Class java untuk rotasi Gambar

import greenfoot.*;
import java.awt.Color;

public class TransformImage
{
    public GreenfootImage rotate(GreenfootImage image,int degree)
    {
        double angle=1.0*degree*Math.PI/180;
        GreenfootImage imageo=new GreenfootImage(image.getWidth(),image.getHeight());
        for(int i=0;i<image.getWidth();i++){
            for(int j=0;j<image.getHeight();j++){
                Color warna=image.getColorAt(i,j);
                int ia=(int)(1.0*i-0.5*image.getWidth());
                int ja=(int)(1.0*j-0.5*image.getHeight());
                int io=(int)(ia*Math.cos(angle)-ja*Math.sin(angle));
                int jo=(int)(ia*Math.sin(angle)+ja*Math.cos(angle));
                io=(int)(1.0*io+0.5*image.getWidth());
                jo=(int)(1.0*jo+0.5*image.getHeight());
                if(io>=0 && jo>=0 && io<image.getWidth() && jo<image.getHeight()){
                    imageo.setColorAt(io,jo,warna);
                }
            }
        }
        return imageo;
    }
}