Are you sure this works? I tried it and I get:
ce lucee.runtime.exp.NativeException: class java.lang.Runnable is invalid or doesn't exist
at lucee.commons.lang.PhysicalClassLoader.findClass(PhysicalClassLoader.java:146)
at lucee.commons.lang.PhysicalClassLoader.loadClass(PhysicalClassLoader.java:127)
at lucee.commons.lang.PhysicalClassLoader.loadClass(PhysicalClassLoader.java:107)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.lang.ClassLoader.defineClass(ClassLoader.java:642)
at lucee.commons.lang.PhysicalClassLoader._loadClass(PhysicalClassLoader.java:163)
at lucee.commons.lang.PhysicalClassLoader.loadClass(PhysicalClassLoader.java:158)
at lucee.transformer.bytecode.util.JavaProxyFactory.createProxy(JavaProxyFactory.java:311)
at lucee.runtime.functions.other.CreateDynamicProxy._call(CreateDynamicProxy.java:95)
at lucee.runtime.functions.other.CreateDynamicProxy.call(CreateDynamicProxy.java:44)
at java_executor_test_cfm855$cf.call(/java-executor-test.cfm:8)
at lucee.runtime.PageContextImpl._doInclude(PageContextImpl.java:904)
at lucee.runtime.PageContextImpl.doInclude(PageContextImpl.java:819)
at lucee.runtime.PageContextImpl.doInclude(PageContextImpl.java:814)
at lucee.runtime.PageContextImpl.doInclude(PageContextImpl.java:805)
at application_cfc$cf.udfCall(/Application.cfc:6)
at lucee.runtime.type.UDFImpl.implementation(UDFImpl.java:105)
at lucee.runtime.type.UDFImpl._call(UDFImpl.java:337)
at lucee.runtime.type.UDFImpl.call(UDFImpl.java:224)
at lucee.runtime.ComponentImpl._call(ComponentImpl.java:697)
at lucee.runtime.ComponentImpl._call(ComponentImpl.java:580)
at lucee.runtime.ComponentImpl.call(ComponentImpl.java:1903)
at lucee.runtime.listener.ModernAppListener.call(ModernAppListener.java:422)
at lucee.runtime.listener.ModernAppListener._onRequest(ModernAppListener.java:224)
at lucee.runtime.listener.MixedAppListener.onRequest(MixedAppListener.java:43)
at lucee.runtime.PageContextImpl.execute(PageContextImpl.java:2265)
at lucee.runtime.PageContextImpl._execute(PageContextImpl.java:2257)
at lucee.runtime.PageContextImpl.executeCFML(PageContextImpl.java:2225)
at lucee.runtime.engine.CFMLEngineImpl.serviceCFML(CFMLEngineImpl.java:881)
at lucee.loader.engine.CFMLEngineWrapper.serviceCFML(CFMLEngineWrapper.java:102)
at lucee.loader.servlet.CFMLServlet.service(CFMLServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2508)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2497)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)