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Your first program with JBuilder
at Home

You may want to print out these instructions to use as a guide
until you become more familiar with JBuilder.

  1. By now, you should have created a folder on your C drive called  MyJavaProjects.

    For your first demo program in JBuilder, you will need to add a file to this new MyJavaProjects folder.  Right click on the file below and save it in the folder MyJavaProjects as   C:/MyJavaProjects/

    Now, let's make our first project.  Remember:  It is necessary to create a project for every program you write in JBuilder.

  2. Access the JBuilder software and have it open on the screen.


  3. Click on File on the menu bar and then click on New Project.
    Next to Name: type LabDemo
    Notice the line next to Directory: C:/MyJavaProjects/LabDemo will automatically appear.

If you have your path default settings in place, you can just click Finish. 
If you need to set default paths, cancel, and go to Setting Up JBuilder.

     4.   To add a pre-existing .java file to the project, right click on LabDemo.jpx (as it  appears in the area to the left), choose Add Files/Packages ( or the green + ), find the files you wish to add and choose them.  For this example, add the file that you downloaded to your project file,  Click OK
          You should see the addition of the file on the left side of the screen under LabDemo.jpx.
Double click on to see the source code appear in the window on the right.

Notice:  The project name (LabDemo) and the name ( are different.  Also notice that the name and the "public class Multiply" (in the program) display the same.

Remember:  The project name and the name must be DIFFERENT. 
Do NOT give the project the same name as your program!!!


    5.  Click on Project in the main menu and choose Make Project, the first line. The words "Build Successful" will appear on the bottom left of this same screen.

    6.  Click on Run in the main menu and choose the first line Run Project. The following  window will appear waiting for you to tell the project which file contains "main".  (This can  also be set under Project /Project Properties.)  

     7.  Click on the ellipsis (...) after the label "Main class."  You must select the file that has the main method. In this example, the main ( ) is in MultiplyIf you cannot find your file, type in the name of the file.  It is not necessary to fill in VM parameters or Application Parameters.

     8.  Click on OK and the program will run. You will be asked to input the first integer. Click  on the space after the word integer and type in an integer, press enter.  You will be asked to input the second integer. After typing in a second integer, press enter.  You  will be asked to input the product.  Enter an integer.  Practice running the program for several inputs.

     9.  To be able to print or save your output, highlight the bottom of the screen by dragging the mouse over it, right click and choose "Copy Content".  Then access Notepad, ( under Start/Programs/Accessories), and choose edit and click on paste. You may then save it as  C:/MyJavaProjects/LabDemoOutput (or something similar).

    10.  To save and terminate the session, in the main menu, click on File and then click on Close Projects. Click on All for the following window. And then click on OK.   To clear the display window at the bottom of the screen, right click in that area and choose Clear All.



     11.  To create your own .java file:  Choose FILE/NewClass and the following window will appear.  Remove the Package name if one appears.  Enter the name of your .java file (which is also the name of your class).  Check only Public and Generate main method.

When the working screen appears, be sure to insert your documentation and your imports.


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