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 java.* package in JRE 1.8.0_191 rt.jar. Java source codes are also provided.

⏎ java/rmi/activation/ActivationMonitor.java

/*
 * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
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 *
 *
 *
 *
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 *
 */

package java.rmi.activation;

import java.rmi.MarshalledObject;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.rmi.activation.UnknownGroupException;
import java.rmi.activation.UnknownObjectException;

/**
 * An <code>ActivationMonitor</code> is specific to an
 * <code>ActivationGroup</code> and is obtained when a group is
 * reported active via a call to
 * <code>ActivationSystem.activeGroup</code> (this is done
 * internally). An activation group is responsible for informing its
 * <code>ActivationMonitor</code> when either: its objects become active or
 * inactive, or the group as a whole becomes inactive.
 *
 * @author      Ann Wollrath
 * @see         Activator
 * @see         ActivationSystem
 * @see         ActivationGroup
 * @since       1.2
 */
public interface ActivationMonitor extends Remote {

   /**
     * An activation group calls its monitor's
     * <code>inactiveObject</code> method when an object in its group
     * becomes inactive (deactivates).  An activation group discovers
     * that an object (that it participated in activating) in its VM
     * is no longer active, via calls to the activation group's
     * <code>inactiveObject</code> method. <p>
     *
     * The <code>inactiveObject</code> call informs the
     * <code>ActivationMonitor</code> that the remote object reference
     * it holds for the object with the activation identifier,
     * <code>id</code>, is no longer valid. The monitor considers the
     * reference associated with <code>id</code> as a stale reference.
     * Since the reference is considered stale, a subsequent
     * <code>activate</code> call for the same activation identifier
     * results in re-activating the remote object.<p>
     *
     * @param id the object's activation identifier
     * @exception UnknownObjectException if object is unknown
     * @exception RemoteException if remote call fails
     * @since 1.2
     */
    public void inactiveObject(ActivationID id)
        throws UnknownObjectException, RemoteException;

    /**
     * Informs that an object is now active. An <code>ActivationGroup</code>
     * informs its monitor if an object in its group becomes active by
     * other means than being activated directly (i.e., the object
     * is registered and "activated" itself).
     *
     * @param id the active object's id
     * @param obj the marshalled form of the object's stub
     * @exception UnknownObjectException if object is unknown
     * @exception RemoteException if remote call fails
     * @since 1.2
     */
    public void activeObject(ActivationID id,
                             MarshalledObject<? extends Remote> obj)
        throws UnknownObjectException, RemoteException;

    /**
     * Informs that the group is now inactive. The group will be
     * recreated upon a subsequent request to activate an object
     * within the group. A group becomes inactive when all objects
     * in the group report that they are inactive.
     *
     * @param id the group's id
     * @param incarnation the group's incarnation number
     * @exception UnknownGroupException if group is unknown
     * @exception RemoteException if remote call fails
     * @since 1.2
     */
    public void inactiveGroup(ActivationGroupID id,
                              long incarnation)
        throws UnknownGroupException, RemoteException;

}

⏎ java/rmi/activation/ActivationMonitor.java

Or download all of them as a single archive file:

File name: jre-rt-java-1.8.0_191-src.zip
File size: 6664831 bytes
Release date: 2018-10-28
Download 

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