Angle Unit Converter

import java.util.Scanner;
import java.math.*;
import java.lang.*;
import com.sun.javafx.geom.transform.BaseTransform.Degree;
public class AngleUnitConverter {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		System.out.println("enter lenght: ");
		int len = scan.nextInt();
		for (int i = 0; i <= len; i++) {
			String[] arr = scan.nextLine().split(" ");
			double num = Double.parseDouble(arr[0]);
			String measure = arr[1];
			if (measure.equals("deg")) {
				System.out.println(degreeToRadians(num)+ " rad");
			}else if (measure.equals("rad")) {
				System.out.println(radiansToDegree(num)+ " deg");
			}
		}
	}
	private static double degreeToRadians(double degrees) {
		double radians = (degrees * Math.PI) / 180;
		return radians;
	}
	private static double radiansToDegree(double radians) {
		double degree = (radians * 180) / Math.PI;
		return degree;
	}
}