Standard way to normalize an angle to +/- π radians in Java

Question

Is there a library function or a well-known quick efficient way in Java to normalize an angle to +/- π — e.g. when adding two angles?

What I\'ve got now (based on th

Answer 1

There is only one 100% foolproof way:

public static double normalizeAngle(double angle) {
    return Math.atan2(Math.sin(angle), Math.cos(angle));
}   

Everything else is people trying to be too smart and failing.