JDK 11 jdk.jconsole.jmod is the JMOD file for JDK 11 JConsole tool, which can be invoked by the "jconsole" command.

JDK 11 JConsole tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.jconsole.jmod.

JDK 11 JConsole tool compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 JConsole tool source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.jconsole.

You can click and view the content of each source code file in the list below.

⏎ sun/tools/jconsole/Worker.java

/*
 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package sun.tools.jconsole;

import java.util.*;

public class Worker extends Thread {
    ArrayList<Runnable> jobs = new ArrayList<Runnable>();
    private boolean stopped = false;

    public Worker(String name) {
        super("Worker-"+name);

        setPriority(NORM_PRIORITY - 1);
    }

    public void run() {
        while (!isStopped()) {
            Runnable job;
            synchronized(jobs) {
                while (!isStopped() && jobs.size() == 0) {
                    try {
                        jobs.wait();
                    } catch (InterruptedException ex) {
                    }
                }

                if(isStopped()) break;

                job = jobs.remove(0);
            }
            job.run();
        }
    }

    private synchronized boolean isStopped() {
        return stopped;
    }

    public synchronized void stopWorker() {
        stopped = true;
        synchronized(jobs) {
            jobs.notify();
        }
    }

    public void add(Runnable job) {
        synchronized(jobs) {
            jobs.add(job);
            jobs.notify();
        }
    }

    public boolean queueFull() {
        synchronized(jobs) {
            return (jobs.size() > 0);
        }
    }
}

⏎ sun/tools/jconsole/Worker.java

Or download all of them as a single archive file:

File name: jdk.jconsole-11.0.1-src.zip
File size: 164713 bytes
Release date: 2018-11-04
Download 

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