Java Architecture for XML Binding (JAXB) is a Java API that allows Java developers to map Java classes to XML representations.

jaxb-api-2.3.1.jar is the JAR file for the JAXB API 2.3 specification. You can download and use it directly without any building process as shown in the last tutorial.

If you want to rebuild the JAR file, you can download the source code at JAXB API Maven Website.

You can also browse the source code below:

⏎ javax/xml/bind/JAXBException.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2003-2017 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://oss.oracle.com/licenses/CDDL+GPL-1.1
 * or LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package javax.xml.bind;

import java.io.PrintWriter;

/**
 * This is the root exception class for all JAXB exceptions.
 *
 * @author <ul><li>Ryan Shoemaker, Sun Microsystems, Inc.</li></ul>
 * @see JAXBContext
 * @see Marshaller
 * @see Unmarshaller
 * @since 1.6, JAXB 1.0
 */
public class JAXBException extends Exception {
  
    /** 
     * Vendor specific error code
     *
     */
    private String errorCode;

    /** 
     * Exception reference
     *
     */
    private volatile Throwable linkedException;

    static final long serialVersionUID = -5621384651494307979L;

    /** 
     * Construct a JAXBException with the specified detail message.  The 
     * errorCode and linkedException will default to null.
     *
     * @param message a description of the exception
     */
    public JAXBException(String message) {
        this( message, null, null );
    }

    /** 
     * Construct a JAXBException with the specified detail message and vendor 
     * specific errorCode.  The linkedException will default to null.
     *
     * @param message a description of the exception
     * @param errorCode a string specifying the vendor specific error code
     */
    public JAXBException(String message, String errorCode) {
        this( message, errorCode, null );
    }

    /** 
     * Construct a JAXBException with a linkedException.  The detail message and
     * vendor specific errorCode will default to null.
     *
     * @param exception the linked exception
     */
    public JAXBException(Throwable exception) {
        this( null, null, exception );
    }
    
    /** 
     * Construct a JAXBException with the specified detail message and 
     * linkedException.  The errorCode will default to null.
     *
     * @param message a description of the exception
     * @param exception the linked exception
     */
    public JAXBException(String message, Throwable exception) {
        this( message, null, exception );
    }
    
    /** 
     * Construct a JAXBException with the specified detail message, vendor 
     * specific errorCode, and linkedException.
     *
     * @param message a description of the exception
     * @param errorCode a string specifying the vendor specific error code
     * @param exception the linked exception
     */
    public JAXBException(String message, String errorCode, Throwable exception) {
        super( message );
        this.errorCode = errorCode;
        this.linkedException = exception;
    }
    
    /** 
     * Get the vendor specific error code
     *
     * @return a string specifying the vendor specific error code
     */
    public String getErrorCode() {
        return this.errorCode;
    }

    /**
     * Get the linked exception 
     *
     * @return the linked Exception, null if none exists
     */
    public Throwable getLinkedException() {
        return linkedException;
    }

    /**
     * Add a linked Exception.
     *
     * @param exception the linked Exception (A null value is permitted and 
     *                  indicates that the linked exception does not exist or
     *                  is unknown).
     */
    public void setLinkedException( Throwable exception ) {
        this.linkedException = exception;
    }
    
    /**
     * Returns a short description of this JAXBException.
     *
     */
    public String toString() {
        return linkedException == null ? 
            super.toString() :
            super.toString() + "\n - with linked exception:\n[" +
                                linkedException.toString()+ "]";
    }

    /**
     * Prints this JAXBException and its stack trace (including the stack trace
     * of the linkedException if it is non-null) to the PrintStream.
     *
     * @param s PrintStream to use for output
     */
    public void printStackTrace( java.io.PrintStream s ) {
        super.printStackTrace(s);
    }

    /**
     * Prints this JAXBException and its stack trace (including the stack trace
     * of the linkedException if it is non-null) to {@code System.err}.
     *
     */
    public void printStackTrace() {
        super.printStackTrace();
    }

    /**
     * Prints this JAXBException and its stack trace (including the stack trace
     * of the linkedException if it is non-null) to the PrintWriter.
     *
     * @param s PrintWriter to use for output
     */
    public void printStackTrace(PrintWriter s) {
        super.printStackTrace(s);
    }

    @Override
    public Throwable getCause() {
        return linkedException;
    }
}

⏎ javax/xml/bind/JAXBException.java

Or download all of them as a single archive file:

File name: jaxb-api-2.3.1-sources.jar
File size: 271123 bytes
Release date: 2018-10-10
Download 

⇒ Download JAXB 2.2 Specification and API JAR

⇐ Download JAXB 2.3 Specification and API JAR

⇑ JAXB (Java Architecture for XML Binding) API Specification

⇑⇑ FAQ for jaxb-*.jar - Java Architecture for XML Binding