Head First - MiniMiniMusicCmdLine

[Teri Fisher]

I give up, I've been trying to change the instrument and note args for this thing and all I get is the message "Don't forget the instrument and note args". What am I doing wrong?
Thanks

[marc weber]

When you run the command line version, you need to supply command-line arguments, as shown in the graphic at the bottom of page 346. The first argument (0-127) specifies the instrument, and the second argument (0-127) specifies the note. If you supply less than 2 arguments, then you will see the message you are describing.

[Teri Fisher]

I am using JCreator.

[Campbell Ritchie]

JCreatorLE or the posh version? I think you can probably supply command-line arguments to JCreator.
I used to use JCreator all the time, simply saving the files to a folder then using the command-line instructions on that folder. Worked nicely!

[Teri Fisher]

I guess the posh version. I thought I could just add-- mini(10,100); or plug args in somewhere below but it's not working.

 public static void main(String[] args) {
        MiniMiniMusicCmdLine mini = new MiniMiniMusicCmdLine();
        if (args.length < 2) {
            System.out.println("Don't forget the instrument and            note args");
        } else {
            int instrument = Integer.parseInt(args[0]);
            int note = Integer.parseInt(args[1]);
            mini.play(instrument, note);
        }
     }

[Campbell Ritchie]

Use System.err rather than System.out in the main method because you are printing an error.

I shall have to reboot and see what I can find in JCreator; it only works on windows and I am on Linux at present.

[Campbell Ritchie]

JCreator -> Help menu -> contents -> JCreator Manual -> Building and running code -> How to : set the main arguments -> etc.

[Teri Fisher]

I was wrong, it is LE which is maybe why the runtime Config is greyed out. Plus I have run everything else in this book from JCreator.
[ April 18, 2008: Message edited by: Teri Fisher ]

[Campbell Ritchie]

I tried the "show command line" and "prompt for arguments" boxes, and that worked.

[marc weber]

Originally posted by Teri Fisher:
I am using JCreator.

Uh... Okay. Let us know if Campbell's advice cleared things up for you. If not, I'll move this to the IDE forum for further discussion.

[Teri Fisher]

I haven't been able to find the "show command line" or the "prompt for args"

[Campbell Ritchie]

I've only got LE too; you don't seriously think I'd pay for it, do you?

What I described worked nicely; if you have trouble I'll go back to Windows and try giving more detail about what I did.

[Teri Fisher]

I haven't set up my path and such to run it from the command prompt, I'll have to look back at my notes to refresh my memory.

[Campbell Ritchie]

I see you are over on this forum now.
You ought to have the PATH set up when you start JCreator.

What it said in help was to go to build.

JCreator->Build->Configuration->highlight "default"->edit->run application tag->highlight "default"->edit->parameters tab->mark the boxes to prompt for main method arguments->OK->OK.

That worked when I tried it earlier.

[Teri Fisher]

I can't access Runtime Configuration.......

[Campbell Ritchie]

Try putting your classes into a project, then click the name of the project first, then you should get a the runtime configuration.

You can save the classes from JCreator and run them from an ordinary command line.

It is because of this sort of thing that we usually recommend not using an IDE as a beginner.