Package and applet

I am reading about Zhiqun's Java Card book,
and I wonder about the relationship between a package and an applet.
Am I right in saying:
1. An applet comprises one or several packages
2. A package only belongs to one applet
3. One package is one group context
Hope to get your guidance.
B.R.
RuHE

Refers to your assertions,
Please help me..
Case 1
I have package A. Package A contains 2 class (A1 & A2 ) and 2 package (B and C).
Then, I make 2 applet, they are applet-B (for package B) and applet-C (for package C).
When simulationi in JCWDE, applet-B and applet-C have no problem. But, in CREF, applet throw exception and status word is 6443.
Case 2
When I try to include class A1 and A2 into package B and C, so package A is empy. Surprisingly, applet-B and applet-C can run in CREF and JCWDE. I don't know, what's wrong in case 1.
Can you give me explanation or explanation about problem in above...?
Best Regards,
Wiwit

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- package ml.algorithm (c:\classes\ml\algorithm)
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Arthur
MyBlog
Twitter

Creation of developement class,package and access key

COULD ANYBODY EXPLAIN about
creation of developement class,package and access key
and who will create them?

Working With Development Objects
Any component of an application program that is stored as a separate unit in the R/3 Repository is called a development object or a Repository Object. In the SAP System, all development objects that logically belong together are assigned to the same development class.
Object Lists
In the Object Navigator, development objects are displayed in object lists, which contain all of the elements in a development class, a program, global class, or function group.
Object lists show not only a hierarchical overview of the development objects in a category, but also tell you how the objects are related to each other. The Object Navigator displays object lists as a tree.
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For example:
Selecting an Object List in the Object Navigator
To select development objects, you use a selection list in the Object Navigator. This contains the following categories:
Category
Meaning
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A list of all of the development classes in the SAP System. This list is arranged hierarchically by application components, component codes, and the development classes belonging to them
Development class
A list of all of the objects in the development class
Program
A list of all of the components in an ABAP program
Function group
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Class
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Internet service
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See also Integrating Internet Services.
Local objects
A list of all of the local private objects of a user.
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http://help.sap.com/saphelp_46c/helpdata/en/d1/80194b454211d189710000e8322d00/content.htm
Creating the Main Package
Use
The main package is primarily a container for development objects that belong together, in that they share the same system, transport layer, and customer delivery status. However, you must store development objects in sub-packages, not in the main package itself.
Several main packages can be grouped together to form a structure package.
Prerequisites
You have the authorization for the activity L0 (All Functions) using the S_DEVELOP authorization object.
Procedure
You create each normal package in a similar procedure to the one described below. It can then be included as a sub-package in a main package.
To create a main package:
1.       Open the Package Builder initial screen (SE21 or SPACKAGE).
2.       In the Package field, enter a name for the package that complies with the tools Naming Conventions
Within SAP itself, the name must begin with a letter from A to S, or from U to X.
3.       Choose Create.
The system displays the Create Package dialog box.
4.       Enter the following package attributes:
Short Text
Application Component
From the component hierarchy of the SAP system, choose the abbreviation for the application component to which you want to assign the new package.
Software component
Select an entry. The software component describes a set of development objects that can only be delivered in a single unit. You should assign all the sub-packages of the main package to this software component.
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Main Package
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5.       Choose Save.
6.       In the dialog box that appears, assign a transport request.
Result
The Change package screen displays the attributes of the new package. To display the object list for the package in the Object Navigator as well, choose from the button bar.
You have created your main package and can now define a structure within it. Generally, you will continue by adding sub-packages to the main package. They themselves will contain the package elements you have assigned.
See also
Adding Sub-Packages to the Main Package
http://help.sap.com/saphelp_nw04/helpdata/en/ea/c05d8cf01011d3964000a0c94260a5/content.htm
access key used for change standard program.
www.sap.service.com

Package and applet

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