java.lang.IllegalArgumentException: cannot add to layout: constraints must be a GridBagConstraint
	at java.awt.GridBagLayout.addLayoutComponent(GridBagLayout.java:685)
	at java.awt.Container.addImpl(Container.java:1068)
	at javax.swing.JToolBar.addImpl(JToolBar.java:561)
	at java.awt.Container.add(Container.java:366)
	at javax.swing.plaf.basic.BasicToolBarUI.setFloating(BasicToolBarUI.java:823)
	at javax.swing.plaf.basic.BasicToolBarUI.floatAt(BasicToolBarUI.java:1006)
	at javax.swing.plaf.basic.BasicToolBarUI$Handler.mouseReleased(BasicToolBarUI.java:1163)
	at java.awt.Component.processMouseEvent(Component.java:6038)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
	at java.awt.Component.processEvent(Component.java:5803)
	at java.awt.Container.processEvent(Container.java:2058)
	at java.awt.Component.dispatchEventImpl(Component.java:4410)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Component.dispatchEvent(Component.java:4240)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
	at java.awt.Container.dispatchEventImpl(Container.java:2102)
	at java.awt.Window.dispatchEventImpl(Window.java:2429)
	at java.awt.Component.dispatchEvent(Component.java:4240)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)