<p>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?</p>

<p>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.</p>

```
Toolkit.getDefaultToolkit().beep();
```