Degree to Radian, and Radian to Degree

static double toDegrees(double angrad): Converts an angle in radians to an angle measured in degrees.
static double toRadians(double angdeg): Converts an angle in degrees to an angle measured in radians.


public class Main {
  public static void main(String[] args) {

    System.out.println(Math.toDegrees(1.2));
    System.out.println(Math.toRadians(-1.2));
  }
}

The output:


68.75493541569878
-0.020943951023931952


public class Main {
  public static void main(String args[]) {
    double theta = 120.0;
    System.out.println(theta + " degrees is " + Math.toRadians(theta) + " radians.");
    theta = 1.312;
    System.out.println(theta + " radians is " + Math.toDegrees(theta) + " degrees.");
  }
}

The output:


120.0 degrees is 2.0943951023931953 radians.
1.312 radians is 75.17206272116401 degrees.