应用错误收集

我在Java和Netbeans平台编程方面非常新鲜，我对10 Netbeans API（文件系统）中的一个示例有一个非常奇怪的问题。我使用的是Ubuntu 14.10，Java JDK 8，Netbeans 8.0.1

我想在点击菜单元素后在swing消息框中显示一些数据。进口很好，dep libs很好，所有编译都很好。但是，当我点击我的高级菜单项时，我有例外：

java.lang.ClassNotFoundException: javax.swing.JOptionPane not found by org.netbeans.word.module.fsdemo [42]
    at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1532)
    at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:75)
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1955)
Caused: java.lang.ClassNotFoundException: *** Class 'javax.swing.JOptionPane' was not found because bundle org.netbeans.word.module.fsdemo [42] does not import 'javax.swing' even though bundle org.apache.felix.framework [0] does export it. Additionally, the class is also available from the system class loader. There are two fixes: 1) Add an import for 'javax.swing' to bundle org.netbeans.word.module.fsdemo [42]; imports are necessary for each class directly touched by bundle code or indirectly touched, such as super classes if their methods are used. 2) Add package 'javax.swing' to the 'org.osgi.framework.bootdelegation' property; a library or VM bug can cause classes to be loaded by the wrong class loader. The first approach is preferable for preserving modularity. ***
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1968)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
Caused: java.lang.NoClassDefFoundError: javax/swing/JOptionPane
    at org.netbeans.word.module.fsdemo.MenuViewer.actionPerformed(MenuViewer.java:33)
    at org.openide.awt.AlwaysEnabledAction$1.run(AlwaysEnabledAction.java:199)
    at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95)
    at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116)
    at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
    at org.openide.awt.AlwaysEnabledAction.actionPerformed(AlwaysEnabledAction.java:202)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)
    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:6525)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
    at java.awt.Component.processEvent(Component.java:6290)
    at java.awt.Container.processEvent(Container.java:2234)
    at java.awt.Component.dispatchEventImpl(Component.java:4881)
    at java.awt.Container.dispatchEventImpl(Container.java:2292)
    at java.awt.Component.dispatchEvent(Component.java:4703)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
    at java.awt.Container.dispatchEventImpl(Container.java:2278)
    at java.awt.Window.dispatchEventImpl(Window.java:2739)
    at java.awt.Component.dispatchEvent(Component.java:4703)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:746)
    at java.awt.EventQueue.access$400(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:697)
    at java.awt.EventQueue$3.run(EventQueue.java:691)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.awt.EventQueue$4.run(EventQueue.java:719)
    at java.awt.EventQueue$4.run(EventQueue.java:717)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:716)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
[catch] at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

我正在尝试导入所有javax.spring。*包，但它根本不起作用。有趣，因为在其他类型的模块类（如windows等）中，相同的代码工作正常。这是我要查看的花哨代码：


    package org.netbeans.word.module.fsdemo;

    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import javax.swing.JOptionPane;
    import org.openide.awt.ActionID;
    import org.openide.awt.ActionReference;
    import org.openide.awt.ActionRegistration;
    import org.openide.filesystems.FileObject;
    import org.openide.filesystems.FileUtil;
    import org.openide.util.NbBundle.Messages;

    @ActionID(
            category = "Edit",
            id = "org.netbeans.word.module.fsdemo.MenuViewer"
    )
    @ActionRegistration(
            displayName = "#CTL_MenuViewer"
    )
    @ActionReference(path = "Menu/Edit", position = 2600, separatorBefore = 2550, separatorAfter = 2650)
    @Messages("CTL_MenuViewer=Viewer")
    public final class MenuViewer implements ActionListener {

        private FileObject root;
        private FileObject dir;

        @Override
        public void actionPerformed(ActionEvent event) {
            root = FileUtil.getConfigRoot();
            dir = root.getFileObject("Menu");
            for (FileObject oneItem : dir.getChildren()) {
                JOptionPane.showMessageDialog(null, "Info", oneItem.getName(), JOptionPane.INFORMATION_MESSAGE);
            }
        }
    }

未找到javax.swing.JOptionPane的Netbeans异常类

1 个答案: