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/imageio/metadata/IIOInvalidTreeException.java

/*
 * Copyright (c) 2000, 2001, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package javax.imageio.metadata;

import javax.imageio.IIOException;
import org.w3c.dom.Node;

/**
 * An <code>IIOInvalidTreeException</code> is thrown when an attempt
 * by an <code>IIOMetadata</code> object to parse a tree of
 * <code>IIOMetadataNode</code>s fails.  The node that led to the
 * parsing error may be stored.  As with any parsing error, the actual
 * error may occur at a different point that that where it is
 * detected.  The node returned by <code>getOffendingNode</code>
 * should merely be considered as a clue to the actual nature of the
 * problem.
 *
 * @see IIOMetadata#setFromTree
 * @see IIOMetadata#mergeTree
 * @see IIOMetadataNode
 *
 */
public class IIOInvalidTreeException extends IIOException {

    /**
     * The <code>Node</code> that led to the parsing error, or
     * <code>null</code>.
     */
    protected Node offendingNode = null;

    /**
     * Constructs an <code>IIOInvalidTreeException</code> with a
     * message string and a reference to the <code>Node</code> that
     * caused the parsing error.
     *
     * @param message a <code>String</code> containing the reason for
     * the parsing failure.
     * @param offendingNode the DOM <code>Node</code> that caused the
     * exception, or <code>null</code>.
     */
    public IIOInvalidTreeException(String message, Node offendingNode) {
        super(message);
        this.offendingNode = offendingNode;
    }

    /**
     * Constructs an <code>IIOInvalidTreeException</code> with a
     * message string, a reference to an exception that caused this
     * exception, and a reference to the <code>Node</code> that caused
     * the parsing error.
     *
     * @param message a <code>String</code> containing the reason for
     * the parsing failure.
     * @param cause the <code>Throwable</code> (<code>Error</code> or
     * <code>Exception</code>) that caused this exception to occur,
     * or <code>null</code>.
     * @param offendingNode the DOM <code>Node</code> that caused the
     * exception, or <code>null</code>.
     */
    public IIOInvalidTreeException(String message, Throwable cause,
                                   Node offendingNode) {
        super(message, cause);
        this.offendingNode = offendingNode;
    }

    /**
     * Returns the <code>Node</code> that caused the error in parsing.
     *
     * @return the offending <code>Node</code>.
     */
    public Node getOffendingNode() {
        return offendingNode;
    }
}

⏎ javax/imageio/metadata/IIOInvalidTreeException.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

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