public class EmailMessage
{
private String from;
private LinkedList <String> to;
private String subject;
private String content;
private String mimeType;

public EmailMessage(private String from_,
    private LinkedList <String>to_,
    private String subject_,
    private String content_,
    private String mimeType_)

    {
    this.from=from_;
    this.to=to_;
    this.subject=subject_;
    this.content=content_;
    this.miniType=miniType_;
    }
public Builder addFrom(String from_) {
            this.from = from_;
            return this;
        }

public Builder to(LinkedList<String> to_) {
            this.to = to_;
            return this;
        }

public Builder addSubject(String subject_) {
            this.subject = subject_;
            return this;
        }

public Builder addcontent(String content_) {
            this.content = content_;
            return this;
        }

public static Builder builder()
    {
    return new EmailMessage.Builder();
    }
 }
}