Default implementations of JPDK V2 classes and interfaces - is the source code?

Hi
Is the source code for all the default implementations of the JPDK interfaces, renderers etc. available somewhere?
Regards
Harry

Please find jpdk samples sources for jpdk implementation under src.zip inside PDK.zip
In addition, one can many articles related to PDK under articles folder.

Similar Messages

Jars and .class files - security of the source code

Hi,
I have an app that is in a jar file with the .class files (so no source code).
I'm wondering how difficult it is to attain the source code from these .class files in my jar? Looking through the contents of the .class files it seems there is a large amount of readable text. For example I see method names, variables, etc.
This leads me to believe these jars are not secure. What is a better way?
Thanks!
Edit:
Looking around, I've noticed many java decompilers and Sun even supports a dissembler - javap. I think this is not cool, haha.
What way can I protect my code? To me, the value of java just went way down due to the ease at attaining source code (based on what I read in the past hour or so. I have yet to try it myself). I wonder if this impacts companies reasons not to use java?
Edit 2:
I heard that there may be a way to make the jar closed, so you can't say, use winrar, to extract the class files. Does anyone know anything about this?
Message was edited by:
dayrinni
Message was edited by:
dayrinni

Hi,
I have an app that is in a jar file with the .class
files (so no source code).
I'm wondering how difficult it is to attain the
source code from these .class files in my jar?
Looking through the contents of the .class files it
seems there is a large amount of readable text. For
example I see method names, variables, etc.
This leads me to believe these jars are not secure.
What is a better way?
Thanks!
Edit:
Looking around, I've noticed many java decompilers
and Sun even supports a dissembler - javap. I think
this is not cool, haha.
What way can I protect my code? To me, the value of
java just went way down due to the ease at attaining
source code (based on what I read in the past hour or
so. I have yet to try it myself). I wonder if this
impacts companies reasons not to use java?All intellectual property stored in electronic form is vulnerable. Not just Java bytecode. You can use tools called obfuscators to make decompiling more difficult, which is usually good enough. The truth is, no matter how great you think your code is, it's of a lot less interest to others than you actually think. Unless you've got a particularly sexy argorithm or something, it's not really worth worrying too much about
All you can do is make it more difficult for people to crack things, never prevent it. True of all languages, all electronic media

Extracting operators and operands from the source code

Hi there,
I am looking for a way to extract operators and operands from a source code to do a complexity analysis of the code. The final outcome I am expecting is to get the number of operators and operands in the code, to perform a Halstead Complexity Analysis.
Please let me know how this parsing can be done apart from just doing a sequential search of the content in the file.
Any samples and references are highly appreciated.
Thanks in advance!
Regards,
Aravinda777

Common way to analyze code is to defining the things you are interested in using some approproate language and then using a parser generator (or compiler compiler = cc). I used antlr some time ago for this reason. Perhaps you want to take a look at it:
http://www.antlr.org/

About Classes and Interfaces

How can we define the classes and interfaces in an interview can u give me any realtime example for this

How can we define the classes and interfaces in an
interviewThe easiest explanation probably is to say that an interface in Java is a special class, namely a totally abstract one, that has been given a separate name.
Classes and interfaces (because they're classes in disguise) both constitute types, meaning that variables can be declared of them. The difference is that a class can carry implementation whereas an interface cannot (because it's totally abstract).
Java has single inheritance of implementation which means the the inheritance of classes is restricted to exactly one while you can inherit as many interfaces you like.

Newbie - Boss classes and interfaces

I'm currently going through Kris Coppieters' "Adobe InDesign CS3/CS4 SDK Programming Getting Started" book and I'm stuck at one of the exercise (11.9) It asks me to create a new boss 'kIDSDKTrainerBoss' which aggregates 2 interfaces 'ISDKTrainerName' and 'ISDKTrainerBlob'.
Now here is what I added in my .fr file:
Class
        kIDSDKTrainerBoss,
          kDialogBoss,
            IID_ISDKTRAINERNAME, kISDKTrainerNameImpl,
            IID_ISDKTRAINERBLOB, kISDKTrainerBlobImpl,
First of all I'm not quite sure about the interface IDs. Are IID_ISDKTRAINERNAME and IID_ISDKTRAINERBLOB suitable?
What are the files that I need to create? I guess there will be a ISDKTrainerName.cpp and ISDKTrainerBlob.cpp but apart from those?
How to know which parent Boss ID to use? Here I've put kDialogBoss, but that was just to mimic the other bosses in the .fr file.
Is there somewhere where I can get the source code with the solution, it's not in the zip file provided along with the book?
Thanks in advance for your help
-- Bastien

Hi Bastien,
Instead of using kDialogBoss, you should use kInvalidClass. That means 'this boss does not have a superclass at all' - making it a 'root boss class', which does not inherit from anything.
The goal of the exercise is to build a totally new, detached boss class - something that's not tied into any other boss classes in the InDesign ecosystem.
The interface IDs are whatever you want to make them - the ones you have there are fine, but you can make something else up. The main thing is to try and follow the convention - but also realize that it's only convention. If you wanted to you could use IID_BOBTHEBUILDER and IID_THOMASTHETANKENGINE. By convention, you'd then probably name the implementations kBobTheBuilderImpl and kThomasTheTankEngineImpl
Define those IDs in your ...ID.h file - they're yours, and you're the master and decider of how you call them - whether it's IID_ISDKTRAINERNAME or IID_BOBTHEBUILDER.
For a clue on the source code file names - look at the figure on page 120 - that sample uses IID_ISOMETHING and IID_ISOMETHINGOTHER as 'silly' names, and also shows the names of the source code files that by convention would go with them.
Cheers,
Kris

Question about Classes, Abstract Classes and Interfaces.

I have been experimenting with Classes, Abstract Classes and Interfaces and wonder if anyone can explain this to me.
I was looking for a way to assign a value to a variable and then keep it fixed for the session and have devised this.
First I create an abstract class like this:
public abstract class DatabaseConnection {
private static String ServerName = null;
public static void setServerName(String serverName) {
          ServerName = serverName;
     public static String getServerName() {
          return ServerName;
}and then I created an interface
public interface DatabaseAccess {
     String servername = DatabaseConnection.getServerName();
}And finally the class itself with some test lines in it so I could see what was going on:
public class CreateDatabase extends DatabaseConnection implements DatabaseAccess {
     public static void main (String args[]){
          new CreateDatabase();
     public CreateDatabase(){
          setServerName("Server Name 1");
          System.out.println ("Before update ");
          System.out.println ("ServerName from Interface           = " + servername);
          System.out.println ("ServerName from Abstract Class = " + getServerName());
          System.out.println ("After update ");
          setServerName("Server Name 2");
          System.out.println ("ServerName from Interface           = " + servername);
          System.out.println ("ServerName from Abstract Class = " + getServerName());
          System.out.println ("==========================");
}The output I get from the above is:
Before update
ServerName from Interface           = Server Name 1
ServerName from Abstract Class = Server Name 1
After update
ServerName from Interface           = Server Name 1
ServerName from Abstract Class = Server Name 2
==========================I also tried this in another class which calls the above class to see if I get the same effect
public class CheckDatabaseAccess {
     public static void main (String args[]){
          new CreateDatabase();
          CreateDatabase.setServerName("Server 3");
          System.out.println("CreateDatabase "+CreateDatabase.servername);
          CreateDatabase.setServerName("Server 4");
          System.out.println("CreateDatabase "+CreateDatabase.servername);
          CreateDatabase.setServerName("Server 5");
          System.out.println("CreateDatabase "+CreateDatabase.servername);
}The output of which is this:
Before update
ServerName from Interface           = Server Name 1
ServerName from Abstract Class = Server Name 1
After update
ServerName from Interface           = Server Name 1
ServerName from Abstract Class = Server Name 2
==========================
CreateDatabase Server Name 1
CreateDatabase Server Name 1
CreateDatabase Server Name 1Can anyone explain why I appear to only be able to change or set the ServerName only the once?
Is this the correct way to do it? If it is it's exactly what I am looking for, a way to set the value of variable once in a session and then prevent it being changed.
Or is there a better way of doing this.
What I want to use this for is for example, storing the accesses to a database on a server. I won't know what server the database will be stored on nor what the database is called so I create an INI file which stores this information in encrypted format, which is set by the database administrator. It occurs to me I can use this method to then retrieve that data once and once only from the INI file and use that throughout the life of the session to access the database.
Any help appreciated
Regards
John

Not gonna read all of it, but this jumps out:
public abstract class DatabaseConnection {
private static String ServerName = null;
public interface DatabaseAccess {
     String servername = DatabaseConnection.getServerName();
}You have two completely separate variables (with two different names, for that matter, since you were inconsistent in your capitalization, but it wouldn't make a difference if they did have the same name with the same case). And the one in the interface is implicitly public, static, and final.
Anytime you refer to "servername" through a reference of type DatabaseAccess, it refers to the one declared in the interface.
Anytime you refer to "ServerName" inside the DatabaseConnection class, it refers to the one declared in that class.

What is the difference between Abstract class and Interface ?

Hi,
Could u plz tell me the difference between Abstract class and Interface?
Thanks in advance.
Gopi

Lots.
An abstract class can contain some method implementations, or indeed all the method implementations. It may contain methods with all the various access modifiers. It cannot be instantiated. A class may inherit from only a single abstract class.
An interface contains only public method stubs and constants. A class may implement multiple interfaces. An interface cannot (obviously) be instantiated.
Abstract classes are particularly useful when you need to provide a semi-complete implementation for reuse. Interfaces are used more like types.
Look at java.util.* for some good examples of the use of both.

Difference between abstract classes and interfaces

I actually wonder about what are the differences between abstract classes and interfaces may somebody give an example code about it?
and i have one more question how can i use interfaces like multiple inheritance ? i mean when i implement an interface like
class a extends b implements c,di have to use all c and d methods but what that methods means?
I mean as i know we cannot make implementations of methods in interfaces
but for example in runnable interface there is a method like run() and it has been defined somewhere because it knows what to do(i mean when it will run), i just write my code into that method .

Once you get past the starting point (I am referring to the OP here), there are a few salient differences:
You can only extend (or generalize) a single superclass; however, you can implement (or realize) multiple interfaces. As such, all things being equal, using an interface in lieu of an abstract class 'frees' your design. Later, if you want the implementor of an interface to inherit from another class, there is not issue.
Any abstract method specifies a contract. However, abstract classes allow you to also add common behavior to subclasses. This is an overused justification for abstract classes, IMO. You can achieve the same effect using delegation and still having interfaces.
Always program to interfaces wherever possible. This means that you define an interface and have an implementing class (usually at a minimum). Do not do this for all your classes, but rather the ones that make your system unique (the domain model or M in MVC architecture). This allows you to later change implementation with a minimal amount of refactoring. This is a core precept from the Group of Four and any number of decent programming books.Best of luck.
- Saish

Difference between abstact class and interface

hi
i am new in java.
plz tell me abstract class support which type of polymorphisam and
interface support which type of polymorphisam
plz explain
bye
siva

There's only one type of polymorphism.
Does that make it mono-polymorphism? ;)
Indeed - do a search for the forums.
The short answer is that both abstract classes and interfaces define required method signatures for subclasses that extend/implement them, but abstract classes can have implementation for some or all methods that are not abstract; interfaces have no implementation whatsoever for any methods.

Abstract class and interface????

hi all, i would like to know the difference between abstract class and interface....could anybody enlighten me on this....

Like the others have mentioned you can implement more than one interface, but only inherit from one abstract class. An abstract class can provide some implementation.
steve http:\\www.jamonapi.com

Compiling Nested Classes and Interfaces

I am looking for documentation about compiling nested classes and interfaces. I have found something in the JVM Specification, but there does not explain how a nested class is compiled and what is included in the top level class to mark a "place holder" to the nested class. The JVM Specification in this topic cite the web page http://java.sun.com/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc.html that does not exists any more.
My root problem is that: I am compiling a class with a private nested class, but in the class file generated TopLevelClass$NestedClass.class the class does not have the private modifier. So I am not understanding why the "private" modifier was removed during compilation.
I performed the same test with a protected nested class and the result was the nested class with the public modifier. So I am not understanding why the "protected" modifier was changed to "public".
Thanks in advance,
Mardoqueu.

This should not be happening. What compiler are you using? If it's a reasonably recent Sun compiler, could you post a minimal example?

Documentation for Oracle XML parser Classes and Interfaces

I would like to use the oracle XMLParser V2 classes with JDeveloper 3.1, but I cannot find any reference documentation for the classes and interfaces in help.
I am especially interested in a documentation for the XSLProcessor class. The only information I found was provided with the few provided samples.

I don't think the javadoc for this was included in the release. You can get the Javadoc (as well as the latest version of the XML Parser v2) here on OTN.
Take Care,
Rob
null

What are the classes and interface in JDBC

Please anybody tell me
What are the Classes in JDBC?
and
What are the Interfaces in JDBC?
Will you please show the classes in one table and interfaces in one table. Plesae
regards
pooja.

Hi jeyan,
Very more thanks. I am searching lot of time in net to exactly get the classes and interface in jdbc. Now you have given helpful link.
thank you.
regards
pooja

Difference between Abstarct Class and Interface

HI,
Here is a simple one for the gurus but quite important for me.
What is the difference b/w an Interface and an abstract class?
Why do we need each one of them?
I would appreciate if you people can give examples of each so that I amy understand fully
Thanks in advance...

A normal class (not abstract) has a special behaviour, like java.awt.Frame. A Frame is a frame no matter how you subclass it. If you create a subclass it will still be able to be displayed by calling it's show method. So by using a normal class you can create a type of class.
An abstract class does the same, but it leaves some of the code unwritten. For instance java.lang.Number. This class is abstract becuase it has no knowledge of how to store the number in memory. But it knows that it is a number, and any subclass will still be a number. You could create a subclass of Number that can hold the time in milliseconds and checks your system clock to see what the time is, it could also have methods that return the time in another country, but it would still be just a Number.
An interface is a way to describe what an object can do, not what it is. So with java.lang.Comparable as an example you can make any class comparable. This means that no matter what type of object you have, it can be compared with other objects. So you can have a subclass of Frame that can be compared with other windows. Or a subclass of Number that can be compared with other Numbers. You can even compare those two different types if you like. So you could compare a window with a number.
That is the difference between abstract classes and interfaces.
I hope you could follow my arguments, it isn't an easy subject,
Daniel

What happens as we use strictfp modifier with class and interface ?

I just knew that strictfp can't be used with variables?
I want to know that why we use strictfp with class and interface?

makpandian wrote:
i hope i can understand if you explain myself.Okay, let me go ahead and try to explain yourself.
The concept of a makpandian can be summed up as the following: a simple-minded, java forum-goer who posts questions directly from his SCJP 6 study guide in hopes that forum members will give him a simple answer that he can correlate to a multiple-choice response. By doing this, the makpandian suspects that passing the SCJP 6 exam will become a tangible reality, thus enabling it to obtain a job in the public work sector (given the great significance of this type of certification in the makpandian's presumed country of origin (India, for those of you who aren't following along)).
So how'd I do? Did I do a good job of explaining yourself?

Default implementations of JPDK V2 classes and interfaces - is the source code?

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