/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in the *     documentation and/or other materials provided with the distribution. * *   - Neither the name of Sun Microsystems nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ import java.lang.reflect.Constructor;import java.lang.reflect.Field;import java.lang.reflect.InvocationTargetException;import java.util.HashMap;import java.util.Map;import java.util.Set;import static java.lang.System.out;class EmailAliases {    private Set<String> aliases;    private EmailAliases(HashMap<String, String> h) {	aliases = h.keySet();    }    public void printKeys() {	out.format("Mail keys:%n");	for (String k : aliases)	    out.format("  %s%n", k);    }}public class RestoreAliases {    private static Map<String, String> defaultAliases = new HashMap<String, String>();    static {	defaultAliases.put("Duke", "duke@i-love-java");	defaultAliases.put("Fang", "fang@evil-jealous-twin");    }    public static void main(String... args) {	try {	    Constructor ctor = EmailAliases.class.getDeclaredConstructor(HashMap.class);	    ctor.setAccessible(true);	    EmailAliases email = (EmailAliases)ctor.newInstance(defaultAliases);	    email.printKeys();        // production code should handle these exceptions more gracefully	} catch (InstantiationException x) {	    x.printStackTrace();	} catch (IllegalAccessException x) {	    x.printStackTrace();	} catch (InvocationTargetException x) {	    x.printStackTrace();	} catch (NoSuchMethodException x) {	    x.printStackTrace();	}    }}