/*
* Copyright (c) 1995, 2015, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*/
package java.awt;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.Objects;
import java.util.Vector;
import java.util.Locale;
import java.util.EventListener;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.Collections;
import java.awt.peer.ComponentPeer;
import java.awt.peer.ContainerPeer;
import java.awt.peer.LightweightPeer;
import java.awt.image.BufferStrategy;
import java.awt.image.ImageObserver;
import java.awt.image.ImageProducer;
import java.awt.image.ColorModel;
import java.awt.image.VolatileImage;
import java.awt.event.*;
import java.io.Serializable;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.beans.Transient;
import java.awt.im.InputContext;
import java.awt.im.InputMethodRequests;
import java.awt.dnd.DropTarget;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.AccessControlContext;
import javax.accessibility.*;
import java.applet.Applet;
import sun.security.action.GetPropertyAction;
import sun.awt.AppContext;
import sun.awt.AWTAccessor;
import sun.awt.ConstrainableGraphics;
import sun.awt.SubRegionShowable;
import sun.awt.SunToolkit;
import sun.awt.WindowClosingListener;
import sun.awt.CausedFocusEvent;
import sun.awt.EmbeddedFrame;
import sun.awt.dnd.SunDropTargetEvent;
import sun.awt.im.CompositionArea;
import sun.font.FontManager;
import sun.font.FontManagerFactory;
import sun.font.SunFontManager;
import sun.java2d.SunGraphics2D;
import sun.java2d.pipe.Region;
import sun.awt.image.VSyncedBSManager;
import sun.java2d.pipe.hw.ExtendedBufferCapabilities;
import static sun.java2d.pipe.hw.ExtendedBufferCapabilities.VSyncType.*;
import sun.awt.RequestFocusController;
import sun.java2d.SunGraphicsEnvironment;
import sun.util.logging.PlatformLogger;
/**
* A <em>component</em> is an object having a graphical representation
* that can be displayed on the screen and that can interact with the
* user. Examples of components are the buttons, checkboxes, and scrollbars
* of a typical graphical user interface. <p>
* The <code>Component</code> class is the abstract superclass of
* the nonmenu-related Abstract Window Toolkit components. Class
* <code>Component</code> can also be extended directly to create a
* lightweight component. A lightweight component is a component that is
* not associated with a native window. On the contrary, a heavyweight
* component is associated with a native window. The {@link #isLightweight()}
* method may be used to distinguish between the two kinds of the components.
* <p>
* Lightweight and heavyweight components may be mixed in a single component
* hierarchy. However, for correct operating of such a mixed hierarchy of
* components, the whole hierarchy must be valid. When the hierarchy gets
* invalidated, like after changing the bounds of components, or
* adding/removing components to/from containers, the whole hierarchy must be
* validated afterwards by means of the {@link Container#validate()} method
* invoked on the top-most invalid container of the hierarchy.
*
* <h3>Serialization</h3>
* It is important to note that only AWT listeners which conform
* to the <code>Serializable</code> protocol will be saved when
* the object is stored. If an AWT object has listeners that
* aren't marked serializable, they will be dropped at
* <code>writeObject</code> time. Developers will need, as always,
* to consider the implications of making an object serializable.
* One situation to watch out for is this:
* <pre>
* import java.awt.*;
* import java.awt.event.*;
* import java.io.Serializable;
*
* class MyApp implements ActionListener, Serializable
* {
* BigObjectThatShouldNotBeSerializedWithAButton bigOne;
* Button aButton = new Button();
*
* MyApp()
* {
* // Oops, now aButton has a listener with a reference
* // to bigOne!
* aButton.addActionListener(this);
* }
*
* public void actionPerformed(ActionEvent e)
* {
* System.out.println("Hello There");
* }
* }
* </pre>
* In this example, serializing <code>aButton</code> by itself
* will cause <code>MyApp</code> and everything it refers to
* to be serialized as well. The problem is that the listener
* is serializable by coincidence, not by design. To separate
* the decisions about <code>MyApp</code> and the
* <code>ActionListener</code> being serializable one can use a
* nested class, as in the following example:
* <pre>
* import java.awt.*;
* import java.awt.event.*;
* import java.io.Serializable;
*
* class MyApp implements java.io.Serializable
* {
* BigObjectThatShouldNotBeSerializedWithAButton bigOne;
* Button aButton = new Button();
*
* static class MyActionListener implements ActionListener
* {
* public void actionPerformed(ActionEvent e)
* {
* System.out.println("Hello There");
* }
* }
*
* MyApp()
* {
* aButton.addActionListener(new MyActionListener());
* }
* }
* </pre>
* <p>
* <b>Note</b>: For more information on the paint mechanisms utilitized
* by AWT and Swing, including information on how to write the most
* efficient painting code, see
* <a href="http://www.oracle.com/technetwork/java/painting-140037.html">Painting in AWT and Swing</a>.
* <p>
* For details on the focus subsystem, see
* <a href="https://docs.oracle.com/javase/tutorial/uiswing/misc/focus.html">
* How to Use the Focus Subsystem</a>,
* a section in <em>The Java Tutorial</em>, and the
* <a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a>
* for more information.
*
* @author Arthur van Hoff
* @author Sami Shaio
*/
public abstract class Component implements ImageObserver, MenuContainer,
Serializable
{
private static final PlatformLogger log = PlatformLogger.getLogger("java.awt.Component");
private static final PlatformLogger eventLog = PlatformLogger.getLogger("java.awt.event.Component");
private static final PlatformLogger focusLog = PlatformLogger.getLogger("java.awt.focus.Component");
private static final PlatformLogger mixingLog = PlatformLogger.getLogger("java.awt.mixing.Component");
/**
* The peer of the component. The peer implements the component's
* behavior. The peer is set when the <code>Component</code> is
* added to a container that also is a peer.
* @see #addNotify
* @see #removeNotify
*/
transient ComponentPeer peer;
/**
* The parent of the object. It may be <code>null</code>
* for top-level components.
* @see #getParent
*/
transient Container parent;
/**
* The <code>AppContext</code> of the component. Applets/Plugin may
* change the AppContext.
*/
transient AppContext appContext;
/**
* The x position of the component in the parent's coordinate system.
*
* @serial
* @see #getLocation
*/
int x;
/**
* The y position of the component in the parent's coordinate system.
*
* @serial
* @see #getLocation
*/
int y;
/**
* The width of the component.
*
* @serial
* @see #getSize
*/
int width;
/**
* The height of the component.
*
* @serial
* @see #getSize
*/
int height;
/**
* The
java源代码中文注释.zip （2000个子文件） 
java.c 66KB java_md_solinux.c 36KB parse_manifest.c 21KB java_md_common.c 14KB wildcard.c 12KB version_comp.c 10KB main.c 3KB splashscreen_stubs.c 2KB jli_util.c 2KB java.h 9KB manifest_info.h 6KB emessages.h 5KB jli_util.h 3KB defines.h 2KB java_md.h 1KB java_md_solinux.h 1KB splashscreen.h 664B version_comp.h 552B wildcard.h 344B Component.java 369KB Character.java 259KB ConcurrentHashMap.java 256KB Arrays.java 223KB Collections.java 220KB Pattern.java 215KB BigDecimal.java 215KB BaseRowSet.java 210KB ResultSet.java 203KB DateTimeFormatterBuilder.java 195KB Container.java 189KB Formatter.java 187KB DecimalFormat.java 173KB Files.java 165KB BigInteger.java 164KB MethodHandles.java 162KB DatabaseMetaData.java 159KB Window.java 150KB ForkJoinPool.java 148KB ObjectInputStream.java 146KB Class.java 144KB AffineTransform.java 143KB Calendar.java 139KB GregorianCalendar.java 133KB Locale.java 133KB ConcurrentSkipListMap.java 132KB URI.java 131KB CallableStatement.java 131KB ComponentColorModel.java 131KB ResourceBundle.java 130KB KeyboardFocusManager.java 128KB String.java 121KB DualPivotQuicksort.java 114KB TreeMap.java 112KB Toolkit.java 111KB Font.java 106KB X509CertSelector.java 103KB TextLayout.java 102KB ZonedDateTime.java 102KB Path2D.java 101KB RowSet.java 100KB Scanner.java 98KB DateTimeFormatter.java 97KB JapaneseImperialCalendar.java 97KB SimpleDateFormat.java 95KB HashMap.java 94KB File.java 93KB CharacterData00.java 92KB AbstractQueuedSynchronizer.java 91KB LocalDate.java 90KB Math.java 90KB ObjectOutputStream.java 90KB ColorModel.java 89KB Logger.java 88KB GridBagLayout.java 88KB CompletableFuture.java 88KB LocalDateTime.java 88KB ObjectStreamClass.java 86KB Spliterators.java 84KB OffsetDateTime.java 84KB ClassLoader.java 82KB CachedRowSet.java 81KB AbstractQueuedLongSynchronizer.java 79KB ThreadPoolExecutor.java 79KB Raster.java 77KB Thread.java 77KB Nodes.java 77KB MethodHandleImpl.java 76KB LambdaForm.java 74KB KeyStore.java 73KB MethodHandle.java 73KB LogManager.java 73KB SecurityManager.java 73KB Collectors.java 72KB MutableBigInteger.java 71KB Connection.java 71KB SimpleTimeZone.java 69KB LocalTime.java 69KB AbstractPreferences.java 68KB Provider.java 67KB ICC_Profile.java 66KB共 2000 条
- 1
- 2
- 3
- 4
- 5
- 6
- 20
资源评论
