53 lines
2.0 KiB
Java
53 lines
2.0 KiB
Java
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/*
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* Copyright (c) 1994, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.util;
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/**
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* A class can implement the {@code Observer} interface when it
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* wants to be informed of changes in observable objects.
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*
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* @author Chris Warth
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* @see java.util.Observable
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* @since 1.0
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*
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* @deprecated
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* This interface has been deprecated. See the {@link Observable}
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* class for further information.
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*/
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@Deprecated(since="9")
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public interface Observer {
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/**
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* This method is called whenever the observed object is changed. An
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* application calls an {@code Observable} object's
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* {@code notifyObservers} method to have all the object's
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* observers notified of the change.
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*
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* @param o the observable object.
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* @param arg an argument passed to the {@code notifyObservers}
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* method.
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*/
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void update(Observable o, Object arg);
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}
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