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JDK 1.1 Source Code Directory
JDK 1.1 source code directory contains Java source code for JDK 1.1 core classes: "C:\fyicenter\jdk-1.1.8\src".
Here is the list of Java classes of the JDK 1.1 source code:
✍: FYIcenter
⏎ java/util/Observable.java
/* * @(#)Observable.java 1.21 01/12/10 * * Copyright 2002 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package java.util; /** * This class represents an observable object, or "data" * in the model-view paradigm. It can be subclassed to represent an * object that the application wants to have observed. * <p> * An observable object can have one or more observers. After an * observable instance changes, an application calling the * <code>Observable</code>'s <code>notifyObservers</code> method * causes all of its observers to be notified of the change by a call * to their <code>update</code> method. * * @author Chris Warth * @version 1.21, 12/10/01 * @see java.util.Observable#notifyObservers() * @see java.util.Observable#notifyObservers(java.lang.Object) * @see java.util.Observer * @see java.util.Observer#update(java.util.Observable, java.lang.Object) * @since JDK1.0 */ public class Observable { private boolean changed = false; private Vector obs; /* a temporary array buffer, used as a snapshot of the state of * current Observers. We do notifications on this snapshot while * not under synchronization. */ private Observer[] arr = new Observer[2]; /** Construct an Observable with zero Observers */ public Observable() { obs = new Vector(); } /** * Adds an observer to the set of observers for this object. * * @param o an observer to be added. * @since JDK1.0 */ public synchronized void addObserver(Observer o) { if (!obs.contains(o)) { obs.addElement(o); } } /** * Deletes an observer from the set of observers of this object. * * @param o the observer to be deleted. * @since JDK1.0 */ public synchronized void deleteObserver(Observer o) { obs.removeElement(o); } /** * If this object has changed, as indicated by the * <code>hasChanged</code> method, then notify all of its observers * and then call the <code>clearChanged</code> method to * indicate that this object has no longer changed. * <p> * Each observer has its <code>update</code> method called with two * arguments: this observable object and <code>null</code>. * * @see java.util.Observable#clearChanged() * @see java.util.Observable#hasChanged() * @see java.util.Observer#update(java.util.Observable, java.lang.Object) * @since JDK1.0 */ public void notifyObservers() { notifyObservers(null); } /** * If this object has changed, as indicated by the * <code>hasChanged</code> method, then notify all of its observers * and then call the <code>clearChanged</code> method to indicate * that this object has no longer changed. * <p> * Each observer has its <code>update</code> method called with two * arguments: this observable object and the <code>arg</code> argument. * * @param arg any object. * @see java.util.Observable#clearChanged() * @see java.util.Observable#hasChanged() * @see java.util.Observer#update(java.util.Observable, java.lang.Object) * @since JDK1.0 */ public void notifyObservers(Object arg) { int size=0; synchronized (this) { /* We don't want the Observer doing callbacks into * into arbitrary code while holding its own Monitor. * The code where we extract each Observable from * the Vector and store the state of the Observer * needs synchronization, but notifying observers * does not (should not). The worst result of any * potential race-condition here is that: * 1) a newly-added Observer will miss a * notification in progress * 2) a recently unregistered Observer will be * wrongly notified when it doesn't care */ if (!hasChanged()) return; size = obs.size(); if (size > arr.length) { arr = new Observer[size]; } obs.copyInto(arr); clearChanged(); } for (int i = size -1; i>=0; i--) { if (arr[i] != null) { arr[i].update(this, arg); } } } /** * Clears the observer list so that this object no longer has any observers. * * @since JDK1.0 */ public synchronized void deleteObservers() { obs.removeAllElements(); } /** * Indicates that this object has changed. * * @since JDK1.0 */ protected synchronized void setChanged() { changed = true; } /** * Indicates that this object has no longer changed, or that it has * already notified all of its observers of its most recent change. * This method is called automatically by the * <code>notifyObservers</code> methods. * * @see java.util.Observable#notifyObservers() * @see java.util.Observable#notifyObservers(java.lang.Object) * @since JDK1.0 */ protected synchronized void clearChanged() { changed = false; } /** * Tests if this object has changed. * * @return <code>true</code> if the <code>setChanged</code> method * has been called more recently than the <code>clearChanged</code> * method on this object; <code>false</code> otherwise. * @see java.util.Observable#clearChanged() * @see java.util.Observable#setChanged() * @since JDK1.0 */ public synchronized boolean hasChanged() { return changed; } /** * Returns the number of observers of this object. * * @return the number of observers of this object. * @since JDK1.0 */ public synchronized int countObservers() { return obs.size(); } }
⏎ java/util/Observable.java
Or download all of them as a single archive file:
File name: jdk-1.1.8-src.zip File size: 1574187 bytes Release date: 2018-11-16 Download
⇒ Backup JDK 1.1 Installation Directory
2018-11-17, 159761👍, 0💬
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