79 lines
2.5 KiB
Java
79 lines
2.5 KiB
Java
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/*
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* Copyright 1996-2003 Sun Microsystems, Inc. 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. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package java.util;
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/**
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* <p>
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* The root class from which all event state objects shall be derived.
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* <p>
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* All Events are constructed with a reference to the object, the "source",
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* that is logically deemed to be the object upon which the Event in question
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* initially occurred upon.
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*
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* @since JDK1.1
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*/
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public class EventObject implements java.io.Serializable {
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private static final long serialVersionUID = 5516075349620653480L;
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/**
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* The object on which the Event initially occurred.
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*/
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protected transient Object source;
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/**
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* Constructs a prototypical Event.
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*
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* @param source The object on which the Event initially occurred.
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* @exception IllegalArgumentException if source is null.
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*/
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public EventObject(Object source) {
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if (source == null)
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throw new IllegalArgumentException("null source");
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this.source = source;
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}
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/**
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* The object on which the Event initially occurred.
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*
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* @return The object on which the Event initially occurred.
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*/
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public Object getSource() {
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return source;
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}
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/**
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* Returns a String representation of this EventObject.
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*
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* @return A a String representation of this EventObject.
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*/
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public String toString() {
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return getClass().getName() + "[source=" + source + "]";
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}
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}
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