Unified Modeling Language (UML) Editor

A UML class diagram can be used to express the structure of a system by showing the relationship among objects. And a UML editor is a tool to make drawing a UML class diagram efficiently.

Table of Contents

• Introduction
• Technologies
• Setup
• Features
• Class Diagram

Introduction

A UML Editor is in the window which is composed of a Menu bar on the top, a list of Buttons on the left, and a Canvas on the rest of the window.

• Buttons: six buttons from top to bottom is select, association line, generalization line, composition line, class object, and use case object
• Menu bar: other features in the Edit menu included group objects, ungroup object and change the object’s name
• Canvas: a place for drawing objects and lines
• Other definition
  • basic object: class object or use case object
  • object: composite object or basic object
  • composite object: grouped objects
  • line: association line, generalization line, or composition line

Technologies

• OpenJDK 15.0.2

Setup

# change directory to src 
$ cd src

# generate and store the compiled class files in directory output
$ javac gui/Main.java -d output

# change directory to output
$ cd output

# excecute
$ java gui/Main

Features

• Create basic object mode
  • Create a UML basic object
    • click on a Basic object button
    • click on the canvas to create a basic object
• Create line mode
  • Create a UML connection line
    • click on a Line button
    • press one basic object
    • drag continuously to another basic object and release
    • create a connection line from the first basic object to the second one
• Select mode
  • Select a single object
    • click on Select button
    • click on a single object
  • Select a group of objects
    • click on Select button
    • press a point that contains no objects
    • drag continuously to another point and release
    • the selected area where contains specific objects
  • Unselect a single object or a group of objects
    • click on Select button
    • click on a place where contains no objects
  • Group objects into a composite object
    • click on Select button
    • select a group of objects
    • click on Group objects in the Edit menu
  • Ungroup a composite object back to objects
    • click on Select button
    • select a composite object
    • click on Ungroup objects in the Edit menu
  • Move object
    • click on Select button
    • press one object or a group of objects
    • drag continuously to another point and release on where the object you want object/objects to be
    • automatically remove all connection lines which connected with the object
  • Change object name
    • click on Select button
    • select a single basic object
    • click on the Change object name in the Edit menu
    • enter a new name for the basic object

Class Diagram