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/PagesPerMinuteColor.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 javax.print.attribute.Attribute;
import javax.print.attribute.IntegerSyntax;
import javax.print.attribute.PrintServiceAttribute;

/**
 * Class PagesPerMinuteColor is an integer valued printing attribute that
 * indicates the nominal number of pages per minute to the nearest whole number
 * which may be generated by this printer when printing color (e.g., simplex,
 * color). For purposes of this attribute, "color" means the same as for the
 * {@link ColorSupported ColorSupported} attribute, namely, the device is
 * capable of any type of color printing at all, including highlight color as
 * well as full process color. This attribute is informative, not a service
 * guarantee. Generally, it is the value used in the marketing literature to
 * describe the color capabilities of this device. A value of 0 indicates a
 * device that takes more than two minutes to process a page. If a color device
 * has several color modes, it may use the pages-per- minute value for this
 * attribute that corresponds to the mode that produces the highest number.
 * <P>
 * A black and white only printer must not include the PagesPerMinuteColor
 * attribute in its attribute set or service registration. If this attribute is
 * present, then the {@link ColorSupported ColorSupported} printer description
 * attribute must also be present and have a value of SUPPORTED.
 * <P>
 * <B>IPP Compatibility:</B> The integer value gives the IPP integer value. The
 * category name returned by <CODE>getName()</CODE> gives the IPP attribute
 * name.
 * <P>
 *
 * @author  Alan Kaminsky
 */
public final class PagesPerMinuteColor extends IntegerSyntax
        implements PrintServiceAttribute {

    static final long serialVersionUID = 1684993151687470944L;

    /**
     * Construct a new pages per minute color attribute with the given integer
     * value.
     *
     * @param  value  Integer value.
     *
     * @exception  IllegalArgumentException
     *    (Unchecked exception) Thrown if <CODE>value</CODE> is less than 0.
     */
    public PagesPerMinuteColor(int value) {
        super(value, 0, Integer.MAX_VALUE);
    }

    /**
     * Returns whether this pages per minute color 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 PagesPerMinuteColor.
     * <LI>
     * This pages per minute attribute's value and <CODE>object</CODE>'s
     * value are equal.
     * </OL>
     *
     * @param  object  Object to compare to.
     *
     * @return  True if <CODE>object</CODE> is equivalent to this pages per
     *          minute color attribute, false otherwise.
     */
    public boolean equals(Object object) {
        return (super.equals(object) &&
                object instanceof PagesPerMinuteColor);
    }

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

    /**
     * Get the name of the category of which this attribute value is an
     * instance.
     * <P>
     * For class PagesPerMinuteColor, the
     * category name is <CODE>"pages-per-minute-color"</CODE>.
     *
     * @return  Attribute category name.
     */
    public final String getName() {
        return "pages-per-minute-color";
    }

}

⏎ javax/print/attribute/standard/PagesPerMinuteColor.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)