Java: way to completely disable any Swing unwanted beeps?

Question

I am working on a fairly complex Java application using Swing.

On some occasions there are unwanted beeps without any user intervention. No crash, application keeps

Answer 1

Your problem is discussed on the Java Forum:

// Write a custom toolkit
public class MyToolkit extends sun.awt.windows.WToolkit 
{
  public void beep() {
  }
}

// Set this property
System.setProperty("awt.toolkit", "MyPackage.MyToolkit");

NOTE: The use of this workaround is discouraged. You should still try to find the root of the problem.

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Edit: Removed a link, since the thread on Java Forum is now offline.

Answer 2

In Swing you need to override the LookAndFeel as follows:

UIManager.setLookAndFeel(new NimbusLookAndFeel() {

  @Override
  public void provideErrorFeedback(Component component) {

    // Your beep decision goes here

    // You want error feedback 
    super.provideErrorFeedback(component);

  }
});

Typically your beep decision would reference some kind of external configuration/preferences flag for your application.