Swing UIManager default system look and feel

Question

I'm writing a Java application and I'm giving it a custom look and feel using the UIManager of Swing. There's a method named UIManager.getSystemLookAndFeelClassName() that returns the default look and feel of a system. I would like to know what look and feel it returns as default, when no system look and feel was detected, is it the Metal look and feel of Java itself?

Answer 1

See the docs for the function: UIManager:

Returns the name of the LookAndFeel class that implements the native system look and feel if there is one, otherwise the name of the default cross platform LookAndFeel class. This value can be overriden by setting the swing.systemlaf system property.

See also getCrossPlatformLookAndFeelClassName() in the same doc page.