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Extension Activity 3 – Compiling and running the SimpleMessagesapplication

In this exercise you will compile the 3 Java source files that are needed to run the SimpleMessages application. You will then run the application.

(1) create a new, empty directory (folder) on your computer’s hard disk called "Unit1Activity12".

(2) copy into this directory the following files from the SimpleMessages application page:

(3) Compile these source files as follows with the "javac" Java compiler:

If you get any error messages after entering a "javac" command, look up the problem in either the FAQ list or the "Debugging Java Programs"  list.

(4) Examine the list of files in this directory (either by viewing a folder window, or the command line "dir" command).

You should now have six files in your directory:

(5) Run the class containing the "main()" method you wish to execute – in this case you need to run the "DrawShapes" compiled class file.

(6) The "SimpleMessages" application window should appear on screen as shown below.

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