Packaging and accessing resources in a JAR

I'm working on an application and I would like to package my resources (icons, about dialog images, splash screen images, release version text, etc.) in the jar file I'm going to distribute for deployment. I would like to access these resources from the JAR file in my deployed code. But I would also like them accessible when I'm running the code in my Eclipse IDE. Is there a way to do this using only one code base?
My Eclipse project structure is src (folder) which contains my source code, bin (folder) which contains my class files and res (folder) which contains my resource files.
I am using the javapackager utility to create my deployment JAR and build a self-contained deployment .exe for deploying to Windows.
Is there a way to have the javapackager build a single JAR file from multiple sources (i.e. my bin and res folders)? What do I have to do in my code so that the same code can be used to load resources when I'm running in Eclipse and the self-contained deployment?
Thanks,
Mike

The Java Tutorials has several trails for loading resources.
Retrieving Resources (The Java™ Tutorials > Deployment > Java Web Start)
Use the getResource method to read resources from a JAR file. For example, the following code retrieves images from a JAR file.
// Get current classloader
ClassLoader cl = this.getClass().getClassLoader();
// Create icons
Icon saveIcon = new ImageIcon(cl.getResource("images/save.gif"));
Icon cutIcon = new ImageIcon(cl.getResource("images/cut.gif"));
The example assumes that the following entries exist in the application's JAR file:
•images/save.gif
•images/cut.gif
See that last sentence?
You put what you need in the jar file and then use the 'getResource' methods to load them.

Similar Messages

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.
The topmost node of an object list is the development class. From here, you can navigate right down to the lowest hierarchical level of objects. If you select an object from the tree structure that itself describes an object list, the system displays just the new object list.
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
Application hierarchy
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
A list of all of the function modules and their components that are defined within a function group
Class
A list of all of the components of a global class. It also lists the superclasses of the class, and all of the inherited and redefined methods of the current class.
Internet service
A list of all of the componentse of an Internet service:
Service description, themes, language resources, HTML templates and MIME objects.
When you choose an Internet service from the tree display, the Web Application Builder is started.
See also Integrating Internet Services.
Local objects
A list of all of the local private objects of a user.
Objects in this list belong to development class $TMP and are not transported. You can display both your own local private objects and those of other users. Local objects are used mostly for testing. If you want to transport a local object, you must assign it to another development class. For further information, refer to Changing Development Classes
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.
Exception: Sub-packages that will not be delivered to customers must be assigned to the HOMEsoftware component.
Main Package
This checkbox appears only if you have the appropriate authorization (see Prerequisites).
To indicate that the package is a main package, check this box.
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

Accessing resource files inside Jar using Fat Jar Eclipse plugin

Hi,
I want to develop single JAR file that uses a set of other JAR libraries. I am using Fat Jar Eclipse plugin. It works fine. However, I have problem to access resources files (i.e. rdf file) using relative path from my classes. Is there any idea how can I pack, set classpath and use relative path in order to make it works.
Thanks
Zoran

I have solved this problem. The problem was in a way how I have trying to access it. It should be like:
URL fileURL = this.getClass().getResource("resource/myFile.rdf");
Zoran

Load Jar and access a class in jar at run time

I need help from you.
How to load a Jar and access a class in the jar at run time?
When i try the following code it works fine while running in Java (Jdk1.5).If iam running the same code in servlet,ClassCastException occurs.
Error Message : ClassCastExcption : jartest1 cannot be cast to Thing
test.jar contains jartest.class and Thing.class
jartest1.java
try{
File file =new File("test.jar");
String lcStr ="jartest";
URL jfile = new URL("jar", "", "file:" + file.getAbsolutePath() +"!/");
URLClassLoader cl = URLClassLoader.newInstance(new URL[] { jfile });
Class loadedClass = cl.loadClass(lcStr);
Thing t=(Thing)loadedClass.newInstance();
t.execute();
catch(Exception e)
System.err.println(e);
Thing.java
public interface Thing
void execute();
jartest.java
public class jartest implements Thing
public void exceute()
System.out.println("Welcome");
Thanks and Regards
V.Senthil Kumar
Edited by: senthilv_sun on Dec 16, 2008 8:30 PM

senthilv_sun wrote:
I need help from you.
How to load a Jar and access a class in the jar at run time?
When i try the following code it works fine while running in Java (Jdk1.5).If iam running the same code in servlet,ClassCastException occurs.
Error Message : ClassCastExcption : jartest1 cannot be cast to ThingPresumably we can only hope that that is a transciption error. It always helps to use copy and past actual errors and code rather than manually typing them.
test.jar contains jartest.class and Thing.classWrong.
The interface class and plugable class must not be in the same jar.
A plugable interface requires two components
- Interface (generic sense)
- Functional components.
The Interface must be independant (own jar) so that it is available to the framework (user of plugin) and to the functional components. And the plugable component must not be on the java class path.
This also means that we know for certain that the plugable component is also on the system class path. That is a bad idea as well.
Given that it is pretty pointless to even speculate as to why this error is showing up. Create the correct jar layout. Test using the command line. Then test using servlets. Insure that the plugable jar is NOT on the java classpath for both tests.

Understanding the combination of inheritance, packages and access modifiers

I am working on a problem to help my practical understanding of accessing inherited members and methods from a different package using both inheritance and instance variable.
Unfortunately, I am totally lost when I tried to set this up and understand what was happening.
Problem:
Create a class named "classA" under package "pack1" with 4 members (int pub_a, int priv_a, int prot_a, int def_a) and methods (pub_func1, priv_func1, prot_func1, def_func1). Mark the members and methods with 4 different access specifiers (public, private, protected, and default)
Create a class named "classB" under package "pack2", ClassB will inherit classA of package pack1. ClassB will have 2 members (int pub_b, int priv_b) and methods (pub_func2, prot_func2) with 2 different access specifiers (public, protected)
Try accessing the members of class classA in package pack1 inside class classB of package pack2. Find out what members and methods are accessible and not-accessible through inheritance.
Create an instance of class classA inside class classB of package pack2. Find out what members and methods are accessible and not-accessible through the instance.
Note: In your solution, comment out the lines that are in-accessible with the actual error message at the top of the comment.
So I produced the following code (I don't think i set this up right):
//filename A.java
package pack1;
public class A {
     public int pub_a;
     private int priv_a;
     protected int prot_a;
     int def_a;
     public int pub_func1() {return 1;}
     private int priv_func1() {return 2;}
     protected int prot_func1() {return 3;}
     int def_func1() {return 4;}
//filename B.java
package pack2;
import pack1.A;
public class B extends A{
     public     int pub_b;
     private int priv_b;
     public int pub_func2() { return 5; }
     private int priv_func2() { return 6; }
     //directly inherited fields, at least one should be accessible?
     pub_a = 1;
     priv_a = 1;
     prot_a = 1;
     def_a = 1;
     int i;
     // directly inherited methods, at least one should be accessible?
     i = pub_func1();
     i = priv_func2();
     A a = new A();
     //not sure what's accessible here, as no error red underlines appear
     a.pub_a = 1;
     a.priv_a = 1;
     a.prot_a = 1;
     a.def_a = 1;
}I would be interested to know how one would approach and address this problem.

//filename B.java
package pack2;
import pack1.A;
public class B extends A{
     public     int pub_b;
     private int priv_b;
     public int pub_func2() { return 5; }
     private int priv_func2() { return 6; }
     //directly inherited fields, at least one should be accessible?
     pub_a = 1;//true
     priv_a = 1;// false
     prot_a = 1;//true
     def_a = 1;//false
     int i;
     // directly inherited methods, at least one should be accessible?
     i = pub_func1();//true
     i = priv_func2();//false
     A a = new A();
     //not sure what's accessible here, as no error red underlines appear
     a.pub_a = 1;//true
     a.priv_a = 1;//false
     a.prot_a = 1//false;
     a.def_a = 1;//false
}Edited by: fun_with_me on May 31, 2008 8:30 AM

Accessing resources in a jar

im working on a msn clone in jbuilder 9(enternprise), and im having a really hard time organizing my resources. i have a few icons and i grouped them into a folder name 'icons'. at first, the images can only be loaded when i place them in the class directory, which is fine until i compiled the project into a executable jar. the jar has trouble loading the images, i opened up the jar with winzip and found all the images are included. i also played around with the source for a while but with no luck. im just wondering if this have ever happened to you and how u dealt with it, thank you

package gui;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.ImageIcon;
import java.awt.Component;
import javax.swing.tree.DefaultMutableTreeNode;
import dataobjects.UserStruc;
import javax.swing.JTree;
import java.net.URL;
class IconBuilder
extends DefaultTreeCellRenderer {
ImageIcon online;
ImageIcon offline;
ImageIcon away;
ImageIcon phone;
ImageIcon lunch;
ImageIcon busy;
ImageIcon brb;
ImageIcon idle;
URL onlineURL;
public IconBuilder() {
System.out.println("Creating icons");
onlineURL = gui.IconBuilder.class.getResource("images/online.jpg");//this worked in jbuilder but not in the jar
online = new ImageIcon(onlineURL);
//online = new ImageIcon("images/online.jpg");
offline = new ImageIcon("images/offline.jpg");
away = new ImageIcon("images/away.jpg");
phone = new ImageIcon("images/busy.jpg");
lunch = new ImageIcon("images/away.jpg");
busy = new ImageIcon("images/busy.jpg");
brb = new ImageIcon("images/away.jpg");
idle = new ImageIcon("images/away.jpg");
public Component getTreeCellRendererComponent(
JTree tree,
Object value,
boolean sel,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus) {
super.getTreeCellRendererComponent(
tree, value, sel,
expanded, leaf, row,
hasFocus);
DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
UserStruc user = (UserStruc) (node.getUserObject());
if (user.getStatus().compareTo("NLN") == 0) {
setIcon(online);
setToolTipText(user.getUsername() + " (Online)");
else if (user.getStatus().compareTo("FLN") == 0) {
setIcon(offline);
setToolTipText(user.getUsername() + " (Offline)");
else if (user.getStatus().compareTo("BRB") == 0) {
setIcon(brb);
setToolTipText(user.getUsername() + " (BeRightBack)");
else if (user.getStatus().compareTo("AWY") == 0) {
setIcon(away);
setToolTipText(user.getUsername() + " (Away)");
else if (user.getStatus().compareTo("LUN") == 0) {
setIcon(lunch);
setToolTipText(user.getUsername() + " (Out To Lunch)");
else if (user.getStatus().compareTo("PHN") == 0) {
setIcon(phone);
setToolTipText(user.getUsername() + " (On the Phone)");
else if (user.getStatus().compareTo("BSY") == 0) {
setIcon(busy);
setToolTipText(user.getUsername() + " (Busy)");
else if (user.getStatus().compareTo("IDL") == 0) {
setIcon(idle);
setToolTipText(user.getUsername() + " (Idle)");
return this;

Why no warnning as INVISIBLE in package and access control ?

Hi all.
I have made sample source:
---------- Stock.java----------
package stock;
public class Stock {
private int x=1;
int y=2;
protected int z=3;
---------- PrintStock.java ----------
package printstock;
public class PrintStock extends stock.Stock{
public static void main(String[] args) {
PrintStock ps = new PrintStock();
ps.pl();
public void pl(){
// System.out.println(x);
// System.out.println(y);
System.out.println(z);
-----------------SampleC.java----------------------
package stock;
public class SampleC {
public static void main(String[] args) {
printstock.PrintStock ps = new printstock.PrintStock();
Stock s = (Stock) ps;
System.out.println(s.y); // *1
System.out.println(ps.y); // *2
When I use the eclips, *2 gets warning INVISIBLE.
But when I use the JDeveloper 11.1.2.1.0,
*2 gets no warning.
And when I run the sources on JDeveloer 11.1.2.1.0,
I get Error INVISIBLE.
This is a bug of JDeveloper 11.1.2.1.0 ???
Or is there an option parameter for warning INVISIBLE ?
Regards,
Moto

Hi Frank!
Please check the behave on Eclips.
You might get the warning before run.
But you have no warning the behave on JDeveloper.
You might get the Error in running.
Thanks
Mototaker

How can i create and access resource file(with .res ext) in j2me

hi,
i am developing an mobile international application using jsr-238 an optional api to implement the idea of internationalizationand localization.
please tell me how can i create .res files in my application to store strings of different languages.thanks inadvance.

Hello GG RA,
which fileformat do you want to use (binary or ASCII)?
There are some LabVIEW shipping examples for File I/O
You could use the LabVIEW NI Example Finder (Help --> Find Examples..(search item "file")) to get an overview about the different file-formats in LabVIEW.
Hope this helped out and feel free to reply if you have more questions about File I/O in LabVIEW
Best regards
Benjamin

Problem in package and accessing classes in the same directory

i have a class JApplet1 which calls other classes from the same directory.ALL the other classes have a main within them whereas JApplet1 has an init method within it...the problem is this JApplet1 class is not able to call the other classes. there r no compile time errors but at runtime the classes are not being called...what should i do....suggestions plz..

What exception are you getting?

Project Online - offline project plan prompts for date range to be entered when accessing Resource Usage view

When I save a project plan to my local computer from Project Online and open it up in an offline mode and access Resource Usage view I get prompted with Date Range dialog boxes with the first one saying "Show resources/assignments that start or finish
after:" and the second one with "And before:".
I don't have any filters that are setup in Project Online that are not available in offline mode to trigger these prompts.
Please let me know what could be causing the date range prompts. Thanks.

Hi,
You probably retrieve an enterprise filter into your local file. Just open the organizer from MS Project, go to the filter tab (be sure to have your project selected in the drop down menu at the top left of right of the organizer) and delete the date range
filter.
Hope this helps,
Guillaume Rouyre, MBA, MCP, MCTS |

Packaging and listing multiple resources

Hello,
I want to include a directory containing a large number of wav files in an executable Jar file and access them in my program. The number of files is very large and it would be impractical, let alone inelegant, to write code to load each file individually by name, or from a text file or otherwise. In the past I have not needed to package such media files, and have managed by listing the files in a directory and then iterating through the list to load them, as follows:
File f = new File(directoryName);
File[] myFiles = directoryName.listFiles();
for(int i = 0; i < myFiles.length; i++) {
//try to load the file
Is there any way I can do this using URL and ClassLoader, or in some other way that does not depend on the absolute location of the directory? It should also work in an Applet loaded in a browser.
Many thanks.

>
I want to include a directory containing a large number of wav files in an executable Jar file and access them in my program. >Side note: it is generally a good idea to keep compressed formats separate to other media types and classes, and to specify 'no compression' on those Jars. The Zip compression format is not good for compressing such files that already use compression.
>
..The number of files is very large and it would be impractical, let alone inelegant, to write code to load each file individually by name, or from a text file or otherwise. >Why? It is trivial to write code that can read the names, and Ant can produce the file at build time.
>
... It should also work in an Applet loaded in a browser.>This project would be well suited to being launched using webstart. By specifying the media Jars as 'lazy' download, the app. would arrive on screen much faster, then you might use the DownloadService to download them in a background thread or 'as needed'.

How to create package and import from jar file?

Hi all,
I am writing a software and I am not sure how to create a package for the classes.
Say I have two classes in the same directory as follows:
testA.java
==========
package AB;
public class testA
public static void main(String[] args){
     testB myB = new testB();
     System.out.println("A test");
testB.java
===========
package AB;
public class testB
public testB(){
     System.out.println("B constructor");
both file compile without the package heading;
both file compile using: javac -classpath .\ *.java
Question 1:
I cannot run testA by: java -classpath .\ testA
I think it is a syntax error. What is the correct one?
If I run testA by: java testA
The only output I get is: A test
But I am expecting: B constructor /n A test
What went wrong?
Question 2:
I need to use APIs of another software. I have downloaded a .jar file (xxx.jar) with all the classes in it. And I have put "import xxx.*;" in my source file. But the compiler complains about the importing. What is the right way to copmile it?
I have read a couple of tutorials but they don't answer my question.
(I am using windows2000 and don't have the classpath variable.)
Hope some one can help.
Thanks a lot

Try moving testA out of the package and importing 'AB.*;'
If you have:
./testA.class
./AB/testb.class
Then to execute testA from ./ type: java -cp . testA

How to use packages and jar files for applet?

Hi!
My applet takes a class say a.class.
Now this class depends on other classes that are packaged
in a directory and put separately.
I want to put this applet on the web.
So how do I manage the .class files in he package.
I have tried using jar file format.But I was not able to get it working.
Can someone please help me?
Thanks

Use Archive instead of codebase:
<APPLET CODE="MyApplet.class" ARCHIVE="MyApplet.jar" WIDTH=400 HEIGHT=300></APPLET>

Confused about beans, packages, and jars

Hello,
I've created a package that contains three public classes, Animation, Animator, and AnimatedPanel. I won't explain what they do, since it's rather irrelevant; It is important to note that AnimatedPanel extends JLabel. The package is com.buchuki.animations
What I want to do is place the AnimatedPanel onto a JPanel, in Forte. To do this, it appears that I have to make the AnimatedPanel a bean. (or do it using extra code, but that defeats the purpose of using an IDE). I understand the basics of beans, but not much more. I've searched these forums and skimmed the Java Bean tutorial, but haven't found anything helpful. (at least, not completely helpful! ;)
The problem is, I want to make a bean out of the class com/buchuki/animations/AnimatedPanel.class, but not out of the other two classes in that package. However, I will want to use those other two classes to interact with the AnimatedPanel class in the application I am using. (I'll import com.buchuki.animations.*;)
From what I've read, it appears that you have to run the jar command from the parent directory of the package (ie: in animations/com/buchuki/animations, I run the jar command from animations/). But that would include all files in com, would it not? I guess I don't know what to do at all, but how do I make a bean out of AnimatedPanel and yet keep the bean as a part of the package that uses the "helper" classes? Is it a semi-advanced entry in the manifest file?
Thanks,
Dusty

Ok, I've figured out a few things in my research, but it's still not working. I guess that the Java-Bean: True applies to only one package, and not to the jar archive as I first thought.
However, I'm still a little unsure how I can include the package in the jar archive as a part of my program; is it that I should use the extension mechanism mentioned in the jar tutorial?
And at any rate, even with a manifest file like this:
Name: com/buchuki/animations/AnimatedPanel.class
Java-Bean: True
and archiving with:
jar cfm mainfest.txt animations.jar com
This creates the archive, but when I try to add new Java Bean in forte, it says that the archive is not a valid bean. What am I missing? Did I mess up the package thing, the compilation... what?
Thanks again,
Dusty

Read access to procedures,function,packages and triggers

Hi,
I created a user with CREATE SESSION,SELECT ANY TABLE privilege. My objective is to create a user with read only access to other schemas. But the newly created user is not able to read procedures,function,packages and triggers. The new user need read access to procedures,function,packages and triggers. What is the priviege required for this access? Please help me to resolve this issue.
Regards,
Mat.

Hi,
Grant select all will give select privileges to all schema level objects except procedures,function,packages and triggers. But I need to grant read privileges on these objects to newly created user.
Regards,
Mat.

Packaging and accessing resources in a JAR

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