Showing the changes to java/pkg/java/util/EventObject.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,78 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (c) 1996, 2003, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package java.util; | ||
| 27 | |||
| 28 | /** | ||
| 29 | * <p> | ||
| 30 | * The root class from which all event state objects shall be derived. | ||
| 31 | * <p> | ||
| 32 | * All Events are constructed with a reference to the object, the "source", | ||
| 33 | * that is logically deemed to be the object upon which the Event in question | ||
| 34 | * initially occurred upon. | ||
| 35 | * | ||
| 36 | * @since JDK1.1 | ||
| 37 | */ | ||
| 38 | |||
| 39 | public class EventObject implements java.io.Serializable { | ||
| 40 | |||
| 41 | private static final long serialVersionUID = 5516075349620653480L; | ||
| 42 | |||
| 43 | /** | ||
| 44 | * The object on which the Event initially occurred. | ||
| 45 | */ | ||
| 46 | protected transient Object source; | ||
| 47 | |||
| 48 | /** | ||
| 49 | * Constructs a prototypical Event. | ||
| 50 | * | ||
| 51 | * @param source The object on which the Event initially occurred. | ||
| 52 | * @exception IllegalArgumentException if source is null. | ||
| 53 | */ | ||
| 54 | public EventObject(Object source) { | ||
| 55 | if (source == null) | ||
| 56 | throw new IllegalArgumentException("null source"); | ||
| 57 | |||
| 58 | this.source = source; | ||
| 59 | } | ||
| 60 | |||
| 61 | /** | ||
| 62 | * The object on which the Event initially occurred. | ||
| 63 | * | ||
| 64 | * @return The object on which the Event initially occurred. | ||
| 65 | */ | ||
| 66 | public Object getSource() { | ||
| 67 | return source; | ||
| 68 | } | ||
| 69 | |||
| 70 | /** | ||
| 71 | * Returns a String representation of this EventObject. | ||
| 72 | * | ||
| 73 | * @return A a String representation of this EventObject. | ||
| 74 | */ | ||
| 75 | public String toString() { | ||
| 76 | return getClass().getName() + "[source=" + source + "]"; | ||
| 77 | } | ||
| 78 | } | ||