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No, Sir. Course is defined in another package. Should I import it? But
actually, the Course is also an interface that needs to be implemented. I
mean if now I have tow interface as follows,

(1)
---------------------------------------------------------
package registration.interfacepkg;

public interface Course_Prototype
{
	public void setID(int id);
	public int getID();
	public void setName(String name);
	public String getName();
	public void setStartDate(Date startdate);
	public Date getStartDate();
	public void addStudent(Student student);
	public List getRoster();
	public void assignInstructor(Instructor instructor);
	public Instructor getInstructor();
}

(2)
----------------------------------------------------------
package registration.interfacepkg;

import java.util.*;

public interface Student_Prototype
{
	public void setID(int id);
	public int getID();
	public void setName(String name);
	public String getName();
	public void addCourse(Course course);
	public List getSchedule();
}


Course_Prototype and Student_Prototype are interfaces that needs to be
implemented. And I implement them in another package registration.core. They
are named as Course and Student. Now you can see Course and Student are both
needed in the interfaces. So I can't figure out how to resolve the conflict.

Thanks,
Bing



-----Original Message-----
From: Karthik,Gurumurthy [mailto:Karthikg at anz.com]
Sent: Monday, September 04, 2000 11:36 AM
To: 'bing.li at asu.edu'
Subject: RE: [java_help] I can't understand Interface


hi,
are u sure that the class Course defined in the same package as the one
indicated?

rgds
karthik

 > -----Original Message-----
 > From:	Li Bing [SMTP:bing.li at asu.edu]
 > Sent:	Monday, September 04, 2000 11:59 PM
 > To:	damir.arh at telesat.si
 > Cc:	Javamug; Advanced-Java; Java_Help at Egroups. Com; JavaLearners
 > Subject:	FW: [java_help] I can't understand Interface
 >
 > -------------------------- eGroups Sponsor -------------------------~-~>
 > The Five Secrets Of A Successful Product Launch
 > FREE right now at:
 > http://click.egroups.com/1/8592/1/_/498102/_/968092124/
 > ---------------------------------------------------------------------_->
 >
 > Dear Sir,
 >
 > Now I have another question about the interface. If I need to use an 
class
 > that is defined by me in an interface, there is an error because the 
class
 > name can't be resolved.
 >
 > For example, in the following interface,
 >
 > package registration.interfacepkg;
 >
 > public interface Student_Prototype
 > {
 > 	public void setID(int id);
 > 	public int getID();
 > 	public void setName(String name);
 > 	public String getName();
 > 	public void addCourse(Course course);
 > 	public List getSchedule();
 > }
 >
 > The class, Course, is defined by me. But it can't be resolved by the
 > javac.
 >
 > Thanks,
 > Bing
 >
 > -----Original Message-----
 > From: Damir Arh [mailto:damir.arh at telesat.si]
 > Sent: Saturday, September 02, 2000 11:36 PM
 > To: java_help at egroups.com
 > Subject: Re: [java_help] I can't understand Interface
 >
 >
 >
 > Hello!
 >
 > [snip]
 >
 > > When compiling it, the error is as follows,
 >
 > > class Location_Prototype is public, should be declared in a file named
 > > Location_Prototype.java
 > > public interface Location_Prototypr
 > >          ^
 >
 > > I don't understand why. Anyone can help me?
 >
 > As the error says. You have to declare the Location_Prototype in a
 > separate
 > java file (Location_Prototype.java) and then import it (import
 > registration.core.Location_Prototype;) in the Location.java file where 
you
 > declare the Location class.
 >
 > In java _every_ public class _has_ to be declared in a file with the same
 > name as the class.
 >
 > Kind regards
 > --
 > Damir Arh, programmer
 > Windows and Amiga developer
 > Visit: http://damir.gajba.net/
 >
 >
 >
 > Java Help for Beginning Programmer's.
 >
 >
 > Java Help for Beginning Programmer's.

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