Table of Contents

Preliminaries
Starting DrJava
Creating a simple application
Printing your source
Printing your output
Exiting and reentering
Adding a user-defined package to your project

Preliminaries:

Starting DrJava:

• Click on the Windows START button at the bottom left hand corner of the display.
• Move mouse to Programs->DrJava->DrJava
• The DrJava window should appear.

• Double click on the DrJava icon on the desktop, which looks like:
• The DrJava window should appear.

Creating a simple application

• On the toolbar, click the New button (it will be on the upper left just under the File menu).





• Now create a HelloWorld class. In the Definitions pane (the big empty space), type the following:

  public class HelloWorld {
    public static void main(String[] args) {
      System.out.println("Hello world, my name is LASTNAME");
    }
  }
  

  
  
  
  
  

• Save the program by clicking the Save button on the toolbar. If you are working in a Computer Science lab, save the file in a folder named Z:\working\java. If you are working in a teaching lab, use C:\cs1063\YOURNAME as the folder and later transfer your project to a floppy or USB drive. At home, you can put it anywhere you like.
• Compile the program by clicking the Compile button on the toolbar. If you made any mistakes, the error will be displayed in the Compiler Output pane on the bottom. Fix your mistakes and try to compile your program again.
• If there are no mistakes, run the program by clicking the Run button on the toolbar. You should see:
  
  
  
  

Printing your source:

Printing your output:

• Click the Console tab on the bottom pane. Right click on the Console pane on the bottom and select Print Console...

Exiting and reentering:

• Be sure to save your application before exiting. There is a Save All item in the File menu that you can use to do this.
• To close all your file, select Close All on the File menu.
• Select Exit on the File menu to exit.

When you re-enter DrJava, you can get a previous file through the Open button on the toolbar. Alternatively you can open a project through the Project menu.

Adding a user-defined package to DrJava:

• <Step 1:> Add the package to DrJava:
  • From the Edit menu, select Preferences
  • Click Resource Locations tab
  • Click Add
  • Find and select the actual .jar file or directory that you want to add.

• <Step 2:> Add the appropriate import statement: Add the appropriate line at the top of the file. For example, to use the Keyboard class in the cs1.jar library, add:

      import cs1.*;
  

  You can then use the Keyboard class.