Java atan2() Method |

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Java atan2() Method

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The atan2() method is used to convert rectangular coordinates (x, y) to polar coordinates (r, theta) and returns the resulting angle theta. This method calculates the phase angle theta by computing the arctangent of y/x, with a range from -pi to pi.

Syntax

double atan2(double y, double x)

Parameters

y -- The ordinate (y-coordinate).
x -- The abscissa (x-coordinate).

Return Value

The theta component of the point (r, theta) in polar coordinates that corresponds to the point (x, y) in Cartesian coordinates.

Example

public class Test{
    public static void main(String args[]){
        double x = 45.0;
        double y = 30.0;
        System.out.println(Math.atan2(x, y));
    }
}

Compile and run the above program, the output result is: