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/encoding/BufferQueue.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.encoding;

import java.util.LinkedList;
import java.util.NoSuchElementException;
import java.util.LinkedList;

/**
 * Simple unsynchronized queue implementation for ByteBufferWithInfos.
 */
// XREVISIT - Should be in orbutil or package private
public class BufferQueue
{
    private LinkedList list = new LinkedList();

    public void enqueue(ByteBufferWithInfo item)
    {
        list.addLast(item);
    }

    public ByteBufferWithInfo dequeue() throws NoSuchElementException
    {
        return (ByteBufferWithInfo)list.removeFirst();
    }

    public int size()
    {
        return list.size();
    }

    // Adds the given ByteBufferWithInfo to the front
    // of the queue.
    public void push(ByteBufferWithInfo item)
    {
        list.addFirst(item);
    }
}

⏎ com/sun/corba/se/impl/encoding/BufferQueue.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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