import java.io.*;
import java.net.URLEncoder;
import java.net.URLDecoder;
import  java.nio.charset.Charset;

public class URLencode_object {
    public static void main(String[] args){
        try {
            student jones=new student("jones","senior",90);
            System.out.println("      ///An instance .toString()");
            System.out.println(jones.toString());
            System.out.println("The length: "+jones.toString().length());
            byte [] theobjectbytes  = makeByteArray(jones);
            System.out.println("The length of the object byte array: "+theobjectbytes.length);

            System.out.println("\n      ///The object 'Hexified'");
            String thehexversion=Byte2String(theobjectbytes);
            System.out.println(thehexversion);
            System.out.println("The length: "+thehexversion.length());

            System.out.println("\n      ///The  'Hexified' URLencoded");
            String hexencoded=URLEncoder.encode(thehexversion,"UTF-8");
            System.out.println(hexencoded);
            System.out.println("      The length of the encoded string: "+hexencoded.length());
            System.out.println("\n      ///Finally URLencode the object bytes");
            String encoded=URLEncoder.encode(new String(theobjectbytes),"UTF-8");
            System.out.println(encoded);
            System.out.println("      The length of the encoded string: "+encoded.length());

            System.out.println("\n      ///the name");
            String decoded=URLDecoder.decode(encoded,"UTF-8");
            theobjectbytes=decoded.getBytes();
            student ob=get_student(theobjectbytes);
            System.out.println(ob.name);
        } catch (Exception ioe) {
            ioe.printStackTrace();
        }
    }
    public static byte[] makeByteArray(student mystudent){
        ByteArrayOutputStream baos =null;
        try {
            baos = new ByteArrayOutputStream();
            ObjectOutputStream oos = new ObjectOutputStream(baos);
            oos.writeObject(mystudent);
        } catch (Exception e) {
            System.out.println(e);
        }
        return baos.toByteArray();
    }
    public static student get_student(byte [] theobjectbytes){
        try {
            ByteArrayInputStream bais = new ByteArrayInputStream(theobjectbytes);
            ObjectInputStream ois = new ObjectInputStream(bais);
            return(student)ois.readObject();
        } catch (Exception e) {
            System.out.println(e);
        }
        return new student("noname","noclass",0);
    }
    public static String Byte2String(byte[] barray){
        StringBuilder result = new StringBuilder();
        for (byte b : barray)
            result.append(String.format("%02X", b));  
        return result.toString();
    }

}