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/beans/beancontext/BeanContextServiceRevokedEvent.java

/*
 * Copyright (c) 1998, 2009, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package java.beans.beancontext;

import java.beans.beancontext.BeanContextEvent;

import java.beans.beancontext.BeanContextServices;

/**
 * <p>
 * This event type is used by the
 * <code>BeanContextServiceRevokedListener</code> in order to
 * identify the service being revoked.
 * </p>
 */
public class BeanContextServiceRevokedEvent extends BeanContextEvent {
    private static final long serialVersionUID = -1295543154724961754L;

    /**
     * Construct a <code>BeanContextServiceEvent</code>.
     * @param bcs the <code>BeanContextServices</code>
     * from which this service is being revoked
     * @param sc the service that is being revoked
     * @param invalidate <code>true</code> for immediate revocation
     */
    public BeanContextServiceRevokedEvent(BeanContextServices bcs, Class sc, boolean invalidate) {
        super((BeanContext)bcs);

        serviceClass    = sc;
        invalidateRefs  = invalidate;
    }

    /**
     * Gets the source as a reference of type <code>BeanContextServices</code>
     * @return the <code>BeanContextServices</code> from which
     * this service is being revoked
     */
    public BeanContextServices getSourceAsBeanContextServices() {
        return (BeanContextServices)getBeanContext();
    }

    /**
     * Gets the service class that is the subject of this notification
     * @return A <code>Class</code> reference to the
     * service that is being revoked
     */
    public Class getServiceClass() { return serviceClass; }

    /**
     * Checks this event to determine whether or not
     * the service being revoked is of a particular class.
     * @param service the service of interest (should be non-null)
     * @return <code>true</code> if the service being revoked is of the
     * same class as the specified service
     */
    public boolean isServiceClass(Class service) {
        return serviceClass.equals(service);
    }

    /**
     * Reports if the current service is being forcibly revoked,
     * in which case the references are now invalidated and unusable.
     * @return <code>true</code> if current service is being forcibly revoked
     */
    public boolean isCurrentServiceInvalidNow() { return invalidateRefs; }

    /**
     * fields
     */

    /**
     * A <code>Class</code> reference to the service that is being revoked.
     */
    protected Class                      serviceClass;
    private   boolean                    invalidateRefs;
}

⏎ java/beans/beancontext/BeanContextServiceRevokedEvent.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 

⇒ JRE 8 rt.jar - javax.* Package Source Code

⇐ JRE 8 plugin.jar - Java Deploy Control Panel Plugin

⇑ Download and Use JDK 8

⇑⇑ FAQ for JDK (Java Development Kit)