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79 lines
1.6 KiB
79 lines
1.6 KiB
/*
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* Copyright (c) 1996, 2003, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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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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