java-9

问题 Trying to run a fairly old project Mamute with Java 9. I was able to get around some initial errors by using --add-modules java.xml.bind but Mamute uses an older version of Jetty (8.1.0.v20120127) and I am seeing PWC6188: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved This discussion around this thread would seem to indicate using Jetty with Java 9 is only possible with back-ported code changes and not by changing configuration. Is that correct? 回答1: To what I've

问题 I am having trouble using Ignite on JDK 9. I have the following minimal testcase: package no.ovstetun.ignite; import org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi; import org.junit.Test; public class FailingIgniteTest { @Test public void failingIgnite() { TcpDiscoverySpi discoverySpi = new TcpDiscoverySpi(); } } This code sample fails with the following stacktrace: java.lang.ExceptionInInitializerError at org.apache.ignite.internal.util.IgniteUtils.<clinit>(IgniteUtils.java:769) at org

问题 I would like to create multi-release jar (for Java 8 and Java 9) by jar command. There are several Netbeans IDE projects: com.jdojo.mrjar.jdk8, com.jdojo.mrjar.jdk9. Projects source code is here. Using command line I go to a parent folder and run command. When I try to do this: jar --create --file mrjars/com.jdojo.mrjar.jar -C com.jdojo.mrjar.jdk8/build/classes . --release 9 -C com.jdojo.mrjar.jdk9/build/classes . I get a message: Warning: entry META-INF/versions/9/.netbeans_automatic_build

问题 While learning and exploring Java 9 from eclipse. I create a simple project in eclipse, Although when I compile the project, it prints the program's expected result but along following exception too. Could not instrument class mymodule/App: java.lang.IllegalArgumentException at org.eclipse.jdt.launching.internal.org.objectweb.asm.ClassReader.<init>(Unknown Source) at org.eclipse.jdt.launching.internal.weaving.ClassfileTransformer.transform(ClassfileTransformer.java:25) at org.eclipse.jdt

问题 Why does my jshell instance (JDK Version 9-ea) unable to identify printf() statement ? Below is the error I observe, jshell> printf("Print number one - %d",1) | Error: | cannot find symbol | symbol: method printf(java.lang.String,int) | printf("Print number one - %d",1) | ^----^ I am able to access printf, provided I specify it in a regular way. jshell> System.out.printf("Print number one - %d",1) Print number one - 1$1 ==> java.io.PrintStream@1efbd816 Any pointers? 回答1: An earlier version of

问题 This question already has answers here : JDK9: An illegal reflective access operation has occurred. org.python.core.PySystemState (7 answers) Closed last year . I use Spring Boot 2.0.0.RC1, JDK 9.0.4, IntelliJ IDEA 2017.3.4 Ultimate, Gradle 4.5.1 . Spring Boot RC1 version (strictly, Spring Framework 5.0.3.RELEASE) has a known issue: https://jira.spring.io/browse/SPR-15859 , I also see it at here https://github.com/dsyer/spring-boot-java-9#create-a-spring-boot-application Spring developer

问题 I'm using Eclipse 4.7.3a with Tomcat 9.0.4 in the IDE. I upgraded from Java 8 to Java 10. I changed my JAVA_HOME to point to the JDK 10 installation. I went into Eclipse and created a new JDK installed JRE pointing at the Java 10 JDK, and selected it. I rebuilt my project, and tried to start the Tomcat server I had. It said: -Djava.endorsed.dirs=C:\bin\tomcat\endorsed is not supported. Endorsed standards and standalone APIs in modular form will be supported via the concept of upgradeable

问题 Using the code: ModuleFinder.of(Paths.get(path)).findAll() I am able to retrieve a Set<ModuleReference> of all the .jars in the path folder. My next step would be getting a Module from a ModuleReference but there's no method that returns that, I can get a ModuleDescriptor but even that one doesn't help. Is there a way to do this? 回答1: If you desire to access the module content you should open the ModuleReference that you've attained. This would provide you access to the ModuleReader which is

问题 When using Undertow 1.4.20 (as embedded Servlet engine), i get this exception when running our app under Java 9.=: java.lang.ClassNotFoundException: sun.misc.Cleaner Cause is this line in io.undertow.server.DirectByteBufferDeallocator : tmpCleanerClean = Class.forName("sun.misc.Cleaner").getMethod("clean"); This class does indeed not exists anymore in Java 9. But a replacement is available: java.lang.ref.Cleaner Can i ignore this exception for now? Is there a timeline for fixing this (i.e.

问题 I've got a classloader problem with Java 9. This code worked with previous Java versions: private static void addNewURL(URL u) throws IOException { final Class[] newParameters = new Class[]{URL.class}; URLClassLoader urlClassLoader = (URLClassLoader) ClassLoader.getSystemClassLoader(); Class newClass = URLClassLoader.class; try { Method method = newClass.getDeclaredMethod("addNewURL", newParameters ); method.setAccessible(true); method.invoke(urlClassLoader, new Object[]{u}); } catch