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/spi/ior/iiop/IIOPProfileTemplate.java

/*
 * Copyright (c) 2002, 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.spi.ior.iiop;

import java.util.List ;
import java.util.Iterator ;

import org.omg.CORBA_2_3.portable.OutputStream ;

import com.sun.corba.se.spi.ior.TaggedProfileTemplate ;

import com.sun.corba.se.spi.ior.iiop.GIOPVersion ;
import com.sun.corba.se.spi.orb.ORB ;

/**
 * IIOPProfileTemplate represents the parts of an IIOPProfile that are independent
 * of the object identifier.  It is a container of tagged components.
 */
public interface IIOPProfileTemplate extends TaggedProfileTemplate
{
    /** Return the GIOP version of this profile.
    */
    public GIOPVersion getGIOPVersion() ;

    /** Return the IIOP address from the IIOP profile.  This is called the
    * primary address here since other addresses may be contained in
    * components.
    */
    public IIOPAddress getPrimaryAddress()  ;
}

⏎ com/sun/corba/se/spi/ior/iiop/IIOPProfileTemplate.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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