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

⏎ org/omg/CORBA/PolicyOperations.java

/*
 * Copyright (c) 1999, 2001, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package org.omg.CORBA;


/**
* The interface for <tt>Policy</tt>.  For more information on
* Operations interfaces, see <a href="doc-files/generatedfiles.html#operations">
* "Generated Files: Operations files"</a>.
*<P>
* org/omg/CORBA/PolicyOperations.java
* Generated by the IDL-to-Java compiler (portable), version "3.0"
* from ../../../../../src/share/classes/org/omg/PortableServer/corba.idl
* Saturday, July 17, 1999 12:26:20 AM PDT
*/

/**
 * Provides the operations for a <code>Policy</code> object.
 */
public interface PolicyOperations
{

  /**
   * Returns the constant value that corresponds to the
   * type of the policy object.  The values of
   * the policy objects are allocated by the OMG.
   * New values for PolicyType should be obtained from the OMG by
   * sending mail to request@omg.org.  In general the constant
   * values that are allocated are defined in conjunction with
   * the definition of the corresponding policy object.
   *
   * @return the constant value that corresponds to the type of
   * the policy object
   */
  int policy_type ();

  /**
   * Returns a copy of the <code>Policy</code> object. The copy does not retain
   * any relationships that the policy had with any domain or object.
   *
   * @return a copy of the <code>Policy</code> object
   */
  org.omg.CORBA.Policy copy ();

  /**
   * Destroys the <code>Policy</code> object.  It is the responsibility of
   * the <code>Policy</code> object to determine whether it can be destroyed.
   */
  void destroy ();
} // interface PolicyOperations

⏎ org/omg/CORBA/PolicyOperations.java

Or download all of them as a single archive file:

File name: jre-rt-org-1.8.0_191-src.zip
File size: 951125 bytes
Release date: 2018-10-28
Download 

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

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

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