DrJava is a lightweight development environment for writing Java programs. It is designed primarily for students, providing an intuitive interface and the ability to interactively evaluate Java code. It also includes powerful features for more advanced users. In this article, we will show you how to download and install DrJava on Windows.
To download DrJava, go to http://www.drjava.org/download.shtml and click on the button that says \"Download Windows App via HTTP\". This will take you to a page where you can choose a mirror site to download the file from. Click on any of the icons in the \"Download\" column to start the download.
The file name should be something like drjava-beta-2019-220051.exe. Save it to a location where you can easily find it, such as your desktop or downloads folder.
Step 2: Install DrJava
To install DrJava, double-click on the downloaded file and follow the instructions on the screen. You may need to allow the program to make changes to your device. Choose a destination folder for DrJava and click \"Next\". You can also create a shortcut for DrJava on your desktop or start menu if you wish. Click \"Finish\" when the installation is complete.
Step 3: Run DrJava
To run DrJava, you can either double-click on the shortcut you created or go to the destination folder and double-click on the drjava.jar file. You should see a window like this:
Congratulations! You have successfully downloaded and installed DrJava on Windows. You can now start writing and running Java programs using DrJava.Step 4: Write a Java Program in DrJava
To write a Java program in DrJava, you can use the \"Definitions\" pane on the left side of the window. This is where you can type your Java code and save it as a file. To create a new file, go to \"File\" and then \"New\". You can also open an existing file by going to \"File\" and then \"Open\".
As an example, let's write a simple program that prints \"Hello, world!\" to the console. Type the following code in the \"Definitions\" pane:
public class HelloWorld
public static void main(String args)
To save your file, go to \"File\" and then \"Save\". You can name your file anything you want, but it should have the same name as the class name and end with .java. For example, you can name your file HelloWorld.java.
Step 5: Compile and Run a Java Program in DrJava
To compile and run a Java program in DrJava, you can use the buttons on the toolbar or the menu options. To compile your program, click on the button that looks like a hammer or go to \"Tools\" and then \"Compile Current Document\". You should see a message saying \"Compilation completed.\" in the \"Compiler Output\" pane at the bottom of the window.
To run your program, click on the button that looks like a green triangle or go to \"Tools\" and then \"Run Document's Main Method\". You should see the output of your program in the \"Interactions\" pane on the right side of the window. For example, you should see something like this:
Welcome to DrJava. Working directory is C:\\Users\\user\\Documents
> run HelloWorld
Congratulations! You have successfully written, compiled and run a Java program in DrJava. 06063cd7f5