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

⏎ javax/rmi/CORBA/Tie.java

/*
 * Copyright (c) 1998, 2001, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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/*
 * Licensed Materials - Property of IBM
 * RMI-IIOP v1.0
 * Copyright IBM Corp. 1998 1999  All Rights Reserved
 *
 */

package javax.rmi.CORBA;

import java.rmi.Remote;
import java.util.Hashtable;

import org.omg.CORBA.portable.ApplicationException;
import org.omg.CORBA.portable.InputStream;
import org.omg.CORBA.portable.OutputStream;
import org.omg.CORBA.portable.ObjectImpl;
import org.omg.CORBA.portable.ResponseHandler;
import org.omg.CORBA.portable.Delegate;
import org.omg.CORBA.ORB;

/**
 * Defines methods which all RMI-IIOP server side ties must implement.
 */
public interface Tie extends org.omg.CORBA.portable.InvokeHandler {
    /**
     * Returns an object reference for the target object represented by
     * this tie.
     * @return an object reference for the target object.
     */
    org.omg.CORBA.Object thisObject();

    /**
     * Deactivates the target object represented by this tie.
     */
    void deactivate() throws java.rmi.NoSuchObjectException;

    /**
     * Returns the ORB for this tie.
     * @return the ORB.
     */
    ORB orb();

    /**
     * Sets the ORB for this tie.
     * @param orb the ORB.
     */
    void orb(ORB orb);

    /**
     * Called by {@link Util#registerTarget} to set the target
     * for this tie.
     * @param target the object to use as the target for this tie.
     */
    void setTarget(java.rmi.Remote target);

    /**
     * Returns the target for this tie.
     * @return the target.
     */
    java.rmi.Remote getTarget();
}

⏎ javax/rmi/CORBA/Tie.java

Or download all of them as a single archive file:

File name: jre-rt-javax-1.8.0_191-src.zip
File size: 5381005 bytes
Release date: 2018-10-28
Download 

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

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

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