Java Source Code to UML Class Diagram

Can anyone tell me exactly which kinds of relationships may be identified for a UML CLass diagram, directly from 'static' source code..
Note that I am developing my own case tool which will convert from java to uml..
At the moment, I have only managed to get Inheritance and Association relationships..
Where Association is identified by looking at the types of all variables belonging to a class (excluding method variables etc) and if the type of the variable is non-primitive, than I have deduced it is an association relationship with that class.
Would this be the right approach?
Secondly I have noticed in JBuilder, it models dependency relationships by getting all the Imports at the top of the java source file, is this right?? also I have read that a dependency can be modelled by the variable types in operation arguments (paremeterS ?)..
I would also appreciate if someone could clarify the difference betweeen Composition and Aggregation for me and explain if it is possible to identify the two relationships directly from java source code..
Last but not least, what about multiplicity ? am I right in thinking that an instance variable is 0-1, an array declaration is seen as 0-n (fixed number) and a Vector/ data collection.. is seen as 0 - * (any number)..
Thanks for any help,
Regards
Tony.

although this post is way old it could do with a decent answer.
some guidance can be taken from JSR26: UML Mapping for EJB
find it a www.jcp.org
also this research paper on consistency of reverse engineering between uml tools
http://citeseer.nj.nec.com/545406.html
Where Association is identified by looking at the types of all variables belonging >to a class (excluding method variables etc) and if the type of the variable is >non-primitive, than I have deduced it is an association relationship with that >class.
Would this be the right approach?Yes. You could also say that if it is a java.* type then it would also be an attribute.
Secondly I have noticed in JBuilder, it models dependency relationships by getting >all the Imports at the top of the java source file, is this right?? also I have >read that a dependency can be modelled by the variable types in operation >arguments (paremeterS ?)..JBuilder would be consistent with JSR26, and that's how i intend to implement in ArgoUml.
I would also appreciate if someone could clarify the difference betweeen >Composition and Aggregation for me and explain if it is possible to identify the >two relationships directly from java source code..Composition is a stronger form of ownership. the composed class is owned only by 1 class. Its lifetime is strongly linked to its owner - ie. it is not created before its owner and it is destroyed before its owner is.
eg. leg of a table.
Agregation is weak ownership. the owned class may be owned by several classes.
eg. a company is owned by many shareholders.
Last but not least, what about multiplicity ? am I right in thinking that an >instance variable is 0-1, an array declaration is seen as 0-n (fixed number) and a >Vector/ data collection.. is seen as 0 - * (any number)..sound right.
Alex

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Hungarian Naming Contentions for UML Class Diagram

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I am trying to combine Hungarian Naming Contentions with Java Naming Convention so variable name will follow x_y schema where x_ is according to Hungarian notation attached with class attribute, which is named according to java naming standard. This naming standard satisfies UML naming convention and will also help in java programming.
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Feedback Please

You're going to get a gozillion answers to this question, and all of them will be both right and wrong to some degree, so I will give you my thoroughly opinionated answer to go along with all the rest.
I am not a fan of Hungarian notation for one fairly fundamental reason. Java is a strongly typed language, thus it doesn't need indicators of type. By putting a type indicator on a variable you create potential problems when you change a data type. Won't happen? I am currently sweeping through a major portion of the application I'm working on changing data types for masses of variables because the database guys took a whim to change the data type in the database. If I were using Hungarian notation, not only would I have to change the type, the parameter type and return type for the accessor mutator methods, I'd also have to change the name, the name of the accessor and mutator methods, and anywhere that the variable is modified directly.
The name of a thing should speak for its self. It shouldn't need an indicator flag on the front to tell me what it is.
But you're talking about UML not Java code. The same thoughts apply. The name should speak for the thing it represents without the need for additional clarification.
Hungarian notation in my not so humble opinion adds complexity by requiring the development team to spend effort learning, understanding, thinking about, processing, manipulating, touching, dealing with what is essentially a thoroughly artificial naming scheme.
Just my thoughts on the subject. Your milage may of course vary wildly.

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Hi Shay
Unfortunately, I cannot view the suggested youtube stuff at work. (I'll try to view it when I get home)
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s

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It is true that conversion of class files to its java source codes is possible through some software. I want to know, is there any way to protect my java source codes from viewing or copying illegally by other persons ?
If I create JAR file from java files, can it be also convertible back to source codes ?
Avi

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http://www.retrologic.com/
http://www.2lkit.com/products/2LKitObf/
http://www.codingart.com/codeshield.html
http://www.drjava.de/obfuscator/

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Thanks Lisa. The problem really was with the poor instructions provided and a tired mind. There is no "context menu" ala right click on something BTW, right clicking on the main design page does not do any thing and right clicking a class only gives the properties. Anyway, what was meant, i think is to select Java from the main menu "model" and then select Generate/Java. Now since the code is "automatically generated", the Java option was grayed out and that threw me off.
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What version of JBuilder allows you to generate UML
Class Diagrams from the Java code? I was thinking of
downloading the free personal edition of JBuilder, but
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http://objectsource.com/blogs/2010/02/understanding-sun-idm-using-uml/
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playAgain() : bool
askBet() : int
Payout(amt: void) : void
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"void" and "bool" are return types.
public boolean playAgain()
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As for the void part, you don't need to return anything.
Code should look like:
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I use OS X10.5.5, NetBeans 6.1 and JSE 6 on a 64 bit mac.
When I downloaded NB6.1 it had JSE 5 as it's default (and only) java platform. I ran Software Update to get Java 6 from Apple, used the Java Prefrences utitlity to set JSE6 as default. In NB I added the JDK6 platform, registered the JDK6 javadocs and noticed that I also have the option of registering the Java source code.
I have three questions:
1) How do I make JDK6 the default in NetBeans. The JDK5 keeps being default after I did the steps above and I don't see anywhere to change that.
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By default, the IDE uses the version of the Java SE platform (JDK) with which the IDE runs as the default Java platform
for compilation, execution, and debugging. You can view your IDE's JDK version by choosing Help > About and clicking the
Detail tab. The JDK version is listed in the Java field.
You can run the IDE with a different JDK version by starting the IDE with the --jdkhome jdk-home-dir switch on the command line
or in your IDE-HOME/etc/netbeans.conf file. For more information, see IDE Startup Parameters.
In the IDE, you can register multiple Java platforms and attach Javadoc and source code to each platform. For example, if you
want to work with the new features introduced in JDK 5.0, you would either run the IDE on JDK 5.0 or register JDK 5.0 as a
platform and attach the source code and Javadoc to the platform.
In , you can switch the target JDK in the Project Properties dialog box. In , you have to set the target JDK in the Ant script itself,
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Choose Tools > Java Platforms from the main window.
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To set the default Java platform for a standard project:
Right-click the project's root node in the Projects window and choose Properties.
In the Project Properties dialog box, select the Libraries node in the left pane.
Choose the desired Java platform in the Java Platform combo box.
Switching the target JDK for a standard project does the following:
Offers the new target JDK's classes for code completion.
If available, displays the target JDK's source code and Javadoc documentation.
Uses the target JDK's executables (javac and java) to compile and execute your application.
Compiles your source code against the target JDK's libraries.
If you want to register additional Java platforms with the IDE, you can do so by clicking the Manage Platforms button.
Then click the Add Platform button and navigate to the desired platform.
To set the target Java platform for a free-form project:
In your Ant script, set the target JDK as desired in the javac, java, and javadoc tasks.
Right-click the project's root node in the Projects window and choose Properties.
In the Sources panel, set the level of JDK you want your application to be run on in the Source/Binary Format combo box.
When you access Javadoc or source code for JDK classes, the IDE searches the Java platforms registered in the
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See Also
Managing the Classpath
Declaring the Classpath in a Free-Form Project
Stepping Through Your Program
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Error in compiling java source code in a package

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am having a problem in compiling a java source code:
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i have included the directory path in the classpath....
still its not compiling .....
please help
thanks....

Assume the current directory structure:
C:\
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/Håkan

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I've searched through the folders named java but could not figure out which folder to open and how.

Hmmm, are you trying to view the Source Code for Abstractcollections and Abstractlist, or find it, or compile it, or what exactly?
Source code can be viewed in any text editor, but BBEdit, TextWrangler, & jEdit are really good...
http://www.barebones.com/products/bbedit/threeway.html
http://www.barebones.com/products/textwrangler/index.html
http://www.jedit.org/index.php?page=download

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How to protect the source code not to be pirated? This is a big problem about the mechanism of Java. Is there any tool to compile *.java to *.exe files? Or is there any tool that can decompile *.exe to *.java in the future?

This is a common question. If you do a search you will find many answers/solutions.
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Hi,
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Description
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Error description
!ENTRY org.eclipse.jdt.ui 4 2 2015-07-27 18:57:09.196
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Trouble with UML class diagram...

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