About executing class files....

[sukatoa]

I have a class file that instantiates an object from a jar file
or simply a class file inside the jar file is used as part of the simple program....

When we use the the jar file in JSP, we simply put the complete filepath of the class files inside the manifest file(Name:) an enable the Java-Bean setting( set to true) then solved....(ready to use)

What comes to mind is, im taking the short road, without an experience of running a class file that accessing another classfile(which is inside the jar file)...( Running a unjarred stand-alone application that uses another classfile inside the jar)

i know how to compile it, javac -cp jarname.jar test.java

but, i don't know how to execute it.....

The jar file already been set-up, the index.list and the Name set to common...
Which i found on a tutorial on the net....

But, in my case, i've got nothing on the web.....

Please let me know experts what is the pattern for executing such classfile like this scenario...... or a url that directly teach me how to deal with it....

Waiting,
sukatoa.

[JosAH]

I don't understand your question. What do you mean by 'that instantiates an
object from a jar file'? A .jar file simply contains classes and other resources.

kind regards,

Jos

[sukatoa]

I don't understand your question. What do you mean by 'that instantiates an
object from a jar file'? A .jar file simply contains classes and other resources.

kind regards,

Jos

Apologize!!!! :(

Actually, im on the experiment now,

I have created an API for my JSP project.....
Which is jarred and no problem about that.....

But i have a problem when im gonna use that on a stand-along program

What i really don't know is the following:

suppose i have a class file named SQLDriver that was jarred....(MyJar.jar)
and i have a class file(not jarred) named SQLDriverTest

im going to use that SQLDriver class that was jarred from my SQLDriverTest

javac -classpath MyJar.jar SQLDruverTest,java
successfully compiled

The problem is, i don't know how to execute the SQLDriverTest

Can you teach me how to do it Jos?
This is really an urgent, i need to distribute this to my groupmates as soon as possible, because i have created a stand-alone application that updates the database every 10 seconds and they must use that to be able test what they have done in their part.

The stand-alone app will do the following:

Delete those expired reservations
Move those guests that suspectedly a criminal/terrorists
Do Admin's priviledge
Setting-up a database schema, its table and the columns

[JosAH]

The JVM doesn't care where those classes come from: either from their own
file or read from a .jar file or whatever; that is the concern of the ClassLoader.
The SystemClassLoader (the one you use by default) uses a 'classpath' variable
for that purpose. That variable is a list of directories and/or .jar files. If that
ClassLoader needs to load a file it checks the classpath and searches all those
directories and/or mentioned .jar files for the wanted class.

If, e.g. you store your .class files in directory /foo and your myJar.jar file in a
directory /bar you should use a command line like this:

java -cp=/foo;/bar/myJar.jar MyClass
 

The class MyClass can be stored in that .jar or in directory /foo; it doesn't matter
and the ClassLoader will look in that directory or .jar file for all the classes it
needs to load.

kind regards,

Jos

ps use a colon instead of a semicolon for the separator of the elements in the
classpath variable if you're using Un*x.

[sukatoa]

i got an error here.....

NoClassDefFoundError test

test is the SQLDriverTest

im compiling them on the same folder

java -cp DMA_OpenSource_API.jar test
is that correct?

or should i put them in a sub folder? like what you've suggested?

[JosAH]

No that is not correct because you're not compiling anything there; you're trying
to fire up the JVM.

kind regards,

Jos

ps. also study this.

[sukatoa]

No that is not correct because you're not compiling anything there; you're trying
to fire up the JVM.

kind regards,

Jos

I forgot to mention,

It was already compiled using

javac -cp DMA_OpenSource_API.jar test.java


and now, my latest reply doesn't seem to work....
java -cp DMA_OpenSource_API.jar test

Error: NoClassDefFoundError: test

[JosAH]

I forgot to mention,

It was already compiled using

javac -cp DMA_OpenSource_API.jar test.java


and now, my latest reply doesn't seem to work....
java -cp DMA_OpenSource_API.jar test

Hrm; is that test class a class in a package? Also be sure to include the current
directory in your classpath like so:

java -cp DMA_OpenSource_API.jar;. test
 

kind regards,

Jos

ps. see the ps I added a bit later in my previous reply.

[sukatoa]

Hrm; is that test class a class in a package? Also be sure to include the current
directory in your classpath like so:

java -cp DMA_OpenSource_API.jar;. test
 

kind regards,

Jos

ps. see the ps I added a bit later in my previous reply.

hahahahahahhhh....... You're a God like Jos,

You got it, the dot ( . ) is i really don't know if they are on the same folder and im also on that folder using cmd......

Thank you very much Jos...... :)

[JosAH]

hahahahahahhhh....... You're a God like Jos,

I know ;-)

You got it, the dot ( . ) is i really don't know if they are on the same folder and im also on that folder using cmd......

Thank you very much Jos...... :)

You're welcome of course but also read that link I supplied in reply #6 so that
you'll understand completely what that classpath is all about.

kind regards,

Jos

[sukatoa]

You're welcome of course but also read that link I supplied in reply #6 so that
you'll understand completely what that classpath is all about.

kind regards,

Jos

Yes, i will.......................... :)

[sukatoa]

I got new problem here......

I've jarred my test.class, added Class-Path: DMA_OpenSouce_API.jar(with the com folder added)
successfully run.....

Now, I would like to have that mysql-connector-java-5.0.8-bin.jar independently.....
Instead of adding the com folder(from mysql-connector-java-5.0.8-bin.jar) into my DMA_OpenSouce_API.jar,

Now, i don't know how to add another path here.....

I've made: Class-Path: DMA_OpenSouce_API.jar; mysql-connector-java-5.0.8-bin.jar(newline)

to the manifest(From my test.jar), but it doesn't work...... How can i reproduce that one?
Jos, what can you recommend about this?

waiting,
sukatoa

PostScript: The test.jar, DMA_OpenSouce_API.jar and the mysql-connector-java-5.0.8-bin.jar are on the same folder.....

[r035198x]

I got new problem here......

I've jarred my test.class, added Class-Path: DMA_OpenSouce_API.jar(with the com folder added)
successfully run.....

Now, I would like to have that mysql-connector-java-5.0.8-bin.jar independently.....
Instead of adding the com folder(from mysql-connector-java-5.0.8-bin.jar) into my DMA_OpenSouce_API.jar,

Now, i don't know how to add another path here.....

I've made: Class-Path: DMA_OpenSouce_API.jar; mysql-connector-java-5.0.8-bin.jar(newline)

to the manifest(From my test.jar), but it doesn't work...... How can i reproduce that one?
Jos, what can you recommend about this?

waiting,
sukatoa

PostScript: The test.jar, DMA_OpenSouce_API.jar and the mysql-connector-java-5.0.8-bin.jar are on the same folder.....

Read here.
not Jos

[sukatoa]

Ok, i got it, here is the link......

No semi-colon anymore......

PS: Thanks for the url r035198x, I think google doesn't know what i really like to look for..... :(

[sukatoa]

Ok, i got it, here is the link......

No semi-colon anymore......

PS: Thanks for the url r035198x, I think google doesn't know what i really like to look for..... :(

Ok, here is a new problem again,

My DMA_OpenSouce_API.jar wants to access a class from mysql-connector-java-5.0.8-bin.jar.... not my test.jar....

So, in common-sense, i should not add the classpath for the mysql-connector-java-5.0.8-bin.jar in my test.jar, instead, i should add it from the manifest of my DMA_OpenSource_API.jar......

But i don't know how....

Here is the content of DMA_OpenSouce_API.jar

MANIFEST.MF:

Manifest-Version: 1.0
Specification-Title: DMA OpenSource™ API Specification
Created-By: 1.0 (DMA OpenSource™ Inc)
Implementation-Title: Java Runtime Environment
 
Name: common
 

INDEX.LIST

JarIndex-Version: 1.0
 
DMA_OpenSource_API.jar
dma
dma/constants
dma/data
dma/data/secure
dma/db
dma/files
dma/printer
dma/system
dma/time
dma/utility
dma/utility/converter

Now, i don't know where to put such Header "Class-Path", since all the tutorials i saw on the web is all about dealing such scenario with the main-class

Please do correct me if i forgot something here....

Waiting again,
sukatoa

[r035198x]

I don't see a ClassPath entry at all in that manifest ...

[sukatoa]

I don't see a ClassPath entry at all in that manifest ...

yah, i've attempted to add Class-Path below the Name: common, (ERROR)

I also tried to add the contents of the INDEX.LIST from connectorJ.jar into my DMA_OpenSource_API.jar, (ERROR)

That is why i didn't add the classpath their, since all of my attempts are not successful.....

@123: By the way, im already a year in Java, but i still don't see any Libraries that connects to other libraries, is it already exists? or am i too innocent about this?

Please let me know,

my resolution is to break the dma/db from the DMA_OpenSouce_API.jar and add it to a new jar that contains the com folder(where the Driver.class can be found), since it is all about simplifying database handling.....(My purpose is only for the scope of our project)

If i am innocent about "@123", then, sooner or later i will dive to that implementation again....

Thanks for all of your replies Jos and r035198x, That really helps.....

already have a peace of mind,
sukatoa

[JosAH]

Here's how I do it:

Manifest-Version: 1.0
Created-By: DADID Systems
Main-Class: IDEMain
Class-Path: rpl.jar utilities.jar resources.jar rpldb.jar derby.jar
Built-By: DADID Systems
Name: RPL ide
Specification-Title: RPL ide Application
Specification-Version: 1.0
Specification-Vendor: DADID Systems
Implementation-Title: RPL ide Application
Implementation-Version: 1.0
Implementation-Vendor: DADID Systems
 

The name of my little company is 'DADID Systems'. The application uses a couple
of jars, mentioned on the Class-Path: line. The IDEMain class has the main()
method and that class is present in one of the mentioned jars. A few of the
name dropping lines can be left out of course.

kind regards,

Jos

[sukatoa]

Here's how I do it:

Manifest-Version: 1.0
Created-By: DADID Systems
Main-Class: IDEMain
Class-Path: rpl.jar utilities.jar resources.jar rpldb.jar derby.jar
Built-By: DADID Systems
Name: RPL ide
Specification-Title: RPL ide Application
Specification-Version: 1.0
Specification-Vendor: DADID Systems
Implementation-Title: RPL ide Application
Implementation-Version: 1.0
Implementation-Vendor: DADID Systems
 

The name of my little company is 'DADID Systems'. The application uses a couple
of jars, mentioned on the Class-Path: line. The IDEMain class has the main()
method and that class is present in one of the mentioned jars. A few of the
name dropping lines can be left out of course.

kind regards,

Jos

Thanks for your reply Jos,

I have a question,

Does any of your jars accesses one another except your main jar? or all of them are being used only at the main jar?

if not clear, please let me know,

[JosAH]

Thanks for your reply Jos,

I have a question,

Does any of your jars accesses one another except your main jar? or all of them are being used only at the main jar?

Yep, quite a lot of classes in one jar access/use other classes from the other jars.
That isn't a problem as long as those jars are mentioned in the classpath.

kind regards,

Jos