int or a long will be returned. Both an int and a long will print the same, as -3.
 
marc weber
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Originally posted by Zhia-zhia Xiu Bai:
thanks I see it is with a println now


Cool.
 
Zhia-zhia Xiu Bai
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Sorry to confuse the issue. It does return a long. I thought it asked for more information than it did.
 
author
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remember also that this topic is on the 1.4 exam, but it's NOT on the 5.0 exam
 
Greenhorn
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Why output is:


it is different?
 
Ranch Hand
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class Math is not on the 5.0 exam as far as I know.

Bu.
 
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