How to use JUDO

To use JUDO, there are five things you need to know how to do: Writing and Running programs, Creating new programs, Saving programs, Opening programs, and Setting program properties.

Writing and Running programs

To write a program, you need to click in the large white part of the JUDO window. When you do that, you will have a blinking cursor and you should type in your program. When you are done writing the program, press the "Run" button that is above where you type your program.

After you press the run button, your program will pop up on the screen if there were no errors. But if your program did have errors, they will appear in the little white area at the bottom of the JUDO window. You should read the error messages, fix the errors in your program, and then hit the Run button again.

Creating new programs

To create a new program, click on the "File" menu at the top-left part of the JUDO window and then click on "New". This will clear the area where you write your program so you can start writing a new one.

Saving programs

To save a program, click on the "File" menu, and then click "Save". A box will pop up asking you to give a name for your program. Type in a name that describes your program, and then click the "Save" button. If you want to save onto a floppy disk so you can take your program with you, use "Save to Floppy" on the "File" menu instead of "Save".

Opening programs

To open a program, click on the "File" menu, and then click "Open Program...". A box will pop up saying to choose a program to open. There will be a box with an arrow at the right edge. Click the box and choose which program you want to open, and then click the "OK" button. To open a program off of a floppy disk, use "Open Program From Floppy..." on the "File" menu instead of "Open Program...".

Setting program properties

There are three different kinds of windows that you can have your JUDO pop up in after you hit the run button. The first kind is "Text". A text program does everything by printing out words and having the user type in words. An example text program would be one that asks the user for their name and age.

The second kind of program is "Graphics". A graphics program does everything by painting colored shapes, lines, and words on the screen. An example graphics program would be one that draws a clown face using circles, squares, and lines.

The third kind of program is "Text and Graphics". You can do everything with text and graphics.

Before you run your program, you must set which type of program you want to write. This is done by clicking the "Program" menu and then clicking "Program Properties...". Then chose the type of program and click "OK".

To get a feel for JUDO, you can try out some of the programs that come with it. As described above, try opening a file. You will see that there are already some programs there for you to open. Open one and run it. See what happens. You can compare what the program that pops up does to the programs code.
After you have done this, you are ready to start learning Java and writing your own programs by looking through the tutorials.

Forward to the first part of the tutorial, JUDO and Java