How to make a noise on the PC speaker with Java

Question

I want to alert the user in a Swing application of certain events with an old fashioned PC Speaker beep (NOT the soundcard), since not on every PC there is a soundcard with an attached speaker, or volume might be turned to zero, or a headphone might be connected... How can I do this?

UPDATE: java.awt.Toolkit.getDefaultToolkit().beep() seems usually to generate a sound on the soundcard. It only uses the speaker if there is no active soundcard. To print an ASCII value 7 works only if the application is launched in a terminal, which at least a Swing app usually isn't. So the question is still open.

Answer 1

Toolkit.getDefaultToolkit().beep();

Answer 2

Try this:

java.awt.Toolkit.getDefaultToolkit().beep();  

It worked for me, although I'm not sure whether this was the PC Speaker beep or some OS-generated beep.