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/Chromaticity.java

/*
 * Copyright (c) 2000, 2013, 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.EnumSyntax;
import javax.print.attribute.DocAttribute;
import javax.print.attribute.PrintRequestAttribute;
import javax.print.attribute.PrintJobAttribute;

/**
 * Class Chromaticity is a printing attribute class, an enumeration, that
 * specifies monochrome or color printing. This is used by a print client
 * to specify how the print data should be generated or processed. It is not
 * descriptive of the color capabilities of the device. Query the service's
 * {@link ColorSupported ColorSupported} attribute to determine if the device
 * can be verified to support color printing.
 * <P>
 * The table below shows the effects of specifying a Chromaticity attribute of
 * {@link #MONOCHROME MONOCHROME} or {@link #COLOR COLOR}
 * for a monochrome or color document.
 * <P>
 * <TABLE BORDER=1 CELLPADDING=2 CELLSPACING=1 SUMMARY="Shows effects of specifying MONOCHROME or COLOR Chromaticity attributes">
 * <TR>
 * <TH>
 * Chromaticity<BR>Attribute
 * </TH>
 * <TH>
 * Effect on<BR>Monochrome Document
 * </TH>
 * <TH>
 * Effect on<BR>Color Document
 * </TH>
 * </TR>
 * <TR>
 * <TD>
 * {@link #MONOCHROME MONOCHROME}
 * </TD>
 * <TD>
 * Printed as is, in monochrome
 * </TD>
 * <TD>
 * Printed in monochrome, with colors converted to shades of gray
 * </TD>
 * </TR>
 * <TR>
 * <TD>
 * {@link #COLOR COLOR}
 * </TD>
 * <TD>
 * Printed as is, in monochrome
 * </TD>
 * <TD>
 * Printed as is, in color
 * </TD>
 * </TR>
 * </TABLE>
 * <P>
 * <P>
 * <B>IPP Compatibility:</B> Chromaticity is not an IPP attribute at present.
 * <P>
 *
 * @author  Alan Kaminsky
 */
public final class Chromaticity extends EnumSyntax
    implements DocAttribute, PrintRequestAttribute, PrintJobAttribute {

    private static final long serialVersionUID = 4660543931355214012L;

    /**
     * Monochrome printing.
     */
    public static final Chromaticity MONOCHROME = new Chromaticity(0);

    /**
     * Color printing.
     */
    public static final Chromaticity COLOR = new Chromaticity(1);


    /**
     * Construct a new chromaticity enumeration value with the given integer
     * value.
     *
     * @param  value  Integer value.
     */
    protected Chromaticity(int value) {
        super(value);
    }

    private static final String[] myStringTable = {"monochrome",
                                                   "color"};

    private static final Chromaticity[] myEnumValueTable = {MONOCHROME,
                                                            COLOR};

    /**
     * Returns the string table for class Chromaticity.
     */
    protected String[] getStringTable() {
        return myStringTable;
    }

    /**
     * Returns the enumeration value table for class Chromaticity.
     */
    protected EnumSyntax[] getEnumValueTable() {
        return myEnumValueTable;
    }

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

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

        }

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