.atan2()
The Math.atan2()
method returns the counterclockwise angle, in radians, between a (x,y) point and the positive x-axis.
Syntax
Math.atan2(y, x)
Note that the order of arguments is first the Y coordinate, then the X coordinate.
Example
Use Math.atan2()
to return the angle of point (0.0, 1.0)
and the x-axis:
public class Main {public static void main(String[] args) {double x = 0.0;double y = 1.0;System.out.println(Math.atan2(y, x));// Output: 1.5707963267948966}}