How to compare two double values in Java?

Question

A simple comparison of two double values in Java creates some problems. Let\'s consider the following simple code snippet in Java.

package doublecomparision;         


        

Answer 1

Basically you shouldn't do exact comparisons, you should do something like this:

double a = 1.000001;
double b = 0.000001;
double c = a-b;
if (Math.abs(c-1.0) <= 0.000001) {...}