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/javadoc/AnnotationValue.java

/*
 * Copyright (c) 2003, 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.javadoc;


/**
 * Represents a value of an annotation type element.
 *
 * @author Scott Seligman
 * @since 1.5
 */
public interface AnnotationValue {

    /**
     * Returns the value.
     * The type of the returned object is one of the following:
     * <ul><li> a wrapper class for a primitive type
     *     <li> <code>String</code>
     *     <li> <code>Type</code> (representing a class literal)
     *     <li> <code>FieldDoc</code> (representing an enum constant)
     *     <li> <code>AnnotationDesc</code>
     *     <li> <code>AnnotationValue[]</code>
     * </ul>
     *
     * @return the value.
     */
    Object value();

    /**
     * Returns a string representation of the value.
     *
     * @return the text of a Java language annotation value expression
     *          whose value is the value of this element.
     */
    String toString();
}

⏎ com/sun/javadoc/AnnotationValue.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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