T questions: Write a user registration interface

User class: UserBean   

User Action class interface: UserDao

Interface implementation class: DaoImpl

User test class: UserTest

  
public class UserBean{
private String username;
  private String password;
  public UserBean(String name,String password){
    this.username=username;
    this.password=password;
   }
   public void setName(String name){
   this.username=name;
   }
   public String getName(){
   return this.username;
   }
   public void setPass(String pswd){
   this.password=pswd;
   }
   public String getPass(){
   return this.password;
   }
}

public interface UserDao{

public abstract boolean register(UserBean user);

}

public class DaoImpl implements UserDao{

 ArrayList<UserBean> list=new ArrayList<UserBean>();
  public boolean register(Userbean user){boolean flag=true;
       list.add(user);
       return true;
    }

public  class UserTesr {
   public  static  void main (String args []) { 
    UserDao UD = new new UserDao (); 
    the UserBean User = new new the UserBean ( "both", "123456" );
     IF (ud.register (User)) { 
         the System. Out.println "registered successfully!" ); 
       } 
     the else { 
      System.out.println ( "registration failed!" ); 
     } 
  } 
}