java.io.FileNotFoundException: c:\rt.jar\java.util.concurrent\Executors.class (The system cannot find the path specified) #1741

liudonghua123 · 2020-12-14T05:51:59Z

[provide a description of the issue]

Environment

Operating System: Microsoft Windows [Version 10.0.19042.685]
JDK version: java version "14.0.1" 2020-04-14
Visual Studio Code version: 1.52.0
Java extension version: v0.72.0

Steps To Reproduce

Create a simple Java project that contains some plain code like the following.

package com.liudonghua.demos;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.FutureTask;

/**
 * Hello world!
 */
public final class App {
    private App() {
    }

    /**
     * Says hello to the world.
     *
     * @param args The arguments of the program.
     * @throws ExecutionException
     * @throws InterruptedException
     */
    public static void main(String[] args) throws InterruptedException, ExecutionException {
        ExecutorService executor = Executors.newCachedThreadPool();
        MyTask task = new MyTask();
        System.out.println("主线程启动线程池");
        FutureTask<Integer> futureTask = new FutureTask<>(task);
        executor.submit(futureTask); // 作为Runnable传入submit()中
        System.out.println("主线程得到返回结果：" + futureTask.get()); // 作为Future获取结果
        executor.shutdown();
    }
}


/**
 * simple task.
 */
class MyTask implements Callable<Integer> {
    /**
     *
     */
    private static final int SLEEP_MILLIS = 1000;
    /**
     *
     */
    private static final int ROUND = 3;
    /**
     *
     */
    private static final int RETURN_VALUE = 100;

    @Override
    public Integer call() throws Exception {
        System.out.println("子线程开始计算...");
        for (int i = 0; i < ROUND; ++i) {
            Thread.sleep(SLEEP_MILLIS);
            System.out.println("子线程计算中，用时 " + (i + 1) + " 秒");
        }
        System.out.println("子线程计算完成，返回：100");
        return RETURN_VALUE;
    }
}

Ctrl+click some system classes like Executors.

Current Result

The empty window is shown. and some errors are shown in the output window.

java.io.FileNotFoundException: c:\rt.jar\java.util.concurrent\Executors.class (The system cannot find the path specified)

-----------------------------------------------------------------------------------------
	at java.base/java.io.FileInputStream.open0(Native Method)
	at java.base/java.io.FileInputStream.open(FileInputStream.java:212)
	at java.base/java.io.FileInputStream.<init>(FileInputStream.java:154)
	at de.fernflower.main.decompiler.ConsoleDecompiler.getBytecodeStream(Unknown Source)
	at cz.a(Unknown Source)
	at i.a(Unknown Source)
	at i.a(Unknown Source)
	at de.fernflower.main.decompiler.ConsoleDecompiler.addSpace(Unknown Source)
	at de.fernflower.main.decompiler.ConsoleDecompiler.main(Unknown Source)

-----------------------------------------------------------------------------------------
java.lang.NullPointerException
	at bW.a(Unknown Source)
	at bW.<init>(Unknown Source)
	at i.a(Unknown Source)
	at i.a(Unknown Source)
	at de.fernflower.main.decompiler.ConsoleDecompiler.addSpace(Unknown Source)
	at de.fernflower.main.decompiler.ConsoleDecompiler.main(Unknown Source)

-----------------------------------------------------------------------------------------

Expected Result

Navigation to system class source previewer.

Additional Informations

I can click the run/debug button around the main method. And the JAVA_HOME system env environment is configured correctly. And I also have a valid java configuration in vscode like the following.

  "java.home": "C:\\Program Files\\Java\\jdk-14.0.1",
  "java.configuration.runtimes": [
    {
      "name": "JavaSE-1.8",
      "path": "C:\\Program Files\\Java\\jdk1.8.0_152",
      "default": true
    },
    {
      "name": "JavaSE-14",
      "path": "C:\\Program Files\\Java\\jdk-14.0.1"
    }
  ],
  "java.maven.downloadSources": true

The text was updated successfully, but these errors were encountered:

liudonghua123 · 2020-12-14T06:24:32Z

I have tried to disable/enable, install/uninstall java related extension. And I couldn't found java.base similar configurations in vscode either.

testforstephen · 2020-12-14T11:32:38Z

The error is thrown by dgileadi.java-decompiler extension, would you disable it and try again?

liudonghua123 · 2020-12-15T01:46:58Z

@testforstephen Thanks for your tips, however, I checked that I have not installed this extension.

testforstephen · 2020-12-15T02:24:34Z

From the screenshot you provided, the error is from "MySQL" output, that's not contributed by Java extension.

Could you please share the Java log?
F1 -> Java: Open Java Language Server Log File

liudonghua123 · 2020-12-15T08:13:13Z

@testforstephen Hi, I cleaned up the log, reopen the project, and did the previous steps.

Here is log:

Java Language Server Log File

C:\Users\Liu.D.H\AppData\Roaming\Code\User\workspaceStorage\4997d6000ddf3a142f1affd6044b18fd\redhat.java\client.log.2020-12-15

{
  message: 'Starting Java server with: C:\\Program Files\\Java\\jdk-14.0.1\\bin\\java --add-modules=ALL-SYSTEM --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED -Declipse.application=org.eclipse.jdt.ls.core.id1 -Dosgi.bundles.defaultStartLevel=4 -Declipse.product=org.eclipse.jdt.ls.core.product -Dfile.encoding=utf8 -DwatchParentProcess=false -noverify -Xmx1G -XX:+UseG1GC -XX:+UseStringDeduplication -javaagent:c:\\Users\\Liu.D.H\\.vscode\\extensions\\gabrielbb.vscode-lombok-1.0.1\\server\\lombok.jar -jar c:\\Users\\Liu.D.H\\.vscode\\extensions\\redhat.java-0.72.0\\server\\plugins\\org.eclipse.equinox.launcher_1.6.0.v20200915-1508.jar -configuration c:\\Users\\Liu.D.H\\AppData\\Roaming\\Code\\User\\globalStorage\\redhat.java\\0.72.0\\config_ss_win -data c:\\Users\\Liu.D.H\\AppData\\Roaming\\Code\\User\\workspaceStorage\\4997d6000ddf3a142f1affd6044b18fd\\redhat.java\\ss_ws',
  level: 'info',
  timestamp: '2020-12-15 16:05:35.240'
}
{
  message: 'Starting Java server with: C:\\Program Files\\Java\\jdk-14.0.1\\bin\\java --add-modules=ALL-SYSTEM --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED -Declipse.application=org.eclipse.jdt.ls.core.id1 -Dosgi.bundles.defaultStartLevel=4 -Declipse.product=org.eclipse.jdt.ls.core.product -Dfile.encoding=utf8 -DwatchParentProcess=false -noverify -Xmx1G -XX:+UseG1GC -XX:+UseStringDeduplication -javaagent:c:\\Users\\Liu.D.H\\.vscode\\extensions\\gabrielbb.vscode-lombok-1.0.1\\server\\lombok.jar -jar c:\\Users\\Liu.D.H\\.vscode\\extensions\\redhat.java-0.72.0\\server\\plugins\\org.eclipse.equinox.launcher_1.6.0.v20200915-1508.jar -configuration c:\\Users\\Liu.D.H\\AppData\\Roaming\\Code\\User\\globalStorage\\redhat.java\\0.72.0\\config_win -data c:\\Users\\Liu.D.H\\AppData\\Roaming\\Code\\User\\workspaceStorage\\4997d6000ddf3a142f1affd6044b18fd\\redhat.java\\jdt_ws',
  level: 'info',
  timestamp: '2020-12-15 16:05:35.398'
}
{
  message: 'Java HotSpot(TM) 64-Bit Server VM warning: Options -Xverify:none and -noverify were deprecated in JDK 13 and will likely be removed in a future release.\n',
  level: 'info',
  timestamp: '2020-12-15 16:05:35.519'
}
{
  message: 'WARNING: Using incubator modules: jdk.incubator.foreign, jdk.incubator.jpackage\r\n',
  level: 'info',
  timestamp: '2020-12-15 16:05:36.287'
}
{
  message: 'Java HotSpot(TM) 64-Bit Server VM warning: Options -Xverify:none and -noverify were deprecated in JDK 13 and will likely be removed in a future release.\n' +
    'WARNING: Using incubator modules: jdk.incubator.jpackage, jdk.incubator.foreign\r\n',
  level: 'info',
  timestamp: '2020-12-15 16:05:36.287'
}
{
  message: '[Error - 4:06:07 PM] Dec 15, 2020, 4:06:07 PM Problems occurred when invoking code from plug-in: "com.microsoft.jdtls.ext.activator".\n' +
    "org.eclipse.lsp4j.jsonrpc.ResponseErrorException: Request workspace/executeClientCommand failed with message: command 'java.project.activate' not found\n" +
    "java.util.concurrent.CompletionException: org.eclipse.lsp4j.jsonrpc.ResponseErrorException: Request workspace/executeClientCommand failed with message: command 'java.project.activate' not found\r\n" +
    '\tat java.base/java.util.concurrent.CompletableFuture.reportJoin(CompletableFuture.java:412)\r\n' +
    '\tat java.base/java.util.concurrent.CompletableFuture.join(CompletableFuture.java:2108)\r\n' +
    '\tat org.eclipse.jdt.ls.core.internal.JavaClientConnection.executeClientCommand(JavaClientConnection.java:92)\r\n' +
    '\tat com.microsoft.jdtls.ext.activator.JdtlsExtActivator$1.done(JdtlsExtActivator.java:36)\r\n' +
    '\tat org.eclipse.core.internal.jobs.JobListeners.doNotify(JobListeners.java:73)\r\n' +
    '\tat org.eclipse.core.internal.jobs.JobListeners.done(JobListeners.java:118)\r\n' +
    '\tat org.eclipse.core.internal.jobs.JobManager.endJob(JobManager.java:702)\r\n' +
    '\tat org.eclipse.core.internal.jobs.WorkerPool.endJob(WorkerPool.java:117)\r\n' +
    '\tat org.eclipse.core.internal.jobs.Worker.run(Worker.java:83)\r\n' +
    "Caused by: org.eclipse.lsp4j.jsonrpc.ResponseErrorException: Request workspace/executeClientCommand failed with message: command 'java.project.activate' not found\r\n" +
    '\tat org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleResponse(RemoteEndpoint.java:209)\r\n' +
    '\tat org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:193)\r\n' +
    '\tat org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)\r\n' +
    '\tat org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)\r\n' +
    '\tat org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)\r\n' +
    '\tat java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)\r\n' +
    '\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)\r\n' +
    '\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)\r\n' +
    '\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)\r\n' +
    '\tat java.base/java.lang.Thread.run(Thread.java:832)\r\n',
  level: 'info',
  timestamp: '2020-12-15 16:06:07.244'
}

Java Extension Log File

C:\Users\Liu.D.H\AppData\Roaming\Code\User\workspaceStorage\4997d6000ddf3a142f1affd6044b18fd\redhat.java\jdt_ws\.metadata\.log

!SESSION 2020-12-15 16:05:36.418 -----------------------------------------------
eclipse.buildId=unknown
java.version=14.0.1
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Command-line arguments:  -data c:\Users\Liu.D.H\AppData\Roaming\Code\User\workspaceStorage\4997d6000ddf3a142f1affd6044b18fd\redhat.java\jdt_ws

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:42.187
!MESSAGE class org.eclipse.jdt.ls.core.internal.JavaLanguageServerPlugin is started

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:43.728
!MESSAGE Main thread is waiting

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:43.924
!MESSAGE >> initialize

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:43.943
!MESSAGE Initializing Java Language Server 0.66.0.202012031507

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:44.118
!MESSAGE Uninstalled reference:file:/c:/Users/Liu.D.H/.vscode/extensions/vscjava.vscode-java-dependency-0.15.0/server/com.microsoft.jdtls.ext.core-0.15.0.jar

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:44.132
!MESSAGE Installed reference:file:/c:/Users/Liu.D.H/.vscode/extensions/vscjava.vscode-java-dependency-0.16.0/server/com.microsoft.jdtls.ext.core-0.16.0.jar

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:44.690
!MESSAGE Uninstalled reference:file:/c:/Users/Liu.D.H/.vscode/extensions/vscjava.vscode-maven-0.26.0/jdtls.ext/com.microsoft.java.maven.plugin/target/com.microsoft.java.maven.plugin-0.26.0.jar

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:44.725
!MESSAGE Installed reference:file:/c:/Users/Liu.D.H/.vscode/extensions/vscjava.vscode-maven-0.27.0/jdtls.ext/com.microsoft.java.maven.plugin/target/com.microsoft.java.maven.plugin-0.27.0.jar

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:44.726
!MESSAGE Refresh the bundles

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:45.339
!MESSAGE >> registerWatchers'

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:45.346
!MESSAGE >> registerFeature 'workspace/didChangeWatchedFiles'

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.962
!MESSAGE Finished Refreshing bundles

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.966
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.970
!MESSAGE Non-Static Commands: [java.edit.organizeImports, java.project.refreshDiagnostics, java.project.import, java.project.removeFromSourcePath, java.project.listSourcePaths, java.project.provideSemanticTokens, java.project.resolveStackTraceLocation, java.project.getAll, java.project.isTestFile, java.project.getClasspaths, java.project.getSemanticTokensLegend, java.project.getSettings, java.project.updateSourceAttachment, java.project.resolveSourceAttachment, java.project.addToSourcePath]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.972
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.973
!MESSAGE Non-Static Commands: [vscode.java.test.search.codelens, vscode.java.test.search.items.all, vscode.java.test.search.location, vscode.java.test.search.items, vscode.java.test.get.testpath, vscode.java.test.junit.argument]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.974
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.976
!MESSAGE Non-Static Commands: [vscode.java.checkProjectSettings, vscode.java.isOnClasspath, vscode.java.fetchUsageData, vscode.java.validateLaunchConfig, vscode.java.resolveClassFilters, vscode.java.resolveMainMethod, vscode.java.resolveClasspath, vscode.java.resolveBuildFiles, vscode.java.resolveMainClass, vscode.java.updateDebugSettings, vscode.java.resolveSourceUri, vscode.java.fetchPlatformSettings, vscode.java.buildWorkspace, vscode.java.startDebugSession, vscode.java.inferLaunchCommandLength, vscode.java.resolveElementAtSelection, vscode.java.resolveJavaExecutable]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.978
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.979
!MESSAGE Non-Static Commands: [java.intellicode.completion, java.intellicode.completion.resolve, java.intellicode.enable]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.980
!MESSAGE Static Commands: [sts.java.addClasspathListener, sts.java.removeClasspathListener]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.981
!MESSAGE Non-Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.982
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.984
!MESSAGE Non-Static Commands: [sts.java.javadoc]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.988
!MESSAGE Static Commands: [sts.java.type]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.989
!MESSAGE Non-Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.990
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.992
!MESSAGE Non-Static Commands: [sts.java.javadocHoverLink]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.993
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.994
!MESSAGE Non-Static Commands: [sts.java.location]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.995
!MESSAGE Static Commands: [sts.java.search.packages, sts.java.search.types]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.997
!MESSAGE Non-Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:46.998
!MESSAGE Static Commands: [sts.java.hierarchy.supertypes, sts.java.hierarchy.subtypes]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:47.000
!MESSAGE Non-Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:47.006
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:47.008
!MESSAGE Non-Static Commands: [sts.java.code.completions]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:47.010
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:47.011
!MESSAGE Non-Static Commands: [java.maven.initializeSearcher, java.maven.searchArtifact, java.maven.addDependency, java.maven.controlContext]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:47.013
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:47.014
!MESSAGE Non-Static Commands: [java.project.refreshLib, java.project.list, java.project.generateJar, java.project.getMainClasses, java.getPackageData, java.resolvePath]

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:47.428
!MESSAGE >> initialized

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:49.821
!MESSAGE Importing Maven project(s)

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:56.179
!MESSAGE Workspace initialized in 9157ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:56.201
!MESSAGE >> initialization job finished

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:56.208
!MESSAGE >> workspace/didChangeConfiguration

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:56.568
!MESSAGE >> build jobs finished

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:56.774
!MESSAGE >> registerWatchers'

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:05:56.775
!MESSAGE >> watchers registered

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:03.831
!MESSAGE >> New configuration: {java={home=C:\Program Files\Java\jdk-14.0.1, jdt={ls={vmargs=-noverify -Xmx1G -XX:+UseG1GC -XX:+UseStringDeduplication -javaagent:"c:\Users\Liu.D.H\.vscode\extensions\gabrielbb.vscode-lombok-1.0.1\server\lombok.jar"}}, errors={incompleteClasspath={severity=ignore}}, configuration={checkProjectSettingsExclusions=true, updateBuildConfiguration=automatic, maven={userSettings=null, globalSettings=null}, runtimes=[{name=JavaSE-1.8, path=C:\Program Files\Java\jdk1.8.0_152, default=true}, {name=JavaSE-14, path=C:\Program Files\Java\jdk-14.0.1}]}, trace={server=off}, import={maven={enabled=true}, gradle={enabled=true, wrapper={enabled=true}, version=null, home=null, java={home=C:\Program Files\Java\jdk-14.0.1}, offline={enabled=false}, arguments=null, jvmArguments=null, user={home=null}}, exclusions=[**/node_modules/**, **/.metadata/**, **/archetype-resources/**, **/META-INF/maven/**, **/src/main/resources/templates/**]}, maven={downloadSources=false, updateSnapshots=false}, referencesCodeLens={enabled=false}, signatureHelp={enabled=false}, implementationsCodeLens={enabled=false}, format={enabled=true, settings={url=https://raw.githubusercontent.com/google/styleguide/gh-pages/eclipse-java-google-style.xml, profile=GoogleStyle}, comments={enabled=true}, onType={enabled=true}}, saveActions={organizeImports=false}, project={referencedLibraries=[lib/**/*.jar], importOnFirstTimeStartup=automatic, importHint=true, resourceFilters=[node_modules, .git], exportJar={targetPath=${workspaceFolder}/${workspaceFolderBasename}.jar}}, contentProvider={preferred=null}, autobuild={enabled=true}, maxConcurrentBuilds=1.0, completion={maxResults=0.0, enabled=true, overwrite=true, guessMethodArguments=false, favoriteStaticMembers=[org.junit.Assert.*, org.junit.Assume.*, org.junit.jupiter.api.Assertions.*, org.junit.jupiter.api.Assumptions.*, org.junit.jupiter.api.DynamicContainer.*, org.junit.jupiter.api.DynamicTest.*, org.mockito.Mockito.*, org.mockito.ArgumentMatchers.*, org.mockito.Answers.*], filteredTypes=[java.awt.*, com.sun.*], importOrder=[java, javax, com, org]}, foldingRange={enabled=true}, progressReports={enabled=true}, codeGeneration={hashCodeEquals={useJava7Objects=false, useInstanceof=false}, useBlocks=false, generateComments=false, toString={template=${object.className} [${member.name()}=${member.value}, ${otherMembers}], codeStyle=STRING_CONCATENATION, skipNullValues=false, listArrayContents=true, limitElements=0.0}}, selectionRange={enabled=true}, showBuildStatusOnStart={enabled=false}, server={launchMode=Hybrid}, sources={organizeImports={starThreshold=99.0, staticStarThreshold=99.0}}, semanticHighlighting={enabled=true}, refactor={renameFromFileExplorer=prompt}, imports={gradle={wrapper={checksums=[{sha256=16caeaf66d57a0d1d2087fef6a97efa62de8da69afa5b908f40db35afc4342da, allowed=false}]}}}, templates={fileHeader=[], typeComment=[]}, references={includeAccessors=true}, debug={logLevel=warn, settings={showHex=false, showStaticVariables=false, showQualifiedNames=false, showLogicalStructure=true, showToString=true, maxStringLength=0.0, numericPrecision=0.0, hotCodeReplace=auto, enableRunDebugCodeLens=true, forceBuildBeforeLaunch=true, onBuildFailureProceed=false, console=integratedTerminal, exceptionBreakpoint={skipClasses=[]}, stepping={skipClasses=[], skipSynthetics=false, skipStaticInitializers=false, skipConstructors=false}, jdwp={limitOfVariablesPerJdwpRequest=100.0, requestTimeout=3000.0}, vmArgs=}}, dependency={showMembers=false, syncWithFolderExplorer=true, autoRefresh=true, refreshDelay=2000.0, packagePresentation=flat}, help={firstView=auto, showReleaseNotes=true}, test={report={showAfterExecution=onFailure, position=sideView}, editor={enableShortcuts=true}, log={level=info}, message={hintForDeprecatedConfig=true, hintForSetingDefaultConfig=true}, defaultConfig=, config={}}, requirements={JDK11Warning=false}}}

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:03.841
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:07.176
!MESSAGE >> workspace/executeCommand java.intellicode.enable

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:07.181
!MESSAGE >> workspace/executeCommand java.project.getAll

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:07.182
!MESSAGE >> workspace/executeCommand java.project.getSemanticTokensLegend

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:07.184
!MESSAGE >> workspace/executeCommand vscode.java.test.get.testpath

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:07.185
!MESSAGE >> workspace/executeCommand vscode.java.test.get.testpath

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:07.187
!MESSAGE >> document/foldingRange

!ENTRY com.microsoft.jdtls.ext.activator 4 2 2020-12-15 16:06:07.188
!MESSAGE Problems occurred when invoking code from plug-in: "com.microsoft.jdtls.ext.activator".
!STACK 0
java.util.concurrent.CompletionException: org.eclipse.lsp4j.jsonrpc.ResponseErrorException: Request workspace/executeClientCommand failed with message: command 'java.project.activate' not found
	at java.base/java.util.concurrent.CompletableFuture.reportJoin(CompletableFuture.java:412)
	at java.base/java.util.concurrent.CompletableFuture.join(CompletableFuture.java:2108)
	at org.eclipse.jdt.ls.core.internal.JavaClientConnection.executeClientCommand(JavaClientConnection.java:92)
	at com.microsoft.jdtls.ext.activator.JdtlsExtActivator$1.done(JdtlsExtActivator.java:36)
	at org.eclipse.core.internal.jobs.JobListeners.doNotify(JobListeners.java:73)
	at org.eclipse.core.internal.jobs.JobListeners.done(JobListeners.java:118)
	at org.eclipse.core.internal.jobs.JobManager.endJob(JobManager.java:702)
	at org.eclipse.core.internal.jobs.WorkerPool.endJob(WorkerPool.java:117)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:83)
Caused by: org.eclipse.lsp4j.jsonrpc.ResponseErrorException: Request workspace/executeClientCommand failed with message: command 'java.project.activate' not found
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleResponse(RemoteEndpoint.java:209)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:193)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
	at java.base/java.lang.Thread.run(Thread.java:832)

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:07.243
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:07.245
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:07.247
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:07.248
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:07.577
!MESSAGE Reconciled 0. Took 1 ms

!ENTRY java-debug 1 0 2020-12-15 16:06:08.646
!MESSAGE Starting com.microsoft.java.debug.plugin

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:10.707
!MESSAGE begin problem for /App.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:10.709
!MESSAGE 0 problems reported for /App.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:10.715
!MESSAGE Validated 1. Took 2671 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:46.757
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:46.975
!MESSAGE >> workspace/executeCommand java.maven.initializeSearcher

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:46.976
!MESSAGE >> workspace/executeCommand java.project.getSettings

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:46.978
!MESSAGE >> document/documentSymbol

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:46.980
!MESSAGE >> document/foldingRange

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:46.989
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:46.991
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:48.310
!MESSAGE >> document/hover

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:50.080
!MESSAGE >> document/hover

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:50.476
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:50.586
!MESSAGE >> document/hover

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:50.592
!MESSAGE >> java/classFileContents

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:50.619
!MESSAGE ClassFile contents request completed

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:50.674
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:50.677
!MESSAGE >> document/didClose

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:52.245
!MESSAGE >> document/documentSymbol

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:52.280
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:52.493
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:52.495
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:52.543
!MESSAGE >> document/hover

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:52.903
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:52.917
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:53.144
!MESSAGE >> workspace/executeCommand sts.java.addClasspathListener

!ENTRY org.eclipse.jdt.ls.core 1 0 2020-12-15 16:06:53.857
!MESSAGE >> document/documentHighlight

maoziliang · 2020-12-16T11:17:25Z

我也碰到了相同的问题，现在解决了。

发现是cweijan.vscode-office这个插件导致的。

有两种解决方法

禁用掉cweijan.vscode-office插件

配置*.class的打开方式

"workbench.editorAssociations": [
    {
      "viewType": "default",
      "filenamePattern": "*.class"
    }
]

liudonghua123 · 2020-12-16T12:08:01Z

@maoziliang Thanks, it works for me. I think it is maybe an issue of cweijan.vscode-office extension.

testforstephen · 2020-12-16T12:16:03Z

Thank you for figuring this out. I will close this issue now. You'd better to open an issue against cweijan.vscode-office extension.

testforstephen closed this as completed Dec 16, 2020

testforstephen added the caused-by-extension label Dec 16, 2020

testforstephen mentioned this issue Dec 16, 2020

[Bug]when you go to the define of a class, you will get NPE error microsoft/vscode-java-pack#506

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java.io.FileNotFoundException: c:\rt.jar\java.util.concurrent\Executors.class (The system cannot find the path specified) #1741

liudonghua123 commented Dec 14, 2020

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