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 java.* package in JRE 1.8.0_191 rt.jar. Java source codes are also provided.

⏎ java/sql/SQLTransientConnectionException.java

/*
 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package java.sql;

/**
 * The subclass of {@link SQLException} for the SQLState class
 * value '<i>08</i>', or under vendor-specified conditions.  This indicates
 * that the connection operation that failed might be able to succeed if
 * the operation is retried without any application-level changes.
 * <p>
 * Please consult your driver vendor documentation for the vendor-specified
 * conditions for which this <code>Exception</code> may be thrown.
 * @since 1.6
 */
public class SQLTransientConnectionException extends java.sql.SQLTransientException {

        /**
         * Constructs a <code>SQLTransientConnectionException</code> object.
         * The <code>reason</code>, <code>SQLState</code> are initialized
         * to <code>null</code> and the vendor code is initialized to 0.
         *
         * The <code>cause</code> is not initialized, and may subsequently be
         * initialized by a call to the
         * {@link Throwable#initCause(java.lang.Throwable)} method.
         * <p>
         * @since 1.6
         */
        public SQLTransientConnectionException() {
                super();
        }

        /**
         * Constructs a <code>SQLTransientConnectionException</code> object
         * with a given <code>reason</code>. The <code>SQLState</code>
         * is initialized to <code>null</code> and the vendor code is initialized
         * to 0.
         *
         * The <code>cause</code> is not initialized, and may subsequently be
         * initialized by a call to the
         * {@link Throwable#initCause(java.lang.Throwable)} method.
         * <p>
         * @param reason a description of the exception
         * @since 1.6
         */
        public SQLTransientConnectionException(String reason) {
                super(reason);
        }

        /**
         * Constructs a <code>SQLTransientConnectionException</code> object
         * with a given <code>reason</code> and <code>SQLState</code>.
         *
         * The <code>cause</code> is not initialized, and may subsequently be
         * initialized by a call to the
         * {@link Throwable#initCause(java.lang.Throwable)} method. The vendor code
         * is initialized to 0.
         * <p>
         * @param reason a description of the exception
         * @param SQLState an XOPEN or SQL:2003 code identifying the exception
         * @since 1.6
         */
        public SQLTransientConnectionException(String reason, String SQLState) {
                super(reason,SQLState);
        }

        /**
         * Constructs a <code>SQLTransientConnectionException</code> object
         * with a given <code>reason</code>, <code>SQLState</code>  and
         * <code>vendorCode</code>.
         *
         * The <code>cause</code> is not initialized, and may subsequently be
         * initialized by a call to the
         * {@link Throwable#initCause(java.lang.Throwable)} method.
         * <p>
         * @param reason a description of the exception
         * @param SQLState an XOPEN or SQL:2003 code identifying the exception
         * @param vendorCode a database vendor specific exception code
         * @since 1.6
         */
        public SQLTransientConnectionException(String reason, String SQLState, int vendorCode) {
                super(reason,SQLState,vendorCode);
        }

   /**
     * Constructs a <code>SQLTransientConnectionException</code> object
     * with a given  <code>cause</code>.
     * The <code>SQLState</code> is initialized
     * to <code>null</code> and the vendor code is initialized to 0.
     * The <code>reason</code>  is initialized to <code>null</code> if
     * <code>cause==null</code> or to <code>cause.toString()</code> if
     * <code>cause!=null</code>.
     * <p>
     * @param cause the underlying reason for this <code>SQLException</code> (which is saved for later retrieval by the <code>getCause()</code> method); may be null indicating
     *     the cause is non-existent or unknown.
     * @since 1.6
    */
    public SQLTransientConnectionException(Throwable cause) {
        super(cause);
    }

    /**
     * Constructs a <code>SQLTransientConnectionException</code> object
     * with a given
     * <code>reason</code> and  <code>cause</code>.
     * The <code>SQLState</code> is  initialized to <code>null</code>
     * and the vendor code is initialized to 0.
     * <p>
     * @param reason a description of the exception.
     * @param cause the underlying reason for this <code>SQLException</code>(which is saved for later retrieval by the <code>getCause()</code> method); may be null indicating
     *     the cause is non-existent or unknown.
    * @since 1.6
     */
    public SQLTransientConnectionException(String reason, Throwable cause) {
        super(reason,cause);
    }

    /**
     * Constructs a <code>SQLTransientConnectionException</code> object
     * with a given
     * <code>reason</code>, <code>SQLState</code> and  <code>cause</code>.
     * The vendor code is initialized to 0.
     * <p>
     * @param reason a description of the exception.
     * @param SQLState an XOPEN or SQL:2003 code identifying the exception
     * @param cause the underlying reason for this <code>SQLException</code> (which is saved for later retrieval by the <code>getCause()</code> method); may be null indicating
     *     the cause is non-existent or unknown.
     * @since 1.6
     */
    public SQLTransientConnectionException(String reason, String SQLState, Throwable cause) {
        super(reason,SQLState,cause);
    }

    /**
     *  Constructs a <code>SQLTransientConnectionException</code> object
     * with a given
     * <code>reason</code>, <code>SQLState</code>, <code>vendorCode</code>
     * and  <code>cause</code>.
     * <p>
     * @param reason a description of the exception
     * @param SQLState an XOPEN or SQL:2003 code identifying the exception
     * @param vendorCode a database vendor-specific exception code
     * @param cause the underlying reason for this <code>SQLException</code> (which is saved for later retrieval by the <code>getCause()</code> method); may be null indicating
     *     the cause is non-existent or unknown.
     * @since 1.6
     */
    public SQLTransientConnectionException(String reason, String SQLState, int vendorCode, Throwable cause) {
        super(reason,SQLState,vendorCode,cause);
    }

    private static final long serialVersionUID = -2520155553543391200L;
}

⏎ java/sql/SQLTransientConnectionException.java

Or download all of them as a single archive file:

File name: jre-rt-java-1.8.0_191-src.zip
File size: 6664831 bytes
Release date: 2018-10-28
Download 

⇒ JRE 8 rt.jar - javax.* Package Source Code

⇐ JRE 8 plugin.jar - Java Deploy Control Panel Plugin

⇑ Download and Use JDK 8

⇑⇑ FAQ for JDK (Java Development Kit)