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/protocol/giopmsgheaders/AddressingDispositionHelper.java

/*
 * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

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


/**
* com/sun/corba/se/impl/protocol/giopmsgheaders/AddressingDispositionHelper.java
* Generated by the IDL-to-Java compiler (portable), version "3.0"
* from ../../../../../../../src/share/classes/com/sun/corba/se/GiopIDL/g.idl
* Sunday, June 4, 2000 5:18:54 PM PDT
*/

abstract public class AddressingDispositionHelper
{
  private static String  _id = "IDL:messages/AddressingDisposition:1.0";

  public static void insert (org.omg.CORBA.Any a, short that)
  {
    org.omg.CORBA.portable.OutputStream out = a.create_output_stream ();
    a.type (type ());
    write (out, that);
    a.read_value (out.create_input_stream (), type ());
  }

  public static short extract (org.omg.CORBA.Any a)
  {
    return read (a.create_input_stream ());
  }

  private static org.omg.CORBA.TypeCode __typeCode = null;
  synchronized public static org.omg.CORBA.TypeCode type ()
  {
    if (__typeCode == null)
    {
      __typeCode = org.omg.CORBA.ORB.init ().get_primitive_tc (org.omg.CORBA.TCKind.tk_short);
      __typeCode = org.omg.CORBA.ORB.init ().create_alias_tc (com.sun.corba.se.impl.protocol.giopmsgheaders.AddressingDispositionHelper.id (), "AddressingDisposition", __typeCode);
    }
    return __typeCode;
  }

  public static String id ()
  {
    return _id;
  }

  public static short read (org.omg.CORBA.portable.InputStream istream)
  {
    short value = (short)0;
    value = istream.read_short ();
    return value;
  }

  public static void write (org.omg.CORBA.portable.OutputStream ostream, short value)
  {
    ostream.write_short (value);
  }

}

⏎ com/sun/corba/se/impl/protocol/giopmsgheaders/AddressingDispositionHelper.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 

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