为什么在jitsi中，我不能将一个包的类访问到另一个包中，它会抛出ClassNotFoundException？
如果有人帮助我，我将包net.java.sip.communicator.impl.gui.main.account的一个方法net.java.sip.communicator.impl.gui.main.account调用为另一个包net.java.sip.communicator.plugin.simpleaccreg的SimpleAccountRegistrationActivator类，但它会抛出以下异常.
net/java/sip/communicator/impl/gui/main/account/NewAccountDialog at net.java.sip.communicator.plugin.simpleaccreg.SimpleAccountRegistrationActivator$LoginFrame$1.actionPerformed(SimpleAccountRegistrationActivator.java:302) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.plaf.basic.BasicButtonListener。javax.swing.JComponent.processMouseEvent(Unknown (未知源)在java.awt.Component.processEvent(未知源)，java.awt.Component.dispatchEventImpl(未知源)，java.awt.Container.dispatchEventImpl(未知源)，java.awt.Component.dispatchEvent(未知源)，java.awt.Component.processMouseEvent(未知源)，java.awt.Component.processEvent(未知源)，java.awt.Container.processEvent(未知源)，java.awt.Component.dispatchEventImpl(未知源)，java.awt.Container.dispatchEventImpl(未知源)，java.awt.Component.dispatchEvent(未知源)，java.awt.Component.processMouseEvent(未知源)，java.awt.Component.processEvent(未知源)，java.awt.Container.processEvent(未知源)，java.awt.Component.dispatchEventImpl(未知源)，java.awt.Container.dispatchEventImpl(未知源)，java.awt.Component.dispatchEvent(未知源)，java.awt.Component.dispatchEvent(未知源)，java.awt.Component.processEvent(未知源)，java.awt.Container.processEvent(未知源)，java.awt.Component.dispatchEventImpl(未知源)，java.awt.Container.dispatchEventImpl(未知源)，java.awt.Component.dispatchEvent(未知源)，java.awt.Component.dispatchEvent(未知源)，java.awt.Component.processEvent(未知源)，java.awt.Container.processEvent(未知源)，java.awt.Component.dispatchEventImpl(未知源)，java.awt.Container.dispatchEventImpl(未知源)，java.awt.Component.dispatchEvent(未知源头)，java.awt.Component.dispatchEvent(未知源)，java.awt.Component.dispatchEvent(未知源)，java.awt.Component.processEvent(未知源)，java.awt.Container.processEvent(未知源)，java.awt.Component.dispatchEventImpl(在java.awt.LightweightDispatcher.processMouseEvent(Unknown来源)在java.awt.LightweightDispatcher.dispatchEvent(Unknown来源)在java.awt.Container.dispatchEventImpl(未知来源)在java.awt.Window.dispatchEventImpl(未知来源)在java.awt.Component.dispatchEvent(未知来源)在java.awt.EventQueue.dispatchEventImpl(未知来源)在java.awt.EventQueue.access$300(未知来源)在java.awt.EventQueue$3.运行(未知来源)在java。在java.awt.EventQueue$4.运行(未知源)在java.awt.EventQueue$4.运行(未知源)在java.security.AccessController.doPrivileged(Native方法(在java.security.AccessController.doPrivileged(Native方法)在java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown来源)在java.awt)。( java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown源) java.awt.EventDispatchThread.pumpEventsForFilter(Unknown源( java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown源)，java.awt.EventDispatchThread.pumpEvents(Unknown源( java.awt.EventDispatchThread.pumpEvents(Unknown源))EventQueue.dispatchEvent(未知源)，java.awt.EventDispatchThread.run(未知源)，由: java.lang.ClassNotFoundException: net.java.sip.communicator.impl.gui.main.account.NewAccountDialog引起org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1550) at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:77) at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1988) at java.lang.ClassLoader.loadClass(未知来源)的net.java.sip.communicator.plugin.simpleaccreg 155未找到. 37
回答 1
Stack Overflow用户
发布于 2016-04-22 07:14:02
Jiti使用带有Apache Client.So的OSGI框架，基本上，当您在build.xml上应用运行命令时，它将创建jars包。
现在，当类在编译时可用而在运行时不可用时，NoClassDefFoundError就会上升。因此，由于jars的打包--它们两个类都将在不同的jars.So中进行--这个错误会上升。
解决方案:现在，A类通过导入B级之外的内容引发猜测错误。
find Class A's parent package and search for its manifest file if you are not able to find its manifest file than go to parent of that package. Continue this steps until you find its manifest file.
In manifest file import package of Class B.
find Class B's parent package and search for its manifest file if you are not able to find its manifest file than go to parent of that package. Continue this steps until you find its manifest file.
In manifest file export package of Class B.
there are some rules for editing manifest file. So,before editing please read it .https://stackoverflow.com/questions/34171988
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