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Java.lang Class

Q1:

What will be the output of the program? 
public class Example 
{
    public static void main(String [] args) 
    {
        double values[] = {-2.3, -1.0, 0.25, 4};
        int cnt = 0;
        for (int x=0; x < values.length; x++) 
        {
            if (Math.round(values[x] + .5) == Math.ceil(values[x])) 
            {
                ++cnt;
            }
        }
        System.out.println('same results ' + cnt + ' time(s)');
    }
}

A same results 0 time(s)

B same results 2 time(s)

C same results 4 time(s)

D Compilation fails.

ANS:A - same results 0 time(s)

Math.round() adds .5 to the argument then performs a floor(). Since the code adds an additional .5 before round() is called, it's as if we are adding 1 then doing a floor(). The values that start out as integer values will in effect be incremented by 1 on the round() side but not on the ceil() side, and the noninteger values will end up equal.



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