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 javax.* package in JRE 1.8.0_191 rt.jar. Java source codes are also provided.

⏎ javax/sql/RowSetEvent.java

/*
 * Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package javax.sql;

/**
 * An <code>Event</code> object generated when an event occurs to a
 * <code>RowSet</code> object.  A <code>RowSetEvent</code> object is
 * generated when a single row in a rowset is changed, the whole rowset
 * is changed, or the rowset cursor moves.
 * <P>
 * When an event occurs on a <code>RowSet</code> object, one of the
 * <code>RowSetListener</code> methods will be sent to all registered
 * listeners to notify them of the event.  An <code>Event</code> object
 * is supplied to the <code>RowSetListener</code> method so that the
 * listener can use it to find out which <code>RowSet</code> object is
 * the source of the event.
 *
 * @since 1.4
 */

public class RowSetEvent extends java.util.EventObject {

  /**
   * Constructs a <code>RowSetEvent</code> object initialized with the
   * given <code>RowSet</code> object.
   *
   * @param source the <code>RowSet</code> object whose data has changed or
   *        whose cursor has moved
   * @throws IllegalArgumentException if <code>source</code> is null.
   */
  public RowSetEvent(RowSet source)
    { super(source); }

  /**
   * Private serial version unique ID to ensure serialization
   * compatibility.
   */
  static final long serialVersionUID = -1875450876546332005L;
}

⏎ javax/sql/RowSetEvent.java

Or download all of them as a single archive file:

File name: jre-rt-javax-1.8.0_191-src.zip
File size: 5381005 bytes
Release date: 2018-10-28
Download 

⇒ JRE 8 rt.jar - org.* Package Source Code

⇐ JRE 8 rt.jar - java.* Package Source Code

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