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

[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

1. 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;
    }
}

1. 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

[maoziliang]

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

1. 禁用掉cweijan.vscode-office插件
2. 配置*.class的打开方式

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

[testforstephen]

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