java.lang.StringIndexOutOfBoundsException: String index out of range: 1
        at java.lang.String.codePointAt(Unknown Source)
        at javafx.scene.control.TextInputControl.deletePreviousChar(Unknown Source)
        at com.sun.javafx.scene.control.skin.TextFieldSkin.deleteChar(Unknown Source)
        at com.sun.javafx.scene.control.behavior.TextFieldBehavior.deleteChar(Unknown Source)
        at com.sun.javafx.scene.control.behavior.TextInputControlBehavior.deletePreviousChar(Unknown Source)
        at com.sun.javafx.scene.control.behavior.TextInputControlBehavior.callAction(Unknown Source)
        at com.sun.javafx.scene.control.behavior.BehaviorBase.callActionForEvent(Unknown Source)
        at com.sun.javafx.scene.control.behavior.TextInputControlBehavior.callActionForEvent(Unknown Source)
        at com.sun.javafx.scene.control.behavior.BehaviorBase$1.handle(Unknown Source)
        at com.sun.javafx.scene.control.behavior.BehaviorBase$1.handle(Unknown Source)
        at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
        at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
        at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
        at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
        at javafx.event.Event.fireEvent(Unknown Source)
        at javafx.scene.Scene$KeyHandler.process(Unknown Source)
        at javafx.scene.Scene$KeyHandler.access$1500(Unknown Source)
        at javafx.scene.Scene.impl_processKeyEvent(Unknown Source)
        at javafx.scene.Scene$ScenePeerListener.keyEvent(Unknown Source)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleKeyEvent(Unknown Source)
        at com.sun.glass.ui.View.handleKeyEvent(Unknown Source)
        at com.sun.glass.ui.View.notifyKey(Unknown Source)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.access$100(Unknown Source)
        at com.sun.glass.ui.win.WinApplication$2$1.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)