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/accessibility/AccessibleTable.java

/*
 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package javax.accessibility;

/**
 * Class AccessibleTable describes a user-interface component that
 * presents data in a two-dimensional table format.
 *
 * @author      Lynn Monsanto
 * @since 1.3
 */
public interface AccessibleTable {

    /**
     * Returns the caption for the table.
     *
     * @return the caption for the table
     */
    public Accessible getAccessibleCaption();

    /**
     * Sets the caption for the table.
     *
     * @param a the caption for the table
     */
    public void setAccessibleCaption(Accessible a);

    /**
     * Returns the summary description of the table.
     *
     * @return the summary description of the table
     */
    public Accessible getAccessibleSummary();

    /**
     * Sets the summary description of the table
     *
     * @param a the summary description of the table
     */
    public void setAccessibleSummary(Accessible a);

    /**
     * Returns the number of rows in the table.
     *
     * @return the number of rows in the table
     */
    public int getAccessibleRowCount();

    /**
     * Returns the number of columns in the table.
     *
     * @return the number of columns in the table
     */
    public int getAccessibleColumnCount();

    /**
     * Returns the Accessible at a specified row and column
     * in the table.
     *
     * @param r zero-based row of the table
     * @param c zero-based column of the table
     * @return the Accessible at the specified row and column
     */
    public Accessible getAccessibleAt(int r, int c);

    /**
     * Returns the number of rows occupied by the Accessible at
     * a specified row and column in the table.
     *
     * @param r zero-based row of the table
     * @param c zero-based column of the table
     * @return the number of rows occupied by the Accessible at a
     * given specified (row, column)
     */
    public int getAccessibleRowExtentAt(int r, int c);

    /**
     * Returns the number of columns occupied by the Accessible at
     * a specified row and column in the table.
     *
     * @param r zero-based row of the table
     * @param c zero-based column of the table
     * @return the number of columns occupied by the Accessible at a
     * given specified row and column
     */
    public int getAccessibleColumnExtentAt(int r, int c);

    /**
     * Returns the row headers as an AccessibleTable.
     *
     * @return an AccessibleTable representing the row
     * headers
     */
    public AccessibleTable getAccessibleRowHeader();

    /**
     * Sets the row headers.
     *
     * @param table an AccessibleTable representing the
     * row headers
     */
    public void setAccessibleRowHeader(AccessibleTable table);

    /**
     * Returns the column headers as an AccessibleTable.
     *
     * @return an AccessibleTable representing the column
     * headers
     */
    public AccessibleTable getAccessibleColumnHeader();

    /**
     * Sets the column headers.
     *
     * @param table an AccessibleTable representing the
     * column headers
     */
    public void setAccessibleColumnHeader(AccessibleTable table);

    /**
     * Returns the description of the specified row in the table.
     *
     * @param r zero-based row of the table
     * @return the description of the row
     */
    public Accessible getAccessibleRowDescription(int r);

    /**
     * Sets the description text of the specified row of the table.
     *
     * @param r zero-based row of the table
     * @param a the description of the row
     */
    public void setAccessibleRowDescription(int r, Accessible a);

    /**
     * Returns the description text of the specified column in the table.
     *
     * @param c zero-based column of the table
     * @return the text description of the column
     */
    public Accessible getAccessibleColumnDescription(int c);

    /**
     * Sets the description text of the specified column in the table.
     *
     * @param c zero-based column of the table
     * @param a the text description of the column
     */
    public void setAccessibleColumnDescription(int c, Accessible a);

    /**
     * Returns a boolean value indicating whether the accessible at
     * a specified row and column is selected.
     *
     * @param r zero-based row of the table
     * @param c zero-based column of the table
     * @return the boolean value true if the accessible at the
     * row and column is selected. Otherwise, the boolean value
     * false
     */
    public boolean isAccessibleSelected(int r, int c);

    /**
     * Returns a boolean value indicating whether the specified row
     * is selected.
     *
     * @param r zero-based row of the table
     * @return the boolean value true if the specified row is selected.
     * Otherwise, false.
     */
    public boolean isAccessibleRowSelected(int r);

    /**
     * Returns a boolean value indicating whether the specified column
     * is selected.
     *
     * @param c zero-based column of the table
     * @return the boolean value true if the specified column is selected.
     * Otherwise, false.
     */
    public boolean isAccessibleColumnSelected(int c);

    /**
     * Returns the selected rows in a table.
     *
     * @return an array of selected rows where each element is a
     * zero-based row of the table
     */
    public int [] getSelectedAccessibleRows();

    /**
     * Returns the selected columns in a table.
     *
     * @return an array of selected columns where each element is a
     * zero-based column of the table
     */
    public int [] getSelectedAccessibleColumns();
}

⏎ javax/accessibility/AccessibleTable.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)