The development of BlueJ was started in ________.
Answers
Answer:
1999
Explanation:
Hope you understand
Answer:
The development of BlueJ was started in 1999 by Michael Kölling and John Rosenberg at Monash University, as a successor to the Blue system. BlueJ is an IDE (Integrated Development Environment).
Explanation:
BlueJ is an integrated development environment for Java. It was created for teaching Object Oriented programming to computer science students. It provides a simple beginner friendly interface to develop Java programs in an interactive visual environment. You can read more about BlueJ here.
BlueJ Main Window
This is the BlueJ main window. This is how it will look when you open it for the first time. In subsequent launches, it will open the project that you were working on previously.
Create a new BlueJ project
You start by creating a new project in BlueJ. A project is a collection of Java classes that constituent your software application. So, if you are building a student’s marks management application to record the marks of all the students in your class, that will be one project. While at the same time if you are building a cool game using Java then that will be a separate project.
To create a project, you go to the project menu and select new project. The new project dialog pops up. Give the name of the project as FirstJavaProgram. For location, navigate to the folder where you want to save your project. I will save it in C:\KnowledgeBoat\CompApps\BlueJ. Click on Select Folder then click on OK. BlueJ has created our FirstJavaProgram project. The name of the project is shown in the title bar.
Let’s go to the location we specified for our project.
BlueJ Project Location to explain ICSE Computer Applications
Here you can see that a folder with our project’s name is created. This folder represents our FirstJavaProgram BlueJ project. Let’s open this folder.
BlueJ Project Folder
The package.bluej file is the project file. It contains information related to the project and is used by BlueJ. The other file README.TXT is a text file provided by BlueJ to add documentation for our project.
BlueJ provides a handy way to work with the readme file. This icon here represents the ReadMe file that we saw just now in the project folder. You can open it by double clicking on it. Here you can add the details and additional notes about your project like project title, purpose of project, etc. This is just a template provided by BlueJ to help us document our project. You can change the contents of this ReadMe in any way you want.
Add a new class to the project
For adding a new class either you can click the New Class button, or you can go to the edit menu and select new class. This opens the new class dialog. Enter the name of your class. Remember we named our class HelloJava in our first program. I will enter the same name here. Select language as Java, class type as class and hit ok. Our newly created class is added to our project. Let’s switch to the folder containing our project.
BlueJ Project Files
HelloJava.java file contains the source code of our HelloJava class. Java compiler requires that a source file should use .java filename extension.