NetBeans Matisse中的表单加载错误

Question

我是JAVA桌面应用程序开发的新手，最初开始在默认包下创建所有类。后来我才知道这不是一个好习惯，所以我根据他们的功能将我的课程移到了不同​​的包中。作为这种转变的一部分，我通过重构将我的GUI类和两个自定义JPanel组件一起移动到一个包（bd.ac.du.bmpt.gui）中。然后我做了一个干净的构建我的项目，并运行应用程序。一切似乎都很好。没有编译或运行时错误或任何东西。但是当我尝试在GUI类中切换到设计视图时，它会显示表单加载错误，这些错误都与两个自定义JPanel组件有关。

它抛出了这些例外：

java.lang.ClassNotFoundException: GPanel
    at org.netbeans.modules.form.project.ProjectClassLoader.findClass(ProjectClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at org.netbeans.modules.form.project.FormClassLoader.findClass(FormClassLoader.java:83)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:266)
    at org.netbeans.modules.form.project.ClassPathUtils.loadClass(ClassPathUtils.java:114)
    at org.netbeans.modules.form.FormUtils.loadClass(FormUtils.java:1474)
    at org.netbeans.modules.form.PersistenceObjectRegistry.loadClass(PersistenceObjectRegistry.java:98)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:718)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:530)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:312)
    at org.netbeans.modules.form.FormEditor$2.run(FormEditor.java:348)
    at org.netbeans.modules.form.FormLAF$2.run(FormLAF.java:293)
    at org.openide.util.Mutex.doEventAccess(Mutex.java:1363)
    at org.openide.util.Mutex.readAccess(Mutex.java:322)
    at org.netbeans.modules.form.FormLAF.executeWithLookAndFeel(FormLAF.java:276)
    at org.netbeans.modules.form.FormEditor.loadFormData(FormEditor.java:345)
    at org.netbeans.modules.nbform.FormEditorSupport.loadOpeningForm(FormEditorSupport.java:462)
    at org.netbeans.modules.nbform.FormDesignerTC.loadForm(FormDesignerTC.java:279)
    at org.netbeans.modules.nbform.FormDesignerTC.access$300(FormDesignerTC.java:87)
    at org.netbeans.modules.nbform.FormDesignerTC$PreLoadTask$1.run(FormDesignerTC.java:268)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:688)
    at java.awt.EventQueue$3.run(EventQueue.java:686)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:697)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
    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)
java.lang.ClassNotFoundException: GPanel
    at org.netbeans.modules.form.project.ProjectClassLoader.findClass(ProjectClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at org.netbeans.modules.form.project.FormClassLoader.findClass(FormClassLoader.java:83)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:266)
    at org.netbeans.modules.form.project.ClassPathUtils.loadClass(ClassPathUtils.java:114)
    at org.netbeans.modules.form.FormUtils.loadClass(FormUtils.java:1474)
    at org.netbeans.modules.form.PersistenceObjectRegistry.loadClass(PersistenceObjectRegistry.java:98)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:718)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:530)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:312)
    at org.netbeans.modules.form.FormEditor$2.run(FormEditor.java:348)
    at org.netbeans.modules.form.FormLAF$2.run(FormLAF.java:293)
    at org.openide.util.Mutex.doEventAccess(Mutex.java:1363)
    at org.openide.util.Mutex.readAccess(Mutex.java:322)
    at org.netbeans.modules.form.FormLAF.executeWithLookAndFeel(FormLAF.java:276)
    at org.netbeans.modules.form.FormEditor.loadFormData(FormEditor.java:345)
    at org.netbeans.modules.nbform.FormEditorSupport.loadOpeningForm(FormEditorSupport.java:462)
    at org.netbeans.modules.nbform.FormDesignerTC.loadForm(FormDesignerTC.java:279)
    at org.netbeans.modules.nbform.FormDesignerTC.access$300(FormDesignerTC.java:87)
    at org.netbeans.modules.nbform.FormDesignerTC$PreLoadTask$1.run(FormDesignerTC.java:268)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:688)
    at java.awt.EventQueue$3.run(EventQueue.java:686)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:697)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
    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)
java.lang.ClassNotFoundException: GridPanel
    at org.netbeans.modules.form.project.ProjectClassLoader.findClass(ProjectClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at org.netbeans.modules.form.project.FormClassLoader.findClass(FormClassLoader.java:83)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:266)
    at org.netbeans.modules.form.project.ClassPathUtils.loadClass(ClassPathUtils.java:114)
    at org.netbeans.modules.form.FormUtils.loadClass(FormUtils.java:1474)
    at org.netbeans.modules.form.PersistenceObjectRegistry.loadClass(PersistenceObjectRegistry.java:98)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:718)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:530)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:312)
    at org.netbeans.modules.form.FormEditor$2.run(FormEditor.java:348)
    at org.netbeans.modules.form.FormLAF$2.run(FormLAF.java:293)
    at org.openide.util.Mutex.doEventAccess(Mutex.java:1363)
    at org.openide.util.Mutex.readAccess(Mutex.java:322)
    at org.netbeans.modules.form.FormLAF.executeWithLookAndFeel(FormLAF.java:276)
    at org.netbeans.modules.form.FormEditor.loadFormData(FormEditor.java:345)
    at org.netbeans.modules.nbform.FormEditorSupport.loadOpeningForm(FormEditorSupport.java:462)
    at org.netbeans.modules.nbform.FormDesignerTC.loadForm(FormDesignerTC.java:279)
    at org.netbeans.modules.nbform.FormDesignerTC.access$300(FormDesignerTC.java:87)
    at org.netbeans.modules.nbform.FormDesignerTC$PreLoadTask$1.run(FormDesignerTC.java:268)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:688)
    at java.awt.EventQueue$3.run(EventQueue.java:686)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:697)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
    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)
java.lang.ClassNotFoundException: GPanel
    at org.netbeans.modules.form.project.ProjectClassLoader.findClass(ProjectClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at org.netbeans.modules.form.project.FormClassLoader.findClass(FormClassLoader.java:83)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:266)
    at org.netbeans.modules.form.project.ClassPathUtils.loadClass(ClassPathUtils.java:114)
    at org.netbeans.modules.form.FormUtils.loadClass(FormUtils.java:1474)
    at org.netbeans.modules.form.PersistenceObjectRegistry.loadClass(PersistenceObjectRegistry.java:98)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:718)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:530)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:312)
    at org.netbeans.modules.form.FormEditor$2.run(FormEditor.java:348)
    at org.netbeans.modules.form.FormLAF$2.run(FormLAF.java:293)
    at org.openide.util.Mutex.doEventAccess(Mutex.java:1363)
    at org.openide.util.Mutex.readAccess(Mutex.java:322)
    at org.netbeans.modules.form.FormLAF.executeWithLookAndFeel(FormLAF.java:276)
    at org.netbeans.modules.form.FormEditor.loadFormData(FormEditor.java:345)
    at org.netbeans.modules.nbform.FormEditorSupport.loadOpeningForm(FormEditorSupport.java:462)
    at org.netbeans.modules.nbform.FormDesignerTC.loadForm(FormDesignerTC.java:279)
    at org.netbeans.modules.nbform.FormDesignerTC.access$300(FormDesignerTC.java:87)
    at org.netbeans.modules.nbform.FormDesignerTC$PreLoadTask$1.run(FormDesignerTC.java:268)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:688)
    at java.awt.EventQueue$3.run(EventQueue.java:686)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:697)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
    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)
java.lang.ClassNotFoundException: GPanel
    at org.netbeans.modules.form.project.ProjectClassLoader.findClass(ProjectClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at org.netbeans.modules.form.project.FormClassLoader.findClass(FormClassLoader.java:83)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:266)
    at org.netbeans.modules.form.project.ClassPathUtils.loadClass(ClassPathUtils.java:114)
    at org.netbeans.modules.form.FormUtils.loadClass(FormUtils.java:1474)
    at org.netbeans.modules.form.PersistenceObjectRegistry.loadClass(PersistenceObjectRegistry.java:98)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:718)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.restoreComponent(GandalfPersistenceManager.java:850)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadComponent(GandalfPersistenceManager.java:994)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:530)
    at org.netbeans.modules.form.GandalfPersistenceManager.loadForm(GandalfPersistenceManager.java:312)
    at org.netbeans.modules.form.FormEditor$2.run(FormEditor.java:348)
    at org.netbeans.modules.form.FormLAF$2.run(FormLAF.java:293)
    at org.openide.util.Mutex.doEventAccess(Mutex.java:1363)
    at org.openide.util.Mutex.readAccess(Mutex.java:322)
    at org.netbeans.modules.form.FormLAF.executeWithLookAndFeel(FormLAF.java:276)
    at org.netbeans.modules.form.FormEditor.loadFormData(FormEditor.java:345)
    at org.netbeans.modules.nbform.FormEditorSupport.loadOpeningForm(FormEditorSupport.java:462)
    at org.netbeans.modules.nbform.FormDesignerTC.loadForm(FormDesignerTC.java:279)
    at org.netbeans.modules.nbform.FormDesignerTC.access$300(FormDesignerTC.java:87)
    at org.netbeans.modules.nbform.FormDesignerTC$PreLoadTask$1.run(FormDesignerTC.java:268)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:688)
    at java.awt.EventQueue$3.run(EventQueue.java:686)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:697)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
    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)

我在这里缺少什么？

Answer 1

行。多谢你们。我找到了问题并解决了它。

问题出在Matisse的额外生成代码中。重构没有更改这两个自定义JPanel组件的类名。我不得不在java源代码和.form数据中手动修改它们。例如：GPanel - ＆gt; bd.ac.du.bmpt.GPanel