The puzzle
What is the output of the following script:
public class test {
public static void main(String[] args) {
double x = 0.4999999999999999;
double y = 0.49999999999999992;
double z = 0.49999999999999994;
System.out.println(x + " rounded is " + Math.round(x));
System.out.println(y + " rounded is " + Math.round(y));
System.out.println(z + " rounded is " + Math.round(z));
}
}
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Answer
0.4999999999999999 rounded is 0
0.49999999999999994 rounded is 1
0.49999999999999994 rounded is 1
Explanation
It's a bug.
See also: Why does Math.round(0.49999999999999994) return 1