Applet错误-java.lang.NoClassDefFoundError：sun / misc / ProxyGenerator

Question

I am running an applet from browser and am getting error:

    sun/misc/ProxyGenerator
java.lang.NoClassDefFoundError: sun/misc/ProxyGenerator
    at java.lang.reflect.Proxy$ProxyClassFactory.apply(Unknown Source)
    at java.lang.reflect.Proxy$ProxyClassFactory.apply(Unknown Source)
    at java.lang.reflect.WeakCache$Factory.get(Unknown Source)
    at java.lang.reflect.WeakCache.get(Unknown Source)
    at java.lang.reflect.Proxy.getProxyClass0(Unknown Source)
    at java.lang.reflect.Proxy.newProxyInstance(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.annotationForMap(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotation(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations2(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations(Unknown Source)
    at java.lang.Class.initAnnotationsIfNecessary(Unknown Source)
    at java.lang.Class.getAnnotation(Unknown Source)
    at sun.reflect.annotation.AnnotationType.<init>(Unknown Source)
    at sun.reflect.annotation.AnnotationType.getInstance(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotation(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations2(Unknown Source)
    at sun.reflect.annotation.AnnotationParser.parseAnnotations(Unknown Source)
    at java.lang.Class.initAnnotationsIfNecessary(Unknown Source)
    at java.lang.Class.getAnnotation(Unknown Source)
    at com.thoughtworks.xstream.mapper.AnnotationMapper$UnprocessedTypesSet.add(AnnotationMapper.java:481)
    at com.thoughtworks.xstream.mapper.AnnotationMapper$UnprocessedTypesSet.add(AnnotationMapper.java:466)
    at com.thoughtworks.xstream.mapper.AnnotationMapper.processAnnotations(AnnotationMapper.java:142)
    at com.thoughtworks.xstream.XStream.processAnnotations(XStream.java:1576)
    at com.thoughtworks.xstream.XStream.processAnnotations(XStream.java:1587)
    at com.plugin.PluginReader.getOptionalColumnsPluginPOJO(PluginReader.java:242)
    at com.applet.GUIValuesApplet.getOptionalColumns(GUIValuesApplet.java:177)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at sun.plugin.javascript.Trampoline.invoke(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at sun.plugin.javascript.JSClassLoader.invoke(Unknown Source)
    at sun.plugin2.liveconnect.JavaClass$MethodInfo.invoke(Unknown Source)
    at sun.plugin2.liveconnect.JavaClass$MemberBundle.invoke(Unknown Source)
    at sun.plugin2.liveconnect.JavaClass.invoke0(Unknown Source)
    at sun.plugin2.liveconnect.JavaClass.invoke(Unknown Source)
    at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$DefaultInvocationDelegate.invoke(Unknown Source)
    at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo.doObjectOp(Unknown Source)
    at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$LiveConnectWorker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

If I run this applet from eclipse, it runs fine. I suspect there may be issue with jre version or accessing rt.jar in jre runtime. This is not code related issue for sure as everything was working until my system got restarted (it reboots per company policy on weekend). Therefore, any setting may have been changed.

Browser used: Chrome latest version of jre on machine: jre7 code compiled using: jre6

Kindly respond as I have been facing this issue for long time now.

UPDATE: Just to add, I get this error when I try to read xml file to Java class using annotaions in thoughtworks xstream lib

Answer 1

sun.misc is a vendor specific class which should not be used in portable Java code.

Either make the code portable or switch the browser plugin to the Oracle JVM.

Answer 2

Looks my jre installation got corrupt. I reinstalled it and it fixed the issue.