A javax.swing.border.EtchedBorder, a border that looks like a groove has been etched into the panel.
etchedBorder() takes no value arguments.
If any of shadow: or highlight: are specified, all must be specified.
- highlight <Color> The color that is to be painted on the highlight side of the etch.
- shadow <Color> The color that is to be painted on the shadow side of the etch.
- parent <boolean> Whether or not this border is to be added to the parent JComponent.
etchedBorder() is a leaf node, no child content is allowed.