Sometime if i play the game this window diseapear (Has somebody an idea what this is and how I can fix this)
Exception in thread "AWT-EventQueue-0" java.lang.ClassFormatError: Unknown constant tag 13 in class file javax/swing/plaf/basic/BasicToolTipUI at java.lang.ClassLoader.findBootstrapClass(Native Method) at java.lang.ClassLoader.findBootstrapClassOrNull(ClassLoader.java:1061) at java.lang.ClassLoader.loadClass(ClassLoader.java:412) at java.lang.ClassLoader.loadClass(ClassLoader.java:410) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:356) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:1871) at javax.swing.UIDefaults.getUIClass(UIDefaults.java:683) at javax.swing.UIDefaults.getUI(UIDefaults.java:755) at javax.swing.UIManager.getUI(UIManager.java:1002) at javax.swing.JToolTip.updateUI(JToolTip.java:100) at javax.swing.JToolTip.<init>(JToolTip.java:82) at javax.swing.JComponent.createToolTip(JComponent.java:3075) at javax.swing.ToolTipManager.showTipWindow(ToolTipManager.java:251) at javax.swing.ToolTipManager$insideTimerAction.actionPerformed(ToolTipManager.java:635) at javax.swing.Timer.fireActionPerformed(Timer.java:312) at javax.swing.Timer$DoPostEvent.run(Timer.java:244) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705) at java.awt.EventQueue.access$000(EventQueue.java:101) at java.awt.EventQueue$3.run(EventQueue.java:666) at java.awt.EventQueue$3.run(EventQueue.java:664) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:675) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105) at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)