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/print/attribute/standard/DateTimeAtProcessing.java

/*
 * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */
package javax.print.attribute.standard;

import java.util.Date;
import javax.print.attribute.Attribute;
import javax.print.attribute.DateTimeSyntax;
import javax.print.attribute.PrintJobAttribute;

/**
 * Class DateTimeAtProcessing is a printing attribute class, a date-time
 * attribute, that indicates the date and time at which the Print Job first
 * began processing.
 * <P>
 * To construct a DateTimeAtProcessing attribute from separate values of the
 * year, month, day, hour, minute, and so on, use a {@link java.util.Calendar
 * Calendar} object to construct a {@link java.util.Date Date} object, then use
 * the {@link java.util.Date Date} object to construct the DateTimeAtProcessing
 * attribute. To convert a DateTimeAtProcessing attribute to separate values of
 * the year, month, day, hour, minute, and so on, create a {@link
 * java.util.Calendar Calendar} object and set it to the {@link java.util.Date
 * Date} from the DateTimeAtProcessing attribute.
 * <P>
 * <B>IPP Compatibility:</B> The information needed to construct an IPP
 * "date-time-at-processing" attribute can be obtained as described above. The
 * category name returned by <CODE>getName()</CODE> gives the IPP attribute
 * name.
 * <P>
 *
 * @author  Alan Kaminsky
 */
public final class DateTimeAtProcessing extends DateTimeSyntax
        implements PrintJobAttribute {

    private static final long serialVersionUID = -3710068197278263244L;

    /**
     * Construct a new date-time at processing attribute with the given {@link
     * java.util.Date Date} value.
     *
     * @param  dateTime  {@link java.util.Date Date} value.
     *
     * @exception  NullPointerException
     *     (unchecked exception) Thrown if <CODE>dateTime</CODE> is null.
     */
    public DateTimeAtProcessing(Date dateTime) {
        super (dateTime);
    }

    /**
     * Returns whether this date-time at processing attribute is equivalent to
     * the passed in object. To be equivalent, all of the following conditions
     * must be true:
     * <OL TYPE=1>
     * <LI>
     * <CODE>object</CODE> is not null.
     * <LI>
     * <CODE>object</CODE> is an instance of class DateTimeAtProcessing.
     * <LI>
     * This date-time at processing attribute's {@link java.util.Date Date}
     * value and <CODE>object</CODE>'s {@link java.util.Date Date} value
     * are equal.
     * </OL>
     *
     * @param  object  Object to compare to.
     *
     * @return  True if <CODE>object</CODE> is equivalent to this date-time
     *          at processing attribute, false otherwise.
     */
    public boolean equals(Object object) {
        return(super.equals (object) &&
               object instanceof DateTimeAtProcessing);
    }

    /**
     * Get the printing attribute class which is to be used as the "category"
     * for this printing attribute value.
     * <P>
     * For class DateTimeAtProcessing, the category is class
     * DateTimeAtProcessing itself.
     *
     * @return  Printing attribute class (category), an instance of class
     *          {@link java.lang.Class java.lang.Class}.
     */
    public final Class<? extends Attribute> getCategory() {
        return DateTimeAtProcessing.class;
    }

    /**
     * Get the name of the category of which this attribute value is an
     * instance.
     * <P>
     * For class DateTimeAtProcessing, the category name is
     * <CODE>"date-time-at-processing"</CODE>.
     *
     * @return  Attribute category name.
     */
    public final String getName() {
        return "date-time-at-processing";
    }

}

⏎ javax/print/attribute/standard/DateTimeAtProcessing.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

⇑ Download and Use JDK 8

⇑⇑ FAQ for JDK (Java Development Kit)