public void setMinimumTabWidth( int tabIndex, int minimumTabWidth ) {
		JComponent c = (JComponent) getComponentAt( tabIndex );
		c.putClientProperty( TABBED_PANE_MINIMUM_TAB_WIDTH, (minimumTabWidth >= 0) ? minimumTabWidth : null );
	}
Specifies the minimum width of the tab at the given tab index.
flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/components/FlatTabbedPane.java