VisuObject
Open VisuObject

Free · no sign-up · for advanced classes

Object-oriented programming. With class diagrams and Java.

With VisuObject you write Java classes in a project like in Eclipse, and the UML class diagram draws itself alongside. Change the diagram and the code changes. Then create objects, run the program and watch it in the debugger.

Start VisuObject in the browser Learn the basics in VisuStruct first

Runs in the browser on computers and tablets. Your projects stay in your workspace folder.

How it works

Three steps from a class to a running program

  1. Java code on the left, the matching class diagram on the right

    Draw

    Write classes in Java or draw them in the class diagram. Both always stay the same.

  2. Object diagram with an owner and two dogs

    Create objects

    In the object diagram you create objects, give them values and connect them.

  3. The debugger stops at line 11, the object diagram shows the team and its players

    Run and debug

    Run executes your project with real Java. In the debugger you go step by step and see the objects live.

Features

Everything for teaching OOP

Class diagram, objects and Java in one place, close to Eclipse and Astah.

Class diagram like Astah

Draw classes, interfaces, association, aggregation, composition, inheritance and realization, plus notes.

Projects like Eclipse

Package Explorer with project, src folder and packages, a New menu for classes and interfaces.

Object inspector

Edit class, attributes and methods in tables. Generate a constructor, getters, setters and toString().

Object diagram

Create objects with names and values and see which object points to which.

Real Java

Run compiles all classes with real Java. Output appears in the console, Swing windows too.

Debugger

Set breakpoints, step over, into and out. Call stack and variables always in view.

Object inspector

Edit classes without typing every line

Click a class in the diagram. In the object inspector you change its name, superclass and interfaces, add attributes and methods and generate a constructor, getters and setters. VisuObject writes the Java code exactly where it belongs.

  • Visibility, type, static, final and initial value for every attribute
  • Methods with parameters, return type and abstract
  • Suggestions after the dot for your own classes
  • VisuObject detects «create» and «use» dependencies by itself
Open VisuObject
Object inspector with the attributes of the class Tier
VisuStruct

Before

VisuStruct: the basics first

Before you start with classes, VisuStruct teaches variables, branches, loops and methods with structograms. VisuObject builds on that. You can switch at any time in the gear menu.

  • Lessons and exercises on structograms
  • Simulation with variables and output
  • Java, Python and JavaScript from the structogram
Go to the VisuStruct home page
The VisuStruct learning area next to the editor

Model first, then program

Plan your classes in the diagram, write the code and see in the object diagram what happens when it runs.

Try it now