Java Image rotation program

import org.imgscalr.Scalr;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Scanner;

public class Main {

    private static String DEFAULT_IMAGE_PATH = "images/java.jpg";
    private static String DEFAULT_IMAGE_TYPE = "jpg";

    public static void main(String[] args) throws IOException {

        BufferedImage bi = null;
        BufferedImage manipulatedBi = null;

        try {
            bi = ImageIO.read(new File(DEFAULT_IMAGE_PATH));
        } catch (IOException e) {
            System.out.println(e.toString());
        }

        boolean rotateCommandIsProper = false;

        Scanner sc = new Scanner(System.in);
        String rotateCommand = sc.nextLine();

        while (!rotateCommandIsProper) {
            switch (rotateCommand) {
                case "90":
                    rotateCommandIsProper = true;
                    manipulatedBi = org.imgscalr.Scalr.rotate(bi, Scalr.Rotation.CW_90);
                    break;
                case "180":
                    rotateCommandIsProper = true;
                    manipulatedBi = org.imgscalr.Scalr.rotate(bi, Scalr.Rotation.CW_180);
                    break;
                case "270":
                    rotateCommandIsProper = true;
                    manipulatedBi = org.imgscalr.Scalr.rotate(bi, Scalr.Rotation.CW_270);
                    break;
                default:
                    rotateCommandIsProper = false;
                    System.out.println("Command not understood");
                    rotateCommand = sc.nextLine();
            }
        }

        if(manipulatedBi != null){
            ImageIO.write(manipulatedBi, DEFAULT_IMAGE_TYPE, new File(DEFAULT_IMAGE_PATH));
        }
    }
}