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BlueJ is an IDE designed for beginners. It has a built-in editor, debugger, and viewer. An editor
provides us an area to write programs, and a debugger helps us by identifying errors in the
programs. On the other hand, the viewer shows the output of the program.
BlueJ is a freely downloadable application. We can download it from https://www.bluej.org/.
After downloading the application, we need to install it on our computer.
INTERFACE OF BLUEJ
After installing the BlueJ IDE, double-click on the BlueJ application shortcut icon on the
Desktop. The BlueJ application window appears. The BlueJ application window has the following
components:
Title Bar
Menu Bar
New Class
Button
Compile
Button
Project Icon
Object Bench
BlueJ Application Window
The BlueJ application window has several important parts:
Title Bar: It is located at the top of the window. It displays the application and the project name.
Menu Bar: It contains five menus that allow us to create a new project, open an existing
project, create a new class, compile a program, and get help with BlueJ.
New Class Button: It allows us to create a new class.
Project Icon: It allows us to work on the current project.
Compile Button: It allows us to compile all the uncompiled classes.
Object Bench: It is the area located at the bottom of the BlueJ
application window that allows interaction between objects.
CREATING FIRST PROJECT USING BLUEJ
To create a project using BlueJ, follow these steps:
Step 1 Click on the Project menu from the Menu bar. A drop-down list
appears.
Step 2 Select the New Project option.
Creating New Project
52 iPRIME (Ver. 2.2)–VIII

