当前位置： 文江博客话题详情

将 JTable 添加到对话框内的窗格中，打包时会抛出 NPE

发布于 2024-12-08 08:18:05 字数 7541 浏览 0 评论 0原文

我创建了一个JDialog。当它出现时，我有一个 JTabbedPane ，上面有几个 FormPanel 。表单面板作为表单文件加载（我使用 Abeille 创建表单。）没有问题，直到我尝试将 JTable 添加到其中一个表单（再次通过 Abeille）。我像添加其余选项卡一样添加表单，但是当我运行 dialog. pack，它会抛出一个NullPointerException。该表单内的表格似乎不是 null 因为我可以从中获取值。我看不出是什么导致了 null。

private JDialog m_dialog;
private FormPanel m_panelForm;
private FormPanel m_tableEditorForm;
private FormPanel m_fieldEditorForm;
private FormPanel m_seedDataEditorForm;

JFrame appFrame = App.getInstance().getFrame();
m_dialog = new JDialog(appFrame, "Dialog Title"), true);
m_dialog.setName("Dialog"));
m_dialog.setLocationRelativeTo(appFrame);

// Load dialog layout
m_panelForm = getFormPanel("DLG_EDIT_PANEL");
m_tableEditorForm = getFormPanel("DLG_TABLE_EDITOR");
m_fieldEditorForm = getFormPanel("DLG_FIELD_EDITOR");
m_seedDataEditorForm = getFormPanel("DLG_SEED_DATA_EDITOR");

JTabbedPane pane = m_panelForm.getTabbedPane("editPane");

//Set up the tabs
pane.insertTab("Table", null, m_tableEditorForm, null, 0);
pane.insertTab("Field", null, m_fieldEditorForm, null, 1);
pane.insertTab("Seed", null, m_seedDataEditorForm, null, 2);

m_panelForm.reset();

m_dialog.setContentPane(m_panelForm);
m_dialog.pack();

第三个插入物，即所谓的“种子”，就是将其吹灭的那个；如果我注释掉该行，其他选项卡会显示正常。同样，如果我从 Abeille 的表单中删除 JTable ，选项卡就会显示正常。

请注意，columnCount 和 rowCount 默认为 2。另请注意，如果我关闭 pack，我会关闭 JDialog 的 setVisible 抛出同样的错误。

任何帮助将不胜感激；我在 Swing 上还不错，但还差得远。

堆栈跟踪：

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at com.jeta.open.support.DefaultComponentFinder.unregisterComponent(Unknown Source)
    at com.jeta.open.support.DefaultComponentFinder.componentRemoved(Unknown Source)
    at java.awt.AWTEventMulticaster.componentRemoved(AWTEventMulticaster.java:193)
    at java.awt.Container.processContainerEvent(Container.java:2070)
    at java.awt.Container.processEvent(Container.java:2038)
    at java.awt.Component.dispatchEventImpl(Component.java:4652)
    at java.awt.Container.dispatchEventImpl(Container.java:2099)
    at java.awt.Component.dispatchEvent(Component.java:4482)
    at java.awt.Container.remove(Container.java:1162)
    at java.awt.Container.remove(Container.java:1198)
    at java.awt.Container.addImpl(Container.java:1046)
    at java.awt.Container.add(Container.java:927)
    at javax.swing.plaf.basic.BasicScrollPaneUI.updateColumnHeader(BasicScrollPaneUI.java:606)
    at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.scrollPanePropertyChange(BasicScrollPaneUI.java:1102)
    at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.propertyChange(BasicScrollPaneUI.java:1079)
    at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
    at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
    at java.awt.Component.firePropertyChange(Component.java:8154)
    at javax.swing.JScrollPane.setColumnHeader(JScrollPane.java:1095)
    at javax.swing.JScrollPane.setColumnHeaderView(JScrollPane.java:1120)
    at javax.swing.JTable.configureEnclosingScrollPane(JTable.java:713)
    at javax.swing.JTable.addNotify(JTable.java:684)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at javax.swing.JRootPane.addNotify(JRootPane.java:739)
    at java.awt.Container.addNotify(Container.java:2578)
    at java.awt.Window.addNotify(Window.java:663)
    at java.awt.Dialog.addNotify(Dialog.java:743)
    at java.awt.Window.pack(Window.java:704)
    at com.follett.fsc.core.utils.schema.workbench.gui.dialogs.EditTableDialog.showDialog(EditTableDialog.java:108)
    at com.follett.fsc.core.utils.schema.workbench.gui.components.Tab.doEditTableRow(Tab.java:1354)
    at com.follett.fsc.core.utils.schema.workbench.gui.components.Tab.doEditRow(Tab.java:1437)
    at com.follett.fsc.core.utils.schema.workbench.gui.components.Tab$17$1.run(Tab.java:1016)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
    at java.awt.EventQueue.access$000(EventQueue.java:85)
    at java.awt.EventQueue$1.run(EventQueue.java:603)
    at java.awt.EventQueue$1.run(EventQueue.java:601)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
原文

I have created a JDialog. When it comes up, I have a JTabbedPane that has several FormPanels on it. The form panels are loaded in as a form file (I used Abeille to create the forms.) I have had no problems until I tried to add a JTable to one of the forms (again, through Abeille.) I add the form like I did the rest of the tabs, but when I run dialog.pack, it throws a NullPointerException. The table inside that form does not appear to be null as I can get values from it. I cannot see what is causing the null.

private JDialog m_dialog;
private FormPanel m_panelForm;
private FormPanel m_tableEditorForm;
private FormPanel m_fieldEditorForm;
private FormPanel m_seedDataEditorForm;

JFrame appFrame = App.getInstance().getFrame();
m_dialog = new JDialog(appFrame, "Dialog Title"), true);
m_dialog.setName("Dialog"));
m_dialog.setLocationRelativeTo(appFrame);

// Load dialog layout
m_panelForm = getFormPanel("DLG_EDIT_PANEL");
m_tableEditorForm = getFormPanel("DLG_TABLE_EDITOR");
m_fieldEditorForm = getFormPanel("DLG_FIELD_EDITOR");
m_seedDataEditorForm = getFormPanel("DLG_SEED_DATA_EDITOR");

JTabbedPane pane = m_panelForm.getTabbedPane("editPane");

//Set up the tabs
pane.insertTab("Table", null, m_tableEditorForm, null, 0);
pane.insertTab("Field", null, m_fieldEditorForm, null, 1);
pane.insertTab("Seed", null, m_seedDataEditorForm, null, 2);

m_panelForm.reset();

m_dialog.setContentPane(m_panelForm);
m_dialog.pack();

The third insert, the one called "Seed" is the one that blows it out; if I comment out the line the other tabs show up fine. Similarly, if I remove the JTable from the form in Abeille the tab shows up fine.

Note the columnCount and rowCount defaults to 2. Also note that if I turn off pack, I have a setVisible off of the JDialog that throws the same error.

Any help would be appreciated; I'm okay at Swing but far from good.

Stacktrace:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at com.jeta.open.support.DefaultComponentFinder.unregisterComponent(Unknown Source)
    at com.jeta.open.support.DefaultComponentFinder.componentRemoved(Unknown Source)
    at java.awt.AWTEventMulticaster.componentRemoved(AWTEventMulticaster.java:193)
    at java.awt.Container.processContainerEvent(Container.java:2070)
    at java.awt.Container.processEvent(Container.java:2038)
    at java.awt.Component.dispatchEventImpl(Component.java:4652)
    at java.awt.Container.dispatchEventImpl(Container.java:2099)
    at java.awt.Component.dispatchEvent(Component.java:4482)
    at java.awt.Container.remove(Container.java:1162)
    at java.awt.Container.remove(Container.java:1198)
    at java.awt.Container.addImpl(Container.java:1046)
    at java.awt.Container.add(Container.java:927)
    at javax.swing.plaf.basic.BasicScrollPaneUI.updateColumnHeader(BasicScrollPaneUI.java:606)
    at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.scrollPanePropertyChange(BasicScrollPaneUI.java:1102)
    at javax.swing.plaf.basic.BasicScrollPaneUI$Handler.propertyChange(BasicScrollPaneUI.java:1079)
    at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
    at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
    at java.awt.Component.firePropertyChange(Component.java:8154)
    at javax.swing.JScrollPane.setColumnHeader(JScrollPane.java:1095)
    at javax.swing.JScrollPane.setColumnHeaderView(JScrollPane.java:1120)
    at javax.swing.JTable.configureEnclosingScrollPane(JTable.java:713)
    at javax.swing.JTable.addNotify(JTable.java:684)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at java.awt.Container.addNotify(Container.java:2578)
    at javax.swing.JComponent.addNotify(JComponent.java:4685)
    at javax.swing.JRootPane.addNotify(JRootPane.java:739)
    at java.awt.Container.addNotify(Container.java:2578)
    at java.awt.Window.addNotify(Window.java:663)
    at java.awt.Dialog.addNotify(Dialog.java:743)
    at java.awt.Window.pack(Window.java:704)
    at com.follett.fsc.core.utils.schema.workbench.gui.dialogs.EditTableDialog.showDialog(EditTableDialog.java:108)
    at com.follett.fsc.core.utils.schema.workbench.gui.components.Tab.doEditTableRow(Tab.java:1354)
    at com.follett.fsc.core.utils.schema.workbench.gui.components.Tab.doEditRow(Tab.java:1437)
    at com.follett.fsc.core.utils.schema.workbench.gui.components.Tab$17$1.run(Tab.java:1016)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
    at java.awt.EventQueue.access$000(EventQueue.java:85)
    at java.awt.EventQueue$1.run(EventQueue.java:603)
    at java.awt.EventQueue$1.run(EventQueue.java:601)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

扫码二维码加入Web技术交流群

发布评论

需要 登录 才能够评论， 你可以免费 注册 一个本站的账号。
列表为空，暂无数据

关于作者

醉生梦死

暂无简介

0 文章
0 评论
388 人气
发私信

相关话题

更多

热门标签

操作系统 程序设计 IT运维 Linux系统管理 JavaScript 服务器应用 solaris C/C++ PHP Shell BSD Vue.js aix Oracle Python HTML 系统管理 HTML5 CSS 前端
更多

推荐作者

胡图图

文章 0 评论 0

zt006

文章 0 评论 0

z祗昰~

文章 0 评论 0

冰葑

文章 0 评论 0

野の

文章 0 评论 0

天空

文章 0 评论 0

更多

友情链接

文江博客
    我们使用 Cookies 和其他技术来定制您的体验包括您的登录状态等。通过阅读我们的 隐私政策 了解更多相关信息。 单击 接受 或继续使用网站，即表示您同意使用 Cookies 和您的相关数据。
    原文