hope you learn and experience UML with using JUDE that
is a modeling tool that you can draw UML with. I will
guide you how to use JUDE through drawing UML with examples.
Grab your mouse and draw UML with reading this through.
I hope you enjoy experiencing UML with me.
1-2. UML and UML tools
When you draw UML, do you draw it by hand or do you
use a tool? Experience the advantages of using a tool.
Why a tool? Here are just a few of the many advantages
- Allows you to draw clean diagrams
- It draws elements in their appropriate sizes
- It is easy to share or exchange UML models with
- You can use Undo/Redo over and over to try and figure
out what you really want
- It gives you an alert when you draw diagrams against
the UML specification
- Data can be inputted in several ways (Graphs, tree
- Data is easily reusable
- You can manage all data and references between them
If you are a beginner in UML, you will find that #4
and #5 very helpful for you. Because mistakes can easily
be "Undone" so you can make the perfect UML
diagrams. Also, when you are creating an abstract class
out of a class, the abstract class name will be automatically
shown in Italic as the way it is supposed to be in the
specification. There is so much more that you can get
an advantage of by using JUDE to draw UMLs. JUDE will
become your UML tutor. Just try playing around with
it. And remember, if you ever make a mistake, you can
always do "Undo" it and try again.
1-3. Description of
There are many UML tools that you can use these days.
The one I prefer is "JUDE/Community" (JUDE
stands for Java and UML Developer's Environment). I
am a little bias, I am a member of JUDE Development
Team and have been developing and perfecting JUDE over
the years. I want more people to try JUDE and learn
to love it like I do.
There are two versions of JUDE; JUDE/Community (Free
version) and JUDE/Professional (Product version). JUDE
has following features :
- JUDE/Community supports all basic UML 1.4 diagrams
- JUDE/Professional supports all basic UML 1.4 diagrams,
some UML 2.0 specifications and Entity-Relationship
diagrams (ER diagrams are supported since JUDE/Professional
- Unlimited UNDO/REDO feature
- Drag scrolling, changing view freely using "Map
View" to make it easy to edit large scale of
- Import and export of Java source files
- Automatic generation of class diagrams with model
For more information about features of JUDE, please
1-4. Installation of
Now let's install JUDE. You will need to first install
Java Environment to run JUDE, so install Java Environment.
It is very easy to install both of them.
1-4-1 System Requirement
Windows 2000, XP, Vista
Pentium III 600MHz or higher
256MB or more
J2SE 1.4.1_07 or later OR J2SE 1.4.2_05 or later
(JDK 5.0 is supported since JUDE/Community 3.1)
JUDE works on J2SE Environment such as Windows98, Linux
and MacOS. However we have not tested them enough to
support those environments officially. So I recommend
installing JUDE on WIndows. If you need information
about how to set up on other environments except Windows,
please refer to this
1-4-2 Install Java Environment
If you already have installed required version of Java
environment on your machine, skip this step and go next.
If you haven't, please go on Sun Microsystems page and
install Java Environment by following procedure on its
page. Please read following notes before you install
- Please make sure to install required version of
Java environment. JUDE might not work properly on
non-supported versions of Java.
- Please make sure that J2RE is included when you
install J2SE. (JUDE would use J2RE by default that
is installed into OS)
1-4-3 Download JUDE
Next download JUDE From
Select the latest version of jude-community-x_x-setup.exe
(approximately 5MB) and download it. (By the way, I
used JUDE/Community 3.2 to write this article.)
1-4-4 Install JUDE
After the download finnishes, double click on the file
to start installing JUDE. After double clicking on it,
the installer wizard will launch and all you have to
do is to specify the place to install it.
If you are on Windows98 orME, you will have to open
the file called jude.bat with an editor then set the
absolute path of the folder in JUDE/HOME variables.
The jude.bat file is located in JUDE install folder.
1-4-5 Run JUDE
Launch JUDE from Windows Start Menu. This image will
be shown when you start JUDE.
（The image of JUDE starting）
1-5. Fundamental Components
and Basic Operation of JUDE
Now I will show you screen contents of JUDE and guide
you some basic operations.
1-5-1 Fundamental Components
- Management View
The management View has the Main Menu that includes
functions related to the whole project, such as file
operation and editing and the Tool Bar for frequently
- Diagram Editor
The Diagram Editor is used to edit diagrams and models.
You are able to open multiple diagrams at the same
- Structure Tree
It displays models in a tree structure. You can carry
out various operations using the Pop-Up menu of model
elements on here.
- Inheritance Tree
The Inheritance Tree View displays models in a tree
structure based on the inheritance relationships between
- Map View
The Map View provides an overview of the diagram that
is opened in the Diagram Editor. The area displayed
in the Diagram Editor can be specified by a right-drag
and the diagram in the Diagram Editor can be scrolled
by a left-drag. This function is very useful for big
- Property View
The Property View is used to display and edit the
properties of model elements.
1-5-2 Create a new project
In JUDE, UML data will be saved as (Name).jude. These
files are called project files. There is no project
opened when launching JUDE ata the first time. Okay,
now let's create a new project. Select [File] - [New]
from Main Menu. The Structure Tree and Property View
will be displayed once you create a new file.
"UseCase diagram" and "Class diagram"
are created in a new project with "no_title".
"no title" package is associated with Java
default package. However we are not going to use an
Export Java feature in this tutorial, so let's carry
on. Java package is associated with Java platform API
and it holds basic classes such as "String"
and "Vector"..etc. These classes can be used
as types of Attributes.
1-5-3 Create Packages and Diagrams
To create a new package, Pop-Up menu in the Structure
Tree is mostly used. To create a new diagram, select
[Create Diagram] from Pop-Up menu in the Structure Tree
or select from [Diagram] in Main Menu.
Diagrams that you can create with JUDE/Community(3.2)
- Class diagram
- UseCase diagram
- Statechart diagram
- Activity diagram
- Sequence diagram
- Collaboration diagram
- Component diagram
- Deployment diagram
Object, Package, Robustness diagrams are also supported.
1-5-4 How to create and edit items
The basic operation to draw diagrams with a tool is
almost the same in general drawing tools. If you have
never used drawing software and have no experience with
them, you will have to get used to it, so let's get
1-6 UML about Bowling
Now all is set up and we area ready to draw diagrams.
What diagrams should we draw? Have you gone bowling
lately? I myself enjoy the bowling competition our company
held the other day. I guess the most people have bowled.
So let's use the bowling for the subject for UML this
time. Let's draw UML of the system to show the bowling
Here are the requests.
Our purpose here is to try experiencing UML using UML
modeling tool. It is not important to draw the perfect
diagrams. Then let's get it started. Are you ready?
- Show the track of a bowling score once the game
- Update the score every time the player throws the
- Players can change the scores during the game.
- Show an animation when someone made the strike.
1-7 Draw a UseCase
Now let's start drawing diagrams, we are going to start
with a UseCase diagram. We are going to draw a diagram
like this figure below.
Open a UseCase diagram that comes with the default
project file. Right-click on the UseCase diagram in
the Structure View then select [Open Diagram] in Pop-Up
menu or double-click on it to open UseCase diagram in
the Diagram Editor.
In the Diagram Editor, there is a Tool Palette with
buttons to edit diagrams.
Place the mouse pointer over the button if you want
to know what the button is for, a Tooltip will show
the description of the button. On the Diagram Editor,
you will draw diagrams switching modes with using these
buttons. For example when you move elements on the Diagram
Editor, turn the [select mode] on then select the elements
you want to move then you can move them. If you want
to create the certain element continuously, switch the
mode to [Lock Selected Mode]...etc.
|Select Mode. During this mode
is on, you can select, edit, move and change size
|Lock Selected Mode. It enables
you to craete the selected element continuously.
For example if you create an Actor without the
Lock Select Mode on, once you add an Actor on
the Diagram Editor, you will have to select the
Actor again to create another Actor. However with
the Lock Select Mode on, the focus stays on Actor
and you can create more than one Actor continuously
without selecting an Actor again on the tool palette.
|Set Relation End to the center
of the item. It places the ends of lines. (e.g.
Associations, Generalizations, or Dependencies)
at the center of Model Elements.
Select an Actor button on tool palatte, then click
on anywhere in the Diagram Editor to create one. Enter
"Player" for the name of this Actor.
Now let's create three UseCases just like the way you
created the Actor.
You can move elements by dragging them, and when you
want to rename them, just double-click on the name of
Now let's draw a line between the Actor and three UseCases.
Each line has its own meanings. Now what we need here
is a line called Association. Select an Association
button on tool palette. To create an Association, you
have to click twice, first click on the begenning target
and another on the end target. First, click on the "Player"
Actor, then click on the "Start the Game"
UseCase. Now an association line is drawn between the
"Player" Actor and "Start the Game"
UseCase. Then create two more associations just like
you did. Now add a rectangle and put a text "Bowling
Score System" in it to complete the diagram!
Tips： Cancellation during
If you clicked on the wrong
target by mistake while you were going to
draw an association line, press [ESC] key
or right-click to redo it. It works for any
lines between two elements such as : Generalizations,
Realizations and Dependencies.
You might have noticed that
UseCases and an Actor were added in the Structure
Tree when you created them in the Diagram
Editor. Also the properties of the items that
are selected in either the Diagram Editor
or the Structure Tree are shown in the bottom
left pane called Property View. You can modify
data in several fields; in the Diagram Editor,
Structure Tree, Property View where ever it
works the best for you depending on case.
Let's use the Property View
and change the name of this UseCase diagram.
Select the "UseCase Diagram" in
the Structure Tree, so the property of the
UseCase diagram will be shown in the Property
View. The name it to "Bowling UseCase
Diagram" and press [Enter] key to complete.
Tips： Deleting elements
To delete Actors or UseCases,
select [Delete from Model] or [Delete from
Diagram] from their Pop-Up menu. The reason
that there are two ways to delete elements
is because elements like Actors and UseCases
can be shared with other diagrams and also
used in other diagrams.
[Delete from Diagram]
|It deletes target
elements only from the focused diagram.
The model stays in the Project file.
[Delete from Model]
|It deletes the target
elements from all diagram completely.
Tips： Zooming and Scrolling
I will introduce you to features
JUDE used for viewing operations. The UseCase
diagram we just drew was small scale so there
was no need to used the feature for the view.
Although when you handle large-scale diagrams,
you will have ato focus on some parts of the
diagram to modify it. And JUDE has a feature
that makes the operation very easy. The displayed
area can be specified by a right-drag in the
Diagram Editor in JUDE. It enables you to
move the diagram diagonally. To zoom in or
zoom out, select [View] menu from Main Menu
or use the Tool bar. Also to specify the area
to display you want to see, you can use Map
View in the Project View. (The top left pane).
Tips： Undo and Redo
JUDE has conservative Undo
and Redo features lets you revert back 100
times! If you have not used Undo so far, try
and see how it works! So there is no need
to worry about making mistakes at all when
drawing diagrams. What a relief!
1-8 Draw an Activity
Now let's focus on the "Display the Score"
UseCase and draw the flow of it on an Activity diagram.
First, you have to add an Activity diagram to your project
file. Select the UseCase of "Displaya the Score"
then select [Create Diagram] - [Add Activity Diagram]
on its Pop-Up menu. A new Activity diagram will be added
and opened in the Diagram Editor.
Name the Activity diagram "Behavior of displaying
Scores" just how you changed the name of UseCase
Activity diagarm has following buttons in its Tool
Now let's draw an Activity diagram just this below
Activity diagrams are very similar to FlowChart diagrams
and they describe how things flow and connect to next
In this Activity diagram, it describes how things go
and act after the player throws a ball and how the score
gets displayed after that. From this Activity diagram,
you can get the information that an animation will be
shown when someone made a strike.
Let's start creating all elements except arrows. You
can create them the same way you created an Actor and
UseCases. Just select elements you want to add from
the tool palette then drop them on the Diagram Editor.
You can edit the EntryAction that is an action to set
in ActionState in either the Diagram Editor or the Property
The text of "Calculate numbers of knocked out
pins" is rather long to have it all in one line
inside the ActionState. So let's change the size of
this ActionState and also let this name line break down.
To change the size of elements, select one of corners
of the element and drag it.
Now let's add arrows between elements to show the
flow of these action objects. This arrow is called
Transition. To draw a Transition, you will have to
click two targets to connect as how you did to draw
Association lines in the UseCase diagram, but you
have to be careful because the arrow is created by
the order you click. I will show you how to create
Tips： How to create items
- Method 1 : Turn the [Selected
Mode] on Tool Palette. (The second button
from the right.)
- Method 2 : Keep pressing
[Shift] key down while creating elements
So how are you doing so far?
Could you create items continuously?
It is very useful and easy when you get used
[Strike] is a guard of Transition.
So click on the Transition arrow then enter
"Strike" in Guard column in the
I will introduce three tips
for how to make clean diagrams.
Tips： Multiple selection
There are three ways to select
multiple items on the Diagram Editor.
- Method 1 : Drag and make
a rectangle over elements. All elements
included in the rectangle will be selected.
- Method 2 : Select [Select
All] from the Pop-up menu on the diagram.
- Method 3 : Keep [Shif]
key down during selecting multiple items.
Elements can be aligned in
horizontally and vertically in JUDE. Let's
use [Align vertical center] for items on the
left (All items except "Show an animation").
It will make the diagram look tidy. Draw a
rectangle including all left target items
inside of it to select them. Then select [Alignment]
- [Align Vertically] - [Align Vertical Center]
from Main Menu or you could do it by selecting
the icon on Tool Bar down below the Main Menu.
Tips： Line Styles
There are two types of lines
Normal Line Style (Default):
|Connect diagram elements
with straight or polygonal lines
Right Angle Line Style:
|Connect diagram elements
with a right-angle line
The default of line style
is set to [Normal Line Stile]. However [Right
Angle Line Style] can look good sometimes.
So why don't we use [Right Angle Line Style]
for this Activity diagram. Select all lines
then select [Line Style] - [Normal] on its
Pop-Up Menu or select the icon on Tool Bar.
1-9 Draw a Class Diagram
Now we are going to draw a Class diagram. Class diagrams
and Sequence diagrams are frequently used diagrams in
UML, so we are going to take much more time here than
other diagrams we have drawn.
This Class diagram is an analytic diagram focused on
Bowling Game and its scores. This Class diagram describes
that a bowling game consists of a sequence of ten frames
and each frame consistes two throws except the last
frame that consists three throws. First, change the
name of the default Class diagram to "Analysis
There are below buttons in Class diagram's tool palatte.
Well, let's start drawing the outline first, then do
details later. Create six classes. You can create them
just how you created an Actor and UseCases.
The arrows that are coming from the bottom two classes
are called "Generalization". When creating
Generalizations, click on the start target first.
All relationship in the above Class diagram figure
that we are going to draw except Generations and the
dotted line are called Associations that you have already
drawn in UseCase diagram. Let's draw these Association
lines now. The type of Association between "Game"
class and "Frame" class are called "Composition".
With this composition association, this means that the
game consists of the frames and if there were no frames,
there will be no game.
How to set the Property of Association
Association has several properties to set such as Aggregation,
Composition, Multiplicity..etc. In this case, you need
to set the Composition to the Game class.
- Method 1 : Use Dropdown list of Association on
- Method 2 : Set it on the Pop-up menu of the Association
- Method 3 : Set it on the Property View of the
At this time, why don't you set the Composition with
Method 2, from the Pop-up menu.
Even though you select the same association to open
a Pop-up menu of it, you could get different menus
in the Pop-up menu depending on where you click on
it. Try to click on the association line where it
is closed to the Game class. Then you can set the
property for the Game class.
Now let's set the Multiplicity from the Property
View. When selecting the Association in the Diagram
Editor, the property of the Association will be shown
in the Property View (See the below figure) then you
can modify the Multiplicity.
You have to be careful when you set the multiplicity
because there are two role tabs shown for two different
targets of the association. So make sure that you
have chosen the right one. In this case, choose the
tab that has "Frame" for Traget, then set
the multiplicity to 10.
Now we are going to add Attributes and Operations
to the classes.
Add Attributes to Classes
Now we are going to add three Attributes to the "Frame"
Class. There are three ways to do that.
- Method 1 : Using the Pop-up menu on the Diagram
- Method 2 : Using the Pop-Up menu in the Project
- Method 3 : Using the Property View of the class
Select the "Frame" class on the Diagram
Editor and select [Add Attribute] on its Pop-up menu.
Then type "Pin numbers on 1st throw" as
the Attribute name. Then add more other attributes.
You should try adding them using other two methods
shown above for practice. If you want to delete attributes,
you can delete them from the Property View or the
Structure Tree. The default of Visibility is private,
and the default of Type is set to void. To change
those default setting, use the Property View. Also
Attributes can be added by using Shortcut Key "Ctrl
+ F". (Shortcut key for adding operations is
Ctrl + M).
Add Operations to Classes
You can add and edit Operations to class just exact
the same way how you do to Attributes. Why don't you
add Operations to classes from the Property View.
To add Operations on the Property View, press [Add]
button. To edit information of added operations, use
this property view or select added operation and press
[Edit] button to have more detailed property view.
You can edit all detailed information such as Parameters
in this Operation Property dialog. Press [Delete]
button when you want to delete the selected operation.
[Edit] button is for when you want to open an Operation
Propety Dialog. [Up] and [Down] buttons will rearrange
the order of operations. Okay, after you completed
adding the operations of "Calculate knocked down
pins", add a parameter "Pin numbers : int"
using the Operation Property.
How are you doing so far? The main purpose of all
of this is drawing UML diagrams using JUDE, so do
not worry about technical details and just keep moving
1-10 Draw a Sequence
Now we are going to draw a Sequence diagram that displays
the time sequence of the "Calculate knocked down
pin numbers" object that Game class consists. Sequence
diagrams can be added under the UseCase or Operations
in the Structure Tree. Select the Operation of "Calculate
knocked down pin numbers" then select [Add Sequence
diagram] on its Pop-up menu.
This diagram describes the time sequence of each actions
that are participated in the interaction that when "Player"
throws the ball, "Ball Throw Checker" object
recognizes it then registers the numbers of knocked
down pins to "Game" object, then if it was
a strike , the "Display the Score" object
shows an animation. We have drawn an Activity diagram
just looks like this but there is a diffrence. In Sequence
diagrams, it displays those in the time sequence and
consists of the vertical dimension (time) and horizontal
dimension (different objects.).
Sequence Diagram's Toolpalatte
These buttons on Tool Palette in Sequence diagram look
a bit different compared to other buttons we have seen
in other diagrams. So its different to operate elements
too than we have done in other diagrams.
First, create five objects you see on the top. But
don't rush it out. Because I want to tell you something.
We can create objects by choosing the object buttons
from the Tool palette just like we always have done
but there is much convenient way to create these objects
in Sequence diagram. Use the Structure Tree! This is
how you do it. Select the base class in the Structure
Tree then drag and drop it onto the Sequence diagram
in the Diagram Editor.
Creating Objects by dragging
You can also select multiple classes in the Structure
Tree then drag them and drop onto Diagram Editor at
Now we are going to create messages. The message from
"Player" to "Ball Throw Checker"
object is an asynchronous message. Select the forth
button from the left on the Tool Palette. Then click
on the lifeline of "Player" and click on "Ball
Checker" the next, the message is drawn! Now double
click on the name message0 and change it to "Throw".
Now create a message "1.1 Count number of knocked
down pins" just like how you just made the "Throw"
message. After you finish, let's create a Synchronous
message that is send out from the "Ball Throw Checker"
sending it to itself. (It is called a SelfMessage).
Select the third button from the left on Tool Palette.
When you created an asynchronous message, you clicked
on Lifelines. But click on the Activations when you
create Synchronous messages.
Creating a Selfmessage
Relating Operations to Messages
Messages can be related to the operations. For example,
when an Operation's name has changed in Class diagram,
the message can be changed to the same automatically
if the operation was related to the message. To make
a relation between operations and messages, go to the
Property view while selecting the Message then set the
Operation in Operation column. So now make a relation
between "Calculate numbers of knocked out pins"
message and the operation you jsut created.
Create a relation between Operation and Message
If some operations have been already related to the
"Ball Throw Checker" Class which is a base
class of the message sender, those operations will
be shown in the Operation column. If there is no operation
related yet to any messages, you can add a target
operations by pressing [New] in the Property View.
Pressing [Property] button will show you the property
of selected operation, so you can change the name
of parameters of it. You don't have to have operations
related to messages always, however just keep it in
your head that it makes it easier to keep the compliance
with other diagrams if you have made relations between
operations and messages.
Now, create other messages.
Tips： Activation Size
You might have noticed that
he size of Activations get longer every time
the new messages are added or get moved. It
is because that the source activation needs
to be longer than target activatins that receive
messages from the source activation in UML specification.
So JUDE automatically adjusts it every time
you make new messages. JUDE does adjust the
size of Activations to make them grow but doesn't
make them shorter. You can make them shorter
by yourself if you want to. You can change the
size of Activations with the same way you resized
the ActionState in Activity diagrams. Select
the Activation then drag the little box shown
on the corner to resize it. It works for all
activations of messages except for Asynchronous
1-11 Other Diagrams
Here are figures of Collaboration diagram and StateChart
diagram of Bowling.
This Collaboration diagram expresses
the mutual action that you drew on Sequence diagram.
Collaboration Tool palatte
Click on the link when creating messages.
This StateChart diagram is drawn the Chart of how
the game goes.
StateChart Tool palatte
1-12 Features of JUDE
JUDE has much more features that is not introduced
on this page. Try these following features.
- Export of Java Shelton Code
- Import of Java Source Files
- Template Generation of Java Source Files
- Model replacement by dragging in Structure Tree
- Icon Notation of Boundary、Control、Entity Classes
- Set the default color for items
- Set the default color for stereotypes
It is possible in JUDE System Properties.
- Changing the Associatio targets by draggin the corner
of Association lines
Just by dragging the line end to other items, you
can change the targets.
- Paste images on Microsoft Office(Rasta)
- Import JUDE Model