Java tutorial
/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 1997-2017 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.mail; import java.io.Serializable; /** * This abstract class models the addresses in a message. * Subclasses provide specific implementations. Subclasses * will typically be serializable so that (for example) the * use of Address objects in search terms can be serialized * along with the search terms. * * @author John Mani * @author Bill Shannon */ public abstract class Address implements Serializable { private static final long serialVersionUID = -5822459626751992278L; /** * Return a type string that identifies this address type. * * @return address type * @see javax.mail.internet.InternetAddress */ public abstract String getType(); /** * Return a String representation of this address object. * * @return string representation of this address */ @Override public abstract String toString(); /** * The equality operator. Subclasses should provide an * implementation of this method that supports value equality * (do the two Address objects represent the same destination?), * not object reference equality. A subclass must also provide * a corresponding implementation of the <code>hashCode</code> * method that preserves the general contract of * <code>equals</code> and <code>hashCode</code> - objects that * compare as equal must have the same hashCode. * * @param address Address object */ @Override public abstract boolean equals(Object address); }