JRE 8 rt.jar is the JAR file for JRE 8 RT (Runtime) libraries. JRE (Java Runtime) 8 is the runtime environment included in JDK 8. JRE 8 rt.jar libraries are divided into 6 packages:

com.* - Internal Oracle and Sun Microsystems libraries
java.* - Standard Java API libraries.
javax.* - Extended Java API libraries.
jdk.* -  JDK supporting libraries.
org.* - Third party libraries.
sun.* - Old libraries developed by Sun Microsystems.

JAR File Information:

Directory of C:\fyicenter\jdk-1.8.0_191\jre\lib
      63,596,151 rt.jar

Here is the list of Java classes of the com.* package in JRE 1.8.0_191 rt.jar. Java source codes are also provided.

⏎ com/sun/corba/se/impl/corba/AsynchInvoke.java

/*
 * Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */
/*
 * Licensed Materials - Property of IBM
 * RMI-IIOP v1.0
 * Copyright IBM Corp. 1998 1999  All Rights Reserved
 *
 */

package com.sun.corba.se.impl.corba;

import com.sun.corba.se.spi.orb.ORB ;

///////////////////////////////////////////////////////////////////////////
// helper class for deferred invocations

/*
 * The AsynchInvoke class allows for the support of asynchronous
 * invocations. Instances of these are created with a request object,
 * and when run, perform an invocation. The instance is also
 * responsible for waking up a client that might be waiting on the
 * 'get_response' method.
 */

public class AsynchInvoke implements Runnable {

    private RequestImpl _req;
    private ORB         _orb;
    private boolean     _notifyORB;

    public AsynchInvoke (ORB o, RequestImpl reqToInvokeOn, boolean n)
    {
        _orb = o;
        _req = reqToInvokeOn;
        _notifyORB = n;
    };


    /*
     * The run operation calls the invocation on the request object,
     * updates the RequestImpl state to indicate that the asynchronous
     * invocation is complete, and wakes up any client that might be
     * waiting on a 'get_response' call.
     *
     */

    public void run()
    {
        // do the actual invocation
        _req.doInvocation();

        // for the asynchronous case, note that the response has been
        // received.
        synchronized (_req)
            {
                // update local boolean indicator
                _req.gotResponse = true;

                // notify any client waiting on a 'get_response'
                _req.notify();
            }

        if (_notifyORB == true) {
            _orb.notifyORB() ;
        }
    }

};

///////////////////////////////////////////////////////////////////////////

⏎ com/sun/corba/se/impl/corba/AsynchInvoke.java

Or download all of them as a single archive file:

File name: jre-rt-com-1.8.0_191-src.zip
File size: 8099783 bytes
Release date: 2018-10-28
Download 

⇒ Backup JDK 8 Installation Directory

⇐ JRE 8 rt.jar - org.* Package Source Code

⇑ Download and Use JDK 8

⇑⇑ FAQ for JDK (Java Development Kit)