有没有人成功让eclipse.jdt.ls在emacs上工作的？
由于我自己编译，在某一步遇到了handshake_failure的错误，于是就从这里下载了编译好的版本。
以下错误不管是snapshots还是milestone都遇到了：
我把tar.gz按AUR的方法(我在ubuntu上安装的)解压到$HOME/.local/share/java/jdtls下，并把AUR中的launcher.sh保存成了$HOME/.local/bin/jdtls(当然修改了对应路径)。
对于eglot，我直接设置成(java-mode . ("~/.local/bin/jdtls"))。
打开一个.java之后，eglot会显示它链接server成功，不过，eglot在mode-line很快就会显示error，并且当我尝试用xref-find-defination一个局部变量的定义时，jsonrpc会返回一个空指针的异常。。。
试试lsp-java吧，开箱即用
lsp-java + dap-java ，打开就能用啊
我试了一下meghanada，报的错是com.sun.tools.javac.tree某个类找不到。估计jdtls也是类似的原因。
我用jdeps扫了一下缺什么包，meghanada没被扫出来，然而jdtls缺的包巨多，有什么方法根据jdeps的结果安装包吗？
用lsp-java吧，脏活都帮你搞定了。
看了下是用maven安装的
我现在使用了lsp-java，当我打开一个有.project的项目下的文件时，为什么lsp-java还说此文件不属于某个项目？这个不是自动检测的吗？
原来是叫你选。。。
出了和我用AUR+eglot一样的错误：
java.lang.NullPointerException
at org.eclipse.jdt.internal.compiler.util.JRTUtil.walkModuleImage(JRTUtil.java:158)
at org.eclipse.jdt.internal.core.JavaProject.loadModulesInJimage(JavaProject.java:926)
at org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(JavaProject.java:726)
at org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(JavaProject.java:1046)
at org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(JavaProject.java:991)
at org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(JavaProject.java:968)
at org.eclipse.jdt.internal.core.JavaProject.buildStructure(JavaProject.java:482)
at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:268)
at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:596)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:326)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:312)
at org.eclipse.jdt.internal.core.JavaElement.getChildren(JavaElement.java:267)
at org.eclipse.jdt.internal.core.JavaProject.getPackageFragmentRoots(JavaProject.java:2274)
at org.eclipse.jdt.internal.core.JavaProject.getPackageFragments(JavaProject.java:2298)
at org.eclipse.jdt.ls.core.internal.managers.ProjectsManager.cleanupResources(ProjectsManager.java:217)
at org.eclipse.jdt.ls.core.internal.managers.ProjectsManager.initializeProjects(ProjectsManager.java:137)
at org.eclipse.jdt.ls.core.internal.handlers.InitHandler$1.runInWorkspace(InitHandler.java:246)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:42)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
java.lang.NullPointerException
at org.eclipse.jdt.internal.compiler.util.JRTUtil.walkModuleImage(JRTUtil.java:158)
at org.eclipse.jdt.internal.core.JavaProject.loadModulesInJimage(JavaProject.java:926)
at org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(JavaProject.java:726)
at org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(JavaProject.java:1046)
at org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(JavaProject.java:991)
at org.eclipse.jdt.internal.core.JavaProject.computePackageFragmentRoots(JavaProject.java:968)
at org.eclipse.jdt.internal.core.JavaProject.buildStructure(JavaProject.java:482)
at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:268)
at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:596)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:326)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:312)
at org.eclipse.jdt.internal.core.JavaProject.getModuleDescription(JavaProject.java:3718)
at org.eclipse.jdt.internal.core.builder.NameEnvironment.computeClasspathLocations(NameEnvironment.java:128)
at org.eclipse.jdt.internal.core.builder.NameEnvironment.<init>(NameEnvironment.java:62)
at org.eclipse.jdt.internal.core.builder.JavaBuilder.initializeBuilder(JavaBuilder.java:629)
at org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:174)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:833)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:220)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:263)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:316)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:319)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:371)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:392)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:154)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:244)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
java.lang.NullPointerException
at org.eclipse.jdt.internal.compiler.util.JRTUtil.walkModuleImage(JRTUtil.java:158)
at org.eclipse.jdt.internal.core.search.indexing.AddJrtToIndex.execute(AddJrtToIndex.java:268)
at org.eclipse.jdt.internal.core.search.processing.JobManager.run(JobManager.java:401)
at java.lang.Thread.run(java.base@9-internal/Thread.java:804)
我用jdeps扫了一下，还是有没找到的包。。。
喷了，我在我自己电脑上(archlinux)，按我主贴的方法用eglot，一下子就好了。。。
可能是服务器(ubuntu)的jvm有什么问题。。。