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/management/DynamicMBean.java

/*
 * Copyright (c) 1999, 2003, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package javax.management;


/**
 * Defines the methods that should be implemented by
 * a Dynamic MBean (MBean that exposes a dynamic management interface).
 *
 * @since 1.5
 */
public interface DynamicMBean {


    /**
     * Obtain the value of a specific attribute of the Dynamic MBean.
     *
     * @param attribute The name of the attribute to be retrieved
     *
     * @return  The value of the attribute retrieved.
     *
     * @exception AttributeNotFoundException
     * @exception MBeanException  Wraps a <CODE>java.lang.Exception</CODE> thrown by the MBean's getter.
     * @exception ReflectionException  Wraps a <CODE>java.lang.Exception</CODE> thrown while trying to invoke the getter.
     *
     * @see #setAttribute
     */
    public Object getAttribute(String attribute) throws AttributeNotFoundException,
        MBeanException, ReflectionException;

    /**
     * Set the value of a specific attribute of the Dynamic MBean.
     *
     * @param attribute The identification of the attribute to
     * be set and  the value it is to be set to.
     *
     * @exception AttributeNotFoundException
     * @exception InvalidAttributeValueException
     * @exception MBeanException Wraps a <CODE>java.lang.Exception</CODE> thrown by the MBean's setter.
     * @exception ReflectionException Wraps a <CODE>java.lang.Exception</CODE> thrown while trying to invoke the MBean's setter.
     *
     * @see #getAttribute
     */
    public void setAttribute(Attribute attribute) throws AttributeNotFoundException,
        InvalidAttributeValueException, MBeanException, ReflectionException ;

    /**
     * Get the values of several attributes of the Dynamic MBean.
     *
     * @param attributes A list of the attributes to be retrieved.
     *
     * @return  The list of attributes retrieved.
     *
     * @see #setAttributes
     */
    public AttributeList getAttributes(String[] attributes);

    /**
     * Sets the values of several attributes of the Dynamic MBean.
     *
     * @param attributes A list of attributes: The identification of the
     * attributes to be set and  the values they are to be set to.
     *
     * @return  The list of attributes that were set, with their new values.
     *
     * @see #getAttributes
     */
    public AttributeList setAttributes(AttributeList attributes);

    /**
     * Allows an action to be invoked on the Dynamic MBean.
     *
     * @param actionName The name of the action to be invoked.
     * @param params An array containing the parameters to be set when the action is
     * invoked.
     * @param signature An array containing the signature of the action. The class objects will
     * be loaded through the same class loader as the one used for loading the
     * MBean on which the action is invoked.
     *
     * @return  The object returned by the action, which represents the result of
     * invoking the action on the MBean specified.
     *
     * @exception MBeanException  Wraps a <CODE>java.lang.Exception</CODE> thrown by the MBean's invoked method.
     * @exception ReflectionException  Wraps a <CODE>java.lang.Exception</CODE> thrown while trying to invoke the method
     */
    public Object invoke(String actionName, Object params[], String signature[])
        throws MBeanException, ReflectionException ;

    /**
     * Provides the exposed attributes and actions of the Dynamic MBean using an MBeanInfo object.
     *
     * @return  An instance of <CODE>MBeanInfo</CODE> allowing all attributes and actions
     * exposed by this Dynamic MBean to be retrieved.
     *
     */
    public MBeanInfo getMBeanInfo();

 }

⏎ javax/management/DynamicMBean.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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