import java.io.*;
import java.lang.reflect.*;

class Serializer {
    static void serialize(Object o, OutputStream s) throws IOException, IllegalAccessException {
	Class<?> cls = o.getClass();
	Field[] fields = cls.getDeclaredFields();
	for (Field field : fields)
	    if (field.getType().equals(Integer.TYPE)) {
		field.setAccessible(true);
		s.write(field.getInt(o));   // field.getInt(o) is o.field, only in the other way around
		                            // that is, o.x and o.y in case of Points
	    }
	s.flush();
    }
    
    public static void main(String[] args) throws IOException, IllegalAccessException {
	OutputStream output = new FileOutputStream("point.data");
	serialize(new Point(69, 0), output);

	Point p = new Point(1,2);
	//p.x;
	output.close();
    }
}