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Hi Edward,
I havent tried but I dont think you will need a package for ur file
IdentityDAO.java.
You can try the following steps.
1>Copy file IdentityDAO.java(without any package) to F:\login\ejb directory.
2>Make sure F:\login\ejb directory is in ur classpath or you can make sure
that the current directory is in the classpath(since u are going to compile
the files from F:\login\ejb directory only)
3> go to directory F:\login\ejb
4> Use command F:\login\ejb>javac -classpath .;f:\j2sdkee1.3.1\lib\j2ee.jar
loginEJB\*.java to compile ur java files
I think it should compile

Thanks and Regards,
Amit



> -----Original Message-----
> From:	Edward [SMTP:zhangsc@n...]
> Sent:	Tuesday, May 28, 2002 6:26 PM
> To:	Enterprise Java Beans
> Subject:	[enterprise_java_beans] Why I must create package?
> Importance:	High
> 
>   I have a question about ejb,I want to call a class named
> 'IdentityDAO.java' from a ejb named 'CheckPasswordEJB.java'.I put my files
> in follow directory:
>   F:\login\ejb\loginEJB\CheckPassword.java
>   F:\login\ejb\loginEJB\CheckPasswordHome.java
>   F:\login\ejb\loginEJB\CheckPasswordEJB.java
>   F:\login\ejb\loginEJB\IdentityDAO.java 
> 
> the file "CheckPasswordEJB.java" likes:
> 
> package loginEJB;
> import javax.ejb.SessionContext;
> public class CheckPasswordEJB implements javax.ejb.SessionBean
> {
>  public void ejbCreate()
>  {  }
>   ...
>   public String logininformation(String username,String password)
>  {
>   boolean valid;
>   IdentityDAO ss=new IdentityDAO();
>   valid=ss.verify(username,password);
>   System.out.println("ID="+username+",Password="+password);
>   System.out.println();
>   System.out.println(valid);
>   return "OK";
>  }
> }
> 
> The file "CheckPassword.java" likes:
> 
> package loginEJB;
> public interface CheckPassword extends javax.ejb.EJBObject
> {
>  String logininformation(String username,String password) 
>    throws java.rmi.RemoteException;
> }
> 
> The file "IdentityDAO.java" likes:
> 
> class IdentityDAO
> {
>   public boolean verify(String userName,String userPassword)
>  {
>     System.out.println("name="+userName+" password="+userPassword);
>     return "ok";
>   }
> }
> 
> Then I compile these files,like follows:
> F:\login\ejb>javac -classpath .;f:\j2sdkee1.3.1\lib\j2ee.jar
> loginEJB\*.java
> 
> It raise many errors:
> 
> .\loginEJB\IdentityDAO.java:13: duplicate class: IdentityDAO
> class IdentityDAO
> ^
> loginEJB\CheckPasswordEJB.java:32: cannot resolve symbol
> symbol  : constructor IdentityDAO  ()
> location: class loginEJB.IdentityDAO
>                 IdentityDAO ss=new IdentityDAO();
>                                ^
> loginEJB\CheckPasswordEJB.java:33: cannot resolve symbol
> symbol  : method verify  (java.lang.String,java.lang.String)
> location: class loginEJB.IdentityDAO
>                 valid=ss.verify(username,password);
>                         ^
> 3 errors
> 
> I don't know why create so many errors,then I add a package in
> IdentityDAO.java,it likes:
> 
> package mypackage;
> class IdentityDAO
> {
>   public boolean verify(String userName,String userPassword)
>  {
>     System.out.println("name="+userName+" password="+userPassword);
>     return "ok";
>   }
> }
> 
> Then I put mypackage into EJB files,like that:
> 
> the file "CheckPasswordEJB.java" likes:
> 
> package loginEJB;
> import mypackage.*;
> ...
> 
> and CheckPassword.java and CheckPasswordHome.java is added this statement
> "import mypackage.*;"
> 
> Then I recompile files,it like follows:
> F:\login\ejb>javac -classpath .;f:\j2sdkee1.3.1\lib\j2ee.jar
> loginEJB\*.java
> 
> compile files successfully. I want to know the reason why the file
> "IdentityDAO.java" must be created a package!The four file in the same
> directory!!! Why?
> Any idea will be appreciated!
> Edward
>