找不到具有preferredID的TopComponent
我正在尝试运行我的简单java程序，但是有一个大问题。 它与GUI连接。 它无法显示任何创建的窗口。 我附加了栈跟踪和一个类。
@ConvertAsProperties( dtd = "-//org.shop.viewer//ShopViewer//EN", autostore = false ) @TopComponent.Description( preferredID = "ShopViewerTopComponent", //iconBase="SET/PATH/TO/ICON/HERE", persistenceType = TopComponent.PERSISTENCE_ALWAYS ) @TopComponent.Registration(mode = "explorer", openAtStartup = false) @ActionID(category = "Window", id = "org.shop.viewer.ShopViewerTopComponent") @ActionReference(path = "Menu/Window" /*, position = 333 */) @TopComponent.OpenActionRegistration( displayName = "#CTL_ShopViewerAction", preferredID = "ShopViewerTopComponent" ) @Messages({ "CTL_ShopViewerAction=ShopViewer", "CTL_ShopViewerTopComponent=ShopViewer Window", "HINT_ShopViewerTopComponent=This is a ShopViewer window" }) public final class ShopViewerTopComponent extends TopComponent { public ShopViewerTopComponent() { initComponents(); setName(Bundle.CTL_ShopViewerTopComponent()); setToolTipText(Bundle.HINT_ShopViewerTopComponent()); EntityManager entityManager = Persistence.createEntityManagerFactory("ShopLibraryPU").createEntityManager(); Query query = entityManager.createNamedQuery("Shops.findAll"); List resultList = query.getResultList(); for (Shops c : resultList) { jTextArea1.append(c.getTitle() +"dqwdqwdqwdqwd"+ "\n"); } } java.lang.IllegalStateException: Cannot find TopComponent with preferredID ShopViewerTopComponent, see IDE log for more details. at org.openide.windows.OpenComponentAction.actionPerformed(OpenComponentAction.java:91) at org.openide.awt.AlwaysEnabledAction$1.run(AlwaysEnabledAction.java:198) at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95) at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116) at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99) at org.openide.awt.AlwaysEnabledAction.actionPerformed(AlwaysEnabledAction.java:201) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) at javax.swing.AbstractButton.doClick(AbstractButton.java:376) at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833) at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877) at java.awt.Component.processMouseEvent(Component.java:6505) at javax.swing.JComponent.processMouseEvent(JComponent.java:3321) at java.awt.Component.processEvent(Component.java:6270) at java.awt.Container.processEvent(Container.java:2229) at java.awt.Component.dispatchEventImpl(Component.java:4861) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java.awt.Component.dispatchEvent(Component.java:4687) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422) at java.awt.Container.dispatchEventImpl(Container.java:2273) at java.awt.Window.dispatchEventImpl(Window.java:2719) at java.awt.Component.dispatchEvent(Component.java:4687) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735) at java.awt.EventQueue.access$200(EventQueue.java:103) at java.awt.EventQueue$3.run(EventQueue.java:694) at java.awt.EventQueue$3.run(EventQueue.java:692) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87) at java.awt.EventQueue$4.run(EventQueue.java:708) at java.awt.EventQueue$4.run(EventQueue.java:706) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:705) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159) [catch] at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
我认为TopComponent构造函数中存在一个错误。
非常感谢。
在加载TopComponent之前出现问题时，此问题“无法找到具有preferredID的TopCoponent …”。
一个简单的例子：你试图在失败的构造函数中加载一些东西（在任何深度）。
这个无法解释的信息使我不止一次发疯！
希望这可以帮助。