public Packet(int pack_type,String username,String password,String to_email_ids,String subject,String content,String filename,String duration)
    {
        this.packet_type=pack_type;
        this.username=username;
        this.password=password;
        this.to_email_ids=to_email_ids;
        this.subject=subject;
        this.content=content;
        this.filename=filename;
        this.duration=duration;

    }