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/ior/iiop/AlternateIIOPAddressComponentImpl.java

/*
 * Copyright (c) 2000, 2004, 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.ior.iiop;

import org.omg.CORBA_2_3.portable.OutputStream ;

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

import com.sun.corba.se.spi.ior.iiop.IIOPAddress ;
import com.sun.corba.se.spi.ior.iiop.AlternateIIOPAddressComponent ;

import org.omg.IOP.TAG_ALTERNATE_IIOP_ADDRESS ;

/**
 * @author Ken Cavanaugh
 */
public class AlternateIIOPAddressComponentImpl extends TaggedComponentBase
    implements AlternateIIOPAddressComponent
{
    private IIOPAddress addr ;

    public boolean equals( Object obj )
    {
        if (!(obj instanceof AlternateIIOPAddressComponentImpl))
            return false ;

        AlternateIIOPAddressComponentImpl other =
            (AlternateIIOPAddressComponentImpl)obj ;

        return addr.equals( other.addr ) ;
    }

    public int hashCode()
    {
        return addr.hashCode() ;
    }

    public String toString()
    {
        return "AlternateIIOPAddressComponentImpl[addr=" + addr + "]" ;
    }

    public AlternateIIOPAddressComponentImpl( IIOPAddress addr )
    {
        this.addr = addr ;
    }

    public IIOPAddress getAddress()
    {
        return addr ;
    }

    public void writeContents(OutputStream os)
    {
        addr.write( os ) ;
    }

    public int getId()
    {
        return TAG_ALTERNATE_IIOP_ADDRESS.value ; // 3 in CORBA 2.3.1 13.6.3
    }
}

⏎ com/sun/corba/se/impl/ior/iiop/AlternateIIOPAddressComponentImpl.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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