[OT] RE: Can't generate class file from Interface

[Peter Crowther <Pe...@melandra.com>]

This is not a Tomcat question.  Please find a more appropriate list.

                - Peter

> -----Original Message-----
> From: sam wun [mailto:sw2018@gmx.com]
> Sent: 26 August 2008 13:03
> To: Tomcat Users List
> Subject: Can't generate class file from Interface
>
> Hi,
>
>
>
> In Eclipse 3.4 (not sure about the previous version), I have
> a project, in
> the src, there is a interface file called
> "DatabaseCommand.java". This file
> is an interface file.
>
> It s content is shown below:
>
> package command;
>
> import java.sql.Connection;
> import java.sql.SQLException;
>
> public interface DatabaseCommand {
>     public Object executeDatabaseOperation(Connection conn) throws
> SQLException ;
> }
>
>
>
>
>
> Another file CreateOrder.java *implements* this interface.
>
> Its content shown as below:
>
>
>
> Package command;
>
> import java.sql.Connection;
> import java.sql.SQLException;
> import java.sql.Statement;
> import java.sql.ResultSet;
> import java.util.ArrayList;
> import domain.Customer;
>
> /**
>  * List existing customers in the database
>  */
>
> public class ListCustomers implements DatabaseCommand {
>
>     public Object executeDatabaseOperation(Connection conn) throws
> SQLException {
>         // List customers in the database
>
>         ArrayList<Customer> list = new ArrayList<Customer>();
>         Statement sta = conn.createStatement();
>         ResultSet rs = sta.executeQuery("SELECT ID, FIRST_NAME,
> LAST_NAME, ADDRESS FROM CUSTOMER");
>         while(rs.next()) {
>             Customer cust = new Customer();
>             cust.setId(rs.getInt(1));
>             cust.setFirstName(rs.getString(2));
>             cust.setLastName(rs.getString(3));
>             cust.setAddress(rs.getString(4));
>             list.add(cust);
>         }
>
>         rs.close();
>         sta.close();
>
>         return list;
>     }
> }
>
>
>
> When I press Clt-B to build the project(All),
> DatabaseCommand.java does not
> get compiled, no DatabaseCommand.class generated in the
> build\classes\command\ directory. The syntax highlithed in the
> CreateOrder.java file indicated that DatabaseCommand is an
> unknown type,
> that meant no class found.
>
>
>
> How can I get around this issue? may be I should ask how to
> generate an
> interface dot class file (eg. DatabaseCommand.class in this instance)?
>
>
>
> Thanks
>
> Sam
>
>
>

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