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  1. ,
    Expert tip

    The server rejects all jars that already belong to the server runtime (such as tomcat-**.jar, servlet**.jar). Consider substituting the CORS filter you're using for this one: https://goo.gl/ctQ7Fs

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    This is thrown when the Java Virtual Machine (JVM) tries to load a particular class and the specified class cannot be found in the classpath. Make sure poi-ooxml library jar is added to your project's build path and you are using the latest version.

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via Oracle Community by 807549, 1 year ago
javaxswing.plaf.windows.WindowsLookAndFeel
java.lang.ClassNotFoundException: javaxswing.plaf.windows.WindowsLookAndFeel at java.net.URLClassLoader$1.run(URLClassLoader.java:198) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:186) at java.lang.ClassLoader.loadClass(ClassLoader.java:299) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265) at java.lang.ClassLoader.loadClass(ClassLoader.java:255) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:217) at javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:1659) at javax.swing.UIManager.setLookAndFeel(UIManager.java:423) at PlafPanel$1.actionPerformed(PlafTest.java:76) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1764) at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1817) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:419) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245) at java.awt.Component.processMouseEvent(Component.java:5093) at java.awt.Component.processEvent(Component.java:4890) at java.awt.Container.processEvent(Container.java:1566) at java.awt.Component.dispatchEventImpl(Component.java:3598) at java.awt.Container.dispatchEventImpl(Container.java:1623) at java.awt.Component.dispatchEvent(Component.java:3439) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3165) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095) at java.awt.Container.dispatchEventImpl(Container.java:1609) at java.awt.Window.dispatchEventImpl(Window.java:1585) at java.awt.Component.dispatchEvent(Component.java:3439) at java.awt.EventQueue.dispatchEvent(EventQueue.java:450) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136) at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)