base64 image back to png using java too long constant

I am trying to lea java base64 conversion to image

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import redis.clients.jedis.Jedis;

public class HelloWorld {

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

        byte[] btDataFile = new sun.misc.BASE64Decoder().decodeBuffer("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAn4AAAMUCAYAAAAiyCroAAAMGWlDQ1BJQ0MgUHJvZmlsZQAASImVVwdUU0kXnldSCEkogQhICb0J0qv0XgSkg42QBAglhkBQsSOLCq4FFVEUFV0Rsa0FkLUgo...AAABJRU5ErkJggg==");
        File of = new File("/Users/myfolder/Desktop/yourFile.png");
        FileOutputStream osf = new FileOutputStream(of);
        osf.write(btDataFile);
        osf.flush();



    }
}

Problem is that it too long (which it is :) ) of a constant. Now what can I do to achieve this goal? Thanks