java.lang.NullPointerException
        at com.sun.javafx.scene.control.skin.ListViewSkin$13.updateItem(ListViewSkin.java:192)
        at com.sun.javafx.scene.control.skin.ListViewSkin.configCell(ListViewSkin.java:213)
        at com.sun.javafx.scene.control.skin.ListViewSkin.configCell(ListViewSkin.java:26)
        at com.sun.javafx.scene.control.skin.ListViewSkin$2.run(ListViewSkin.java:47)
        at com.sun.javafx.scene.control.skin.ListViewSkin$2.run(ListViewSkin.java:45)
        at com.sun.javafx.scene.control.skin.VirtualFlow.setCellIndex(VirtualFlow.java:1316)
        at com.sun.javafx.scene.control.skin.VirtualFlow.getCell(VirtualFlow.java:1219)
        at com.sun.javafx.scene.control.skin.VirtualFlow.getCellLength(VirtualFlow.java:1242)
        at com.sun.javafx.scene.control.skin.VirtualFlow$3.run(VirtualFlow.java:417)
        at com.sun.javafx.scene.control.skin.VirtualFlow$3.run(VirtualFlow.java:415)
        at com.sun.javafx.scene.control.skin.PositionMapper.computeViewportOffset(PositionMapper.java:112)
        at com.sun.javafx.scene.control.skin.VirtualFlow.layoutChildren(VirtualFlow.java:786)
        at javafx.scene.Parent.layout(Parent.java:852)
        at javafx.scene.Scene.layoutDirtyRoots(Scene.java:469)
        at javafx.scene.Scene.doLayoutPass(Scene.java:442)
        at javafx.scene.Scene.access$2700(Scene.java:106)
        at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:1575)
        at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:268)
        at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:353)
        at com.sun.javafx.tk.quantum.QuantumToolkit$10.run(QuantumToolkit.java:289)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
        at com.sun.glass.ui.win.WinApplication$1$1.run(WinApplication.java:49)
        at java.lang.Thread.run(Thread.java:662)