import java.util.*;
class SimpleEmail {
 
  private String sender;
  private String sendermail;
  private String recipient;
  private String recipientmail;
  
  private String subject;
  private String content;
  
  private String messageID; // unique id for email
  private String returnPath; // a return Email if fails
  private String org; //company name
  private String mime; //version if encoded
  private String mailer; //name of mail client used
  private String contentType; //text/plain charset= US-ascii
  
  private Date dateOfEmail;
  
  public SimpleEmail(String s,String sm, String r,String rm,String 
mi,String rp,String o, String mm, String ml, String ct,String t, 
String c, Date d) {
  
     sender = s;
     sendermail = sm;
     recipient = r;
     recipientmail = rm;
     
     messageID = mi;
     returnPath = rp;
     org = o;
     mime = mm;
     mailer = ml;
     contentType = ct;
     
     
     subject = t;
     content= c;
     
     dateOfEmail = d;
  }
 
  public void setSender(String s) {
   sender = s;
   if ( sender == " ")
   sender = "unknown";
  }
  public String getSender() {
    return sender;
  }
  
  
  
  public void setSenderMail(String sm) {
   sendermail = sm;
   
   isAddressValid(sendermail);
   
   
   
   if ( sendermail == " ")
   sendermail = "unknown";
  }
  public String getSenderMail() {
    return sendermail;
  }
  
  
 
  public void setRecipient(String r) {
    recipient = r;
    if ( recipient == " ")
   recipient = "unknown";
  }
  public String getRecipient() {
    return recipient;
  }
 
  
  
  public void setRecipientMail(String rm) {
    recipientmail = rm;
    if ( recipient == " ")
   recipientmail = "unknown";
  }
  public String getRecipientMail() {
    return recipientmail;
  }
  
  
 
  public void setMessageId(String mi) {
    messageID = mi;
    if ( messageID == " ")
   messageID = "unknown";
  }
  public String getMessageId() {
    return messageID;
  }
 
 
 
 
  public void setReturnPath(String rp) {
    returnPath = rp;
    if ( returnPath == " ")
   returnPath = "unknown";
  }
  public String getReturnPath() {
    return returnPath;
  }
 
 
 
  public void setOrg(String o) {
    org = o;
    if ( org == " ")
   org = "unknown";
  }
  public String getOrg() {
    return org;
  }
  
  
  
  public void setMime(String mm) {
    mime = mm;
    if ( mime == " ")
   mime = "unknown";
  }
  public String getMime() {
    return mime;
  }
  
  
  
  public void setMailer(String ml) {
    mailer = ml;
    if ( mailer == " ")
   mailer = "unknown";
  }
  public String getMailer() {
    return mailer;
  }
  
  
  
  public void setcontentType(String ct) {
    contentType = ct;
    if ( contentType == " ")
   contentType = "unknown";
  }
  public String getcontentType() {
    return contentType;
  }
 
 
 
  public void setSubject(String t) {
   subject = t;
   if ( subject == " ")
   subject = "unknown";
   
  }
  public String getSubject() {
    return subject;
  }
 
   public void setContent(String c) {
   content = c;
   if ( content == " ")
   content = "unknown";
  }
  public String getContent() {
    return content;
  }
 
  public void setDate(Date d) {
    dateOfEmail = d;
  }
  public Date getDate() {
    return dateOfEmail;
  }
 
 
 
boolean isAddressValid(String address){
  int opPos=address.indexOf("@");
  if(opPos==-1){//no @
        return(false);
}
  if(address.indexOf("@",opPos)!=-1){//more then one @
        return(false);
}
 
  if(address.indexOf(".")<opPos){//checks that there are no 
dots //before the @
        return(false);
}
  if(address.indexOf(".",opPos)==-1){//checks that there is at least 
one dot after the @
        return(false);
}
  if(address.charAt(address.length()-1)=='.'
  ||address.charAt(addres.length()-2)=='.'){
 
        
        return(false);
}
 
//Here you need to check that all the characters  are letters or 
numbers or @ or dots.
//again return false if the flag raises up.
 
return(true);//if none of the flags rose up it means that the email 
is valid 
 
 
 
 
}
 
 
 
import java.util.*;
public class SimpleEmailTest
{
  
  
  public static final String notKnown = "Unknown";
  public static void main( String[] args )
  {
    SimpleEmail email; // email object to test.
    String whoFromName; // sender
    String fromMail;// sender email address
    String whoToName; // recipient
    String toMail;// recipients email address
    String messageID; // unique id for email
    String returnPath; // a return Email if fails
    String org; //company name
    String mime; //version if encoded
    String mailer; //name of mail client used
    String contentType; //text/plain charset= US-ascii
    String subject; // subject matter
    String content; // text content of email
    
    Date recieved = new Date();
 
    email = new SimpleEmail( notKnown, notKnown, notKnown, notKnown, 
notKnown, notKnown, notKnown, notKnown, notKnown, notKnown, 
notKnown, notKnown, recieved );
 
    
 
 
                        email.setSender( "Suresh" );
                        email.setSenderMail
("SureshDutt@hotmail.com");
                        
                        email.setRecipient( "Sheena Receiver" );
                        email.setRecipientMail
("SheenaReciever@hotmail.com");
                        
                        email.setMessageId("12212.4224.3443.3");
                        email.setReturnPath("admin@hotmail.com");
                        email.setOrg("Dutt Independant Traders
(DITS)");
                        email.setMime("Verseion 1");
                        email.setMailer("outlook express");
                        email.setcontentType("text charset= US-
ASCII");
                        
                        
                        email.setSubject( "How are you today?" );
                        email.setContent( "I just wrote an email 
class!" );
 
                        System.out.println( "SimpleEmail: " +
                                            "\n         From: " + 
email.getSender() + email.getSenderMail() +
                                            "\n           To: " + 
email.getRecipient() + email.getRecipientMail() +
                                            "\n      Subject: " + 
email.getSubject() +
                                            "\n   Message ID: " + 
email.getMessageId() +
                                            "\n  Return Path: " + 
email.getReturnPath() +
                                            "\n Organisation:  " + 
email.getOrg() +
                                            "\n         MIME: " + 
email.getMime() +
                                            "\n       Mailer: " + 
email.getMailer() +
                                            "\n Content Type: " + 
email.getcontentType() +
                                            "\n         Date: " +
                                            email.getDate().toString
() +
                                            "\n      Message: " + 
email.getContent() + "\n");
 
 
 
                                          }
                                        }