// Copyright 2002 Nokia Corporation. // // THIS SOURCE CODE IS PROVIDED 'AS IS', WITH NO WARRANTIES WHATSOEVER, // EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY, FITNESS // FOR ANY PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE // OR TRADE PRACTICE, RELATING TO THE SOURCE CODE OR ANY WARRANTY OTHERWISE // ARISING OUT OF ANY PROPOSAL, SPECIFICATION, OR SAMPLE AND WITH NO // OBLIGATION OF NOKIA TO PROVIDE THE LICENSEE WITH ANY MAINTENANCE OR // SUPPORT. FURTHERMORE, NOKIA MAKES NO WARRANTY THAT EXERCISE OF THE // RIGHTS GRANTED HEREUNDER DOES NOT INFRINGE OR MAY NOT CAUSE INFRINGEMENT // OF ANY PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OWNED OR CONTROLLED // BY THIRD PARTIES // // Furthermore, information provided in this source code is preliminary, // and may be changed substantially prior to final release. Nokia Corporation // retains the right to make changes to this source code at // any time, without notice. This source code is provided for informational // purposes only. // // Nokia and Nokia Connecting People are registered trademarks of Nokia// Corporation.// Java and all Java-based marks are trademarks or registered trademarks of// Sun Microsystems, Inc.// Other product and company names mentioned herein may be trademarks or// trade names of their respective owners.// // A non-exclusive, non-transferable, worldwide, limited license is hereby // granted to the Licensee to download, print, reproduce and modify the // source code. The licensee has the right to market, sell, distribute and // make available the source code in original or modified form only when // incorporated into the programs developed by the Licensee. No other // license, express or implied, by estoppel or otherwise, to any other // intellectual property rights is granted herein.package example.fruitmachine;import java.util.*;public class UserDatabase {    private HashMap users = new HashMap();  // map name -> user    public UserDatabase()    {    }    public User createUser(String name, String password)    {        User user = new User(name, password);        users.put(canonicalForm(name), user);        return user;    }    public void deleteUser(User user)    {        users.remove(canonicalForm(user.getName()));    }    public User getUser(String name)    {        return (User)(users.get(canonicalForm(name)));    }    public Collection getAllUsers()    {        return users.values();    }    // so that we can match names in any case    private String canonicalForm(String name)    {        return name.toLowerCase();    }}