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/w3c/dom/DocumentFragment.java

/*
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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/*
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 * Copyright (c) 2004 World Wide Web Consortium,
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 * (Massachusetts Institute of Technology, European Research Consortium for
 * Informatics and Mathematics, Keio University). All Rights Reserved. This
 * work is distributed under the W3C(r) Software License [1] in the hope that
 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
 */

package org.w3c.dom;

/**
 * <code>DocumentFragment</code> is a "lightweight" or "minimal"
 * <code>Document</code> object. It is very common to want to be able to
 * extract a portion of a document's tree or to create a new fragment of a
 * document. Imagine implementing a user command like cut or rearranging a
 * document by moving fragments around. It is desirable to have an object
 * which can hold such fragments and it is quite natural to use a Node for
 * this purpose. While it is true that a <code>Document</code> object could
 * fulfill this role, a <code>Document</code> object can potentially be a
 * heavyweight object, depending on the underlying implementation. What is
 * really needed for this is a very lightweight object.
 * <code>DocumentFragment</code> is such an object.
 * <p>Furthermore, various operations -- such as inserting nodes as children
 * of another <code>Node</code> -- may take <code>DocumentFragment</code>
 * objects as arguments; this results in all the child nodes of the
 * <code>DocumentFragment</code> being moved to the child list of this node.
 * <p>The children of a <code>DocumentFragment</code> node are zero or more
 * nodes representing the tops of any sub-trees defining the structure of
 * the document. <code>DocumentFragment</code> nodes do not need to be
 * well-formed XML documents (although they do need to follow the rules
 * imposed upon well-formed XML parsed entities, which can have multiple top
 * nodes). For example, a <code>DocumentFragment</code> might have only one
 * child and that child node could be a <code>Text</code> node. Such a
 * structure model represents neither an HTML document nor a well-formed XML
 * document.
 * <p>When a <code>DocumentFragment</code> is inserted into a
 * <code>Document</code> (or indeed any other <code>Node</code> that may
 * take children) the children of the <code>DocumentFragment</code> and not
 * the <code>DocumentFragment</code> itself are inserted into the
 * <code>Node</code>. This makes the <code>DocumentFragment</code> very
 * useful when the user wishes to create nodes that are siblings; the
 * <code>DocumentFragment</code> acts as the parent of these nodes so that
 * the user can use the standard methods from the <code>Node</code>
 * interface, such as <code>Node.insertBefore</code> and
 * <code>Node.appendChild</code>.
 * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407'>Document Object Model (DOM) Level 3 Core Specification</a>.
 */
public interface DocumentFragment extends Node {
}

⏎ org/w3c/dom/DocumentFragment.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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