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在javaFX中，我在表视图中将dianamically列作为一个父列添加，而其中两列是子列。然后我在java 8 b-109中获得了特定的输出，但是当我在java 8 b-124中运行相同的代码时，则出现以下错误。所以，请帮助我。javafx for java 8中的嵌套列标题错误b-124
Exception in thread "JavaFX Application Thread" java.lang.NullPointerException
at com.sun.javafx.scene.control.skin.NestedTableColumnHeader.dispose(NestedTableColumnHeader.java:323)
at com.sun.javafx.scene.control.skin.NestedTableColumnHeader.updateTableColumnHeaders(NestedTableColumnHeader.java:265)
at com.sun.javafx.scene.control.skin.NestedTableColumnHeader.checkState(NestedTableColumnHeader.java:519)
at com.sun.javafx.scene.control.skin.NestedTableColumnHeader.computePrefHeight(NestedTableColumnHeader.java:401)
at javafx.scene.Parent.prefHeight(Parent.java:918)
at javafx.scene.layout.Region.prefHeight(Region.java:1438)
at com.sun.javafx.scene.control.skin.TableHeaderRow.computePrefHeight(TableHeaderRow.java:344)
at com.sun.javafx.scene.control.skin.TableHeaderRow.computeMinHeight(TableHeaderRow.java:339)
at javafx.scene.Parent.minHeight(Parent.java:946)
at javafx.scene.layout.Region.minHeight(Region.java:1404)
at javafx.scene.control.SkinBase.computeMinHeight(SkinBase.java:254)
at javafx.scene.control.Control.computeMinHeight(Control.java:485)
at javafx.scene.Parent.minHeight(Parent.java:946)
at javafx.scene.layout.Region.minHeight(Region.java:1404)
at javafx.scene.layout.Region.computeChildMinAreaHeight(Region.java:1700)
at javafx.scene.layout.Region.getMaxAreaHeight(Region.java:1981)
at javafx.scene.layout.Region.computeMaxMinAreaHeight(Region.java:1850)
at javafx.scene.layout.HBox.computeMinHeight(HBox.java:419)
at javafx.scene.Parent.minHeight(Parent.java:946)
at javafx.scene.layout.Region.minHeight(Region.java:1404)
at javafx.scene.layout.AnchorPane.computeHeight(AnchorPane.java:297)
at javafx.scene.layout.AnchorPane.computeMinHeight(AnchorPane.java:246)
at javafx.scene.Parent.minHeight(Parent.java:946)
at javafx.scene.layout.Region.minHeight(Region.java:1404)
at javafx.scene.layout.Region.computeChildMinAreaHeight(Region.java:1700)
at javafx.scene.layout.Region.getMaxAreaHeight(Region.java:1981)
at javafx.scene.layout.Region.computeMaxMinAreaHeight(Region.java:1850)
at javafx.scene.layout.HBox.computeMinHeight(HBox.java:419)
at javafx.scene.Parent.minHeight(Parent.java:946)
at javafx.scene.layout.Region.minHeight(Region.java:1404)
at javafx.scene.layout.Region.computeChildMinAreaHeight(Region.java:1700)
at javafx.scene.layout.VBox.getAreaHeights(VBox.java:440)
at javafx.scene.layout.VBox.computeContentHeight(VBox.java:522)
at javafx.scene.layout.VBox.computeMinHeight(VBox.java:400)
at javafx.scene.Parent.minHeight(Parent.java:946)
at javafx.scene.layout.Region.minHeight(Region.java:1404)
at javafx.scene.layout.Region.computeChildMinAreaHeight(Region.java:1700)
at javafx.scene.layout.VBox.getAreaHeights(VBox.java:440)
at javafx.scene.layout.VBox.computeContentHeight(VBox.java:522)
at javafx.scene.layout.VBox.computeMinHeight(VBox.java:400)
at javafx.scene.Parent.minHeight(Parent.java:946)
at javafx.scene.layout.Region.minHeight(Region.java:1404)
at javafx.scene.layout.Region.computeChildPrefAreaHeight(Region.java:1765)
at javafx.scene.layout.VBox.getAreaHeights(VBox.java:446)
at javafx.scene.layout.VBox.computeContentHeight(VBox.java:522)
at javafx.scene.layout.VBox.computePrefHeight(VBox.java:421)
at javafx.scene.Parent.prefHeight(Parent.java:918)
at javafx.scene.layout.Region.prefHeight(Region.java:1438)
at javafx.scene.layout.AnchorPane.computeHeight(AnchorPane.java:297)
at javafx.scene.layout.AnchorPane.computePrefHeight(AnchorPane.java:254)
at javafx.scene.Parent.prefHeight(Parent.java:918)
at javafx.scene.layout.Region.prefHeight(Region.java:1438)
at javafx.scene.layout.Region.minHeight(Region.java:1406)
at com.sun.javafx.scene.control.skin.ScrollPaneSkin.computeScrollNodeSize(ScrollPaneSkin.java:917)
at com.sun.javafx.scene.control.skin.ScrollPaneSkin.layoutChildren(ScrollPaneSkin.java:791)
at javafx.scene.control.Control.layoutChildren(Control.java:574)
at javafx.scene.Parent.layout(Parent.java:1076)
at javafx.scene.Parent.layout(Parent.java:1082)
at javafx.scene.Parent.layout(Parent.java:1082)
at javafx.scene.Parent.layout(Parent.java:1082)
at javafx.scene.Parent.layout(Parent.java:1082)
at javafx.scene.Parent.layout(Parent.java:1082)
at javafx.scene.Parent.layout(Parent.java:1082)
at javafx.scene.Parent.layout(Parent.java:1082)
at javafx.scene.Parent.layout(Parent.java:1082)
at javafx.scene.Parent.layout(Parent.java:1082)
at javafx.scene.Parent.layout(Parent.java:1082)
at javafx.scene.Scene.doLayoutPass(Scene.java:576)
at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:2386)
at com.sun.javafx.tk.Toolkit$3.run(Toolkit.java:322)
at com.sun.javafx.tk.Toolkit$3.run(Toolkit.java:320)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.Toolkit.runPulse(Toolkit.java:320)
at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:349)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:479)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:460)
at com.sun.javafx.tk.quantum.QuantumToolkit$13.run(QuantumToolkit.java:327)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$300(WinApplication.java:39)
at com.sun.glass.ui.win.WinApplication$4$1.run(WinApplication.java:112)
at java.lang.Thread.run(Thread.java:744)
这可能是值得尝试的最新版本（b128） - 我记得几周前在嵌套头文件中发现了一些错误修复。 – assylias
同样问题http://stackoverflow.com/questions/21697949/how-to-resolve-nested-column-in-tableview-afetr-update-version-of-java-124-in-ja/22078957#22078957 – user2163960