setVisible(true) on the title bar has no effect, if the variable visible is already true and sometimes is the variable visible true, but the title bar is not shown (Perhaps when the variable visible was set to true before all listeners were registered).
setVisible(true) on the title bar has no effect, if the variable visible is already true and sometimes is the variable visible true, but the title bar is not shown (Perhaps when the variable visible was set to true before all listeners were registered).