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Head First Java problem

Pete Blamire

Joined: Oct 22, 2009
Posts: 1
Hi all,

Wondered if anyone had ever come across this problem...

I'm working my way through the Head First Java book, and am putting together the music player. Reached the third part of that, combining blobs and music. what I've found is that I get no sound (yep I have checked the volume . Also I only get a window and no blobs. When I use the downloaded code I get the blobs but still no music. I'm puzzled as I can't see any obvious typos in my code, included below in case you guys can.


Ulf Dittmer

Joined: Mar 22, 2005
Posts: 42965
This is a bad idea:
} catch (Exception e) { }

How will you know if there are problems? At least print something to the console.
Campbell Ritchie

Joined: Oct 13, 2005
Posts: 46412
. . . and welcome to JavaRanch
sujani Koya

Joined: Jul 31, 2011
Posts: 1
I compiled this same text and ran it. I was getting the music but a blank frame.

I wrote a program for this on my own with frequent updates from the book - without copying directly- and i get music with a single rectange that does not change with the note.

Some technical guru ought to guide us to find the problem. Anyone??

Ogeh Ikem
Ranch Hand

Joined: May 13, 2002
Posts: 180
Try overriding the paintComponent method by changing

Matt Hanrahan

Joined: Jul 09, 2011
Posts: 14

I'm guessing this is all old news, but you may want to try to change the paintComponent lines to:

I just compiled and ran a slightly different version and it all seems to work fine. If you'd like to try it I will post it below.
Did the first two iterations work on the command line? I'm just learning also, but hopefully this will help.
I added a little code to the catch statements also.

I was also having the closing problem as discussed in some other forum topics, and so add an EXIT_ON_CLOSE statement to the setUpGui method.

Good Luck,

I agree. Here's the link:
subject: Head First Java problem
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