JDK 11 jdk.management.jmod is the JMOD file for JDK 11 Management module.

JDK 11 Management module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.management.jmod.

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

JDK 11 Management module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.management.

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

⏎ com/sun/management/internal/OperatingSystemImpl.java

/*
 * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package com.sun.management.internal;

import com.sun.management.OperatingSystemMXBean;
import sun.management.BaseOperatingSystemImpl;
import sun.management.VMManagement;

/**
 * Implementation class for the operating system.
 * Standard and committed hotspot-specific metrics if any.
 *
 * ManagementFactory.getOperatingSystemMXBean() returns an instance
 * of this class.
 */
class OperatingSystemImpl extends BaseOperatingSystemImpl
    implements OperatingSystemMXBean {

    // psapiLock is a lock to make sure only one thread loading
    // PSAPI DLL.
    private static Object psapiLock = new Object();

    OperatingSystemImpl(VMManagement vm) {
        super(vm);
    }

    @Override
    public long getCommittedVirtualMemorySize() {
        synchronized (psapiLock) {
            return getCommittedVirtualMemorySize0();
        }
    }

    @Override
    public long getTotalSwapSpaceSize() {
        return getTotalSwapSpaceSize0();
    }

    @Override
    public long getFreeSwapSpaceSize() {
        return getFreeSwapSpaceSize0();
    }

    @Override
    public long getProcessCpuTime() {
        return getProcessCpuTime0();
    }

    @Override
    public long getFreePhysicalMemorySize() {
        return getFreePhysicalMemorySize0();
    }

    @Override
    public long getTotalPhysicalMemorySize() {
        return getTotalPhysicalMemorySize0();
    }

    @Override
    public double getSystemCpuLoad() {
        return getSystemCpuLoad0();
    }

    @Override
    public double getProcessCpuLoad() {
        return getProcessCpuLoad0();
    }

    /* native methods */
    private native long getCommittedVirtualMemorySize0();
    private native long getFreePhysicalMemorySize0();
    private native long getFreeSwapSpaceSize0();
    private native double getProcessCpuLoad0();
    private native long getProcessCpuTime0();
    private native double getSystemCpuLoad0();
    private native long getTotalPhysicalMemorySize0();
    private native long getTotalSwapSpaceSize0();

    static {
        initialize0();
    }

    private static native void initialize0();
}

⏎ com/sun/management/internal/OperatingSystemImpl.java

Or download all of them as a single archive file:

File name: jdk.management-11.0.1-src.zip
File size: 38186 bytes
Release date: 2018-11-04
Download 

⇒ JDK 11 jdk.management.agent.jmod - Management Agent Module

⇐ JDK 11 jdk.localedata.jmod - Locale Data Module

⇑ Download and Use JDK 11

⇑⇑ FAQ for JDK (Java Development Kit)