Java atan2 () method

Java Number classes

atan2 () method is used to rectangular coordinates (x, y) to polar (r, theta), returns the resulting angle theta. The method by calculating y / x arctangent calculating the phase angle theta, range from -pi to pi.

grammar

double atan2(double y, double x)

parameter

• y - the ordinate.

• x - abscissa.

return value

Corresponding to the midpoint of the polar coordinates (r, theta) with the Cartesian coordinates of the midpoint of the component theta (x, y).

Examples

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 the above program, the output is:

0.982793723247329

Java Number classes