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JRE 8 rt.jar - java.* Package Source Code
JRE 8 rt.jar is the JAR file for JRE 8 RT (Runtime) libraries. JRE (Java Runtime) 8 is the runtime environment included in JDK 8. JRE 8 rt.jar libraries are divided into 6 packages:
com.* - Internal Oracle and Sun Microsystems libraries java.* - Standard Java API libraries. javax.* - Extended Java API libraries. jdk.* - JDK supporting libraries. org.* - Third party libraries. sun.* - Old libraries developed by Sun Microsystems.
JAR File Information:
Directory of C:\fyicenter\jdk-1.8.0_191\jre\lib 63,596,151 rt.jar
Here is the list of Java classes of the java.* package in JRE 1.8.0_191 rt.jar. Java source codes are also provided.
✍: FYIcenter
⏎ java/awt/AWTEventMulticaster.java
/* * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package java.awt; import java.awt.event.*; import java.lang.reflect.Array; import java.util.EventListener; import java.io.Serializable; import java.io.ObjectOutputStream; import java.io.IOException; import java.util.EventListener; /** * {@code AWTEventMulticaster} implements efficient and thread-safe multi-cast * event dispatching for the AWT events defined in the {@code java.awt.event} * package. * <p> * The following example illustrates how to use this class: * * <pre><code> * public myComponent extends Component { * ActionListener actionListener = null; * * public synchronized void addActionListener(ActionListener l) { * actionListener = AWTEventMulticaster.add(actionListener, l); * } * public synchronized void removeActionListener(ActionListener l) { * actionListener = AWTEventMulticaster.remove(actionListener, l); * } * public void processEvent(AWTEvent e) { * // when event occurs which causes "action" semantic * ActionListener listener = actionListener; * if (listener != null) { * listener.actionPerformed(new ActionEvent()); * } * } * } * </code></pre> * The important point to note is the first argument to the {@code * add} and {@code remove} methods is the field maintaining the * listeners. In addition you must assign the result of the {@code add} * and {@code remove} methods to the field maintaining the listeners. * <p> * {@code AWTEventMulticaster} is implemented as a pair of {@code * EventListeners} that are set at construction time. {@code * AWTEventMulticaster} is immutable. The {@code add} and {@code * remove} methods do not alter {@code AWTEventMulticaster} in * anyway. If necessary, a new {@code AWTEventMulticaster} is * created. In this way it is safe to add and remove listeners during * the process of an event dispatching. However, event listeners * added during the process of an event dispatch operation are not * notified of the event currently being dispatched. * <p> * All of the {@code add} methods allow {@code null} arguments. If the * first argument is {@code null}, the second argument is returned. If * the first argument is not {@code null} and the second argument is * {@code null}, the first argument is returned. If both arguments are * {@code non-null}, a new {@code AWTEventMulticaster} is created using * the two arguments and returned. * <p> * For the {@code remove} methods that take two arguments, the following is * returned: * <ul> * <li>{@code null}, if the first argument is {@code null}, or * the arguments are equal, by way of {@code ==}. * <li>the first argument, if the first argument is not an instance of * {@code AWTEventMulticaster}. * <li>result of invoking {@code remove(EventListener)} on the * first argument, supplying the second argument to the * {@code remove(EventListener)} method. * </ul> * <p>Swing makes use of * {@link javax.swing.event.EventListenerList EventListenerList} for * similar logic. Refer to it for details. * * @see javax.swing.event.EventListenerList * * @author John Rose * @author Amy Fowler * @since 1.1 */ public class AWTEventMulticaster implements ComponentListener, ContainerListener, FocusListener, KeyListener, MouseListener, MouseMotionListener, WindowListener, WindowFocusListener, WindowStateListener, ActionListener, ItemListener, AdjustmentListener, TextListener, InputMethodListener, HierarchyListener, HierarchyBoundsListener, MouseWheelListener { protected final EventListener a, b; /** * Creates an event multicaster instance which chains listener-a * with listener-b. Input parameters <code>a</code> and <code>b</code> * should not be <code>null</code>, though implementations may vary in * choosing whether or not to throw <code>NullPointerException</code> * in that case. * @param a listener-a * @param b listener-b */ protected AWTEventMulticaster(EventListener a, EventListener b) { this.a = a; this.b = b; } /** * Removes a listener from this multicaster. * <p> * The returned multicaster contains all the listeners in this * multicaster with the exception of all occurrences of {@code oldl}. * If the resulting multicaster contains only one regular listener * the regular listener may be returned. If the resulting multicaster * is empty, then {@code null} may be returned instead. * <p> * No exception is thrown if {@code oldl} is {@code null}. * * @param oldl the listener to be removed * @return resulting listener */ protected EventListener remove(EventListener oldl) { if (oldl == a) return b; if (oldl == b) return a; EventListener a2 = removeInternal(a, oldl); EventListener b2 = removeInternal(b, oldl); if (a2 == a && b2 == b) { return this; // it's not here } return addInternal(a2, b2); } /** * Handles the componentResized event by invoking the * componentResized methods on listener-a and listener-b. * @param e the component event */ public void componentResized(ComponentEvent e) { ((ComponentListener)a).componentResized(e); ((ComponentListener)b).componentResized(e); } /** * Handles the componentMoved event by invoking the * componentMoved methods on listener-a and listener-b. * @param e the component event */ public void componentMoved(ComponentEvent e) { ((ComponentListener)a).componentMoved(e); ((ComponentListener)b).componentMoved(e); } /** * Handles the componentShown event by invoking the * componentShown methods on listener-a and listener-b. * @param e the component event */ public void componentShown(ComponentEvent e) { ((ComponentListener)a).componentShown(e); ((ComponentListener)b).componentShown(e); } /** * Handles the componentHidden event by invoking the * componentHidden methods on listener-a and listener-b. * @param e the component event */ public void componentHidden(ComponentEvent e) { ((ComponentListener)a).componentHidden(e); ((ComponentListener)b).componentHidden(e); } /** * Handles the componentAdded container event by invoking the * componentAdded methods on listener-a and listener-b. * @param e the component event */ public void componentAdded(ContainerEvent e) { ((ContainerListener)a).componentAdded(e); ((ContainerListener)b).componentAdded(e); } /** * Handles the componentRemoved container event by invoking the * componentRemoved methods on listener-a and listener-b. * @param e the component event */ public void componentRemoved(ContainerEvent e) { ((ContainerListener)a).componentRemoved(e); ((ContainerListener)b).componentRemoved(e); } /** * Handles the focusGained event by invoking the * focusGained methods on listener-a and listener-b. * @param e the focus event */ public void focusGained(FocusEvent e) { ((FocusListener)a).focusGained(e); ((FocusListener)b).focusGained(e); } /** * Handles the focusLost event by invoking the * focusLost methods on listener-a and listener-b. * @param e the focus event */ public void focusLost(FocusEvent e) { ((FocusListener)a).focusLost(e); ((FocusListener)b).focusLost(e); } /** * Handles the keyTyped event by invoking the * keyTyped methods on listener-a and listener-b. * @param e the key event */ public void keyTyped(KeyEvent e) { ((KeyListener)a).keyTyped(e); ((KeyListener)b).keyTyped(e); } /** * Handles the keyPressed event by invoking the * keyPressed methods on listener-a and listener-b. * @param e the key event */ public void keyPressed(KeyEvent e) { ((KeyListener)a).keyPressed(e); ((KeyListener)b).keyPressed(e); } /** * Handles the keyReleased event by invoking the * keyReleased methods on listener-a and listener-b. * @param e the key event */ public void keyReleased(KeyEvent e) { ((KeyListener)a).keyReleased(e); ((KeyListener)b).keyReleased(e); } /** * Handles the mouseClicked event by invoking the * mouseClicked methods on listener-a and listener-b. * @param e the mouse event */ public void mouseClicked(MouseEvent e) { ((MouseListener)a).mouseClicked(e); ((MouseListener)b).mouseClicked(e); } /** * Handles the mousePressed event by invoking the * mousePressed methods on listener-a and listener-b. * @param e the mouse event */ public void mousePressed(MouseEvent e) { ((MouseListener)a).mousePressed(e); ((MouseListener)b).mousePressed(e); } /** * Handles the mouseReleased event by invoking the * mouseReleased methods on listener-a and listener-b. * @param e the mouse event */ public void mouseReleased(MouseEvent e) { ((MouseListener)a).mouseReleased(e); ((MouseListener)b).mouseReleased(e); } /** * Handles the mouseEntered event by invoking the * mouseEntered methods on listener-a and listener-b. * @param e the mouse event */ public void mouseEntered(MouseEvent e) { ((MouseListener)a).mouseEntered(e); ((MouseListener)b).mouseEntered(e); } /** * Handles the mouseExited event by invoking the * mouseExited methods on listener-a and listener-b. * @param e the mouse event */ public void mouseExited(MouseEvent e) { ((MouseListener)a).mouseExited(e); ((MouseListener)b).mouseExited(e); } /** * Handles the mouseDragged event by invoking the * mouseDragged methods on listener-a and listener-b. * @param e the mouse event */ public void mouseDragged(MouseEvent e) { ((MouseMotionListener)a).mouseDragged(e); ((MouseMotionListener)b).mouseDragged(e); } /** * Handles the mouseMoved event by invoking the * mouseMoved methods on listener-a and listener-b. * @param e the mouse event */ public void mouseMoved(MouseEvent e) { ((MouseMotionListener)a).mouseMoved(e); ((MouseMotionListener)b).mouseMoved(e); } /** * Handles the windowOpened event by invoking the * windowOpened methods on listener-a and listener-b. * @param e the window event */ public void windowOpened(WindowEvent e) { ((WindowListener)a).windowOpened(e); ((WindowListener)b).windowOpened(e); } /** * Handles the windowClosing event by invoking the * windowClosing methods on listener-a and listener-b. * @param e the window event */ public void windowClosing(WindowEvent e) { ((WindowListener)a).windowClosing(e); ((WindowListener)b).windowClosing(e); } /** * Handles the windowClosed event by invoking the * windowClosed methods on listener-a and listener-b. * @param e the window event */ public void windowClosed(WindowEvent e) { ((WindowListener)a).windowClosed(e); ((WindowListener)b).windowClosed(e); } /** * Handles the windowIconified event by invoking the * windowIconified methods on listener-a and listener-b. * @param e the window event */ public void windowIconified(WindowEvent e) { ((WindowListener)a).windowIconified(e); ((WindowListener)b).windowIconified(e); } /** * Handles the windowDeiconfied event by invoking the * windowDeiconified methods on listener-a and listener-b. * @param e the window event */ public void windowDeiconified(WindowEvent e) { ((WindowListener)a).windowDeiconified(e); ((WindowListener)b).windowDeiconified(e); } /** * Handles the windowActivated event by invoking the * windowActivated methods on listener-a and listener-b. * @param e the window event */ public void windowActivated(WindowEvent e) { ((WindowListener)a).windowActivated(e); ((WindowListener)b).windowActivated(e); } /** * Handles the windowDeactivated event by invoking the * windowDeactivated methods on listener-a and listener-b. * @param e the window event */ public void windowDeactivated(WindowEvent e) { ((WindowListener)a).windowDeactivated(e); ((WindowListener)b).windowDeactivated(e); } /** * Handles the windowStateChanged event by invoking the * windowStateChanged methods on listener-a and listener-b. * @param e the window event * @since 1.4 */ public void windowStateChanged(WindowEvent e) { ((WindowStateListener)a).windowStateChanged(e); ((WindowStateListener)b).windowStateChanged(e); } /** * Handles the windowGainedFocus event by invoking the windowGainedFocus * methods on listener-a and listener-b. * @param e the window event * @since 1.4 */ public void windowGainedFocus(WindowEvent e) { ((WindowFocusListener)a).windowGainedFocus(e); ((WindowFocusListener)b).windowGainedFocus(e); } /** * Handles the windowLostFocus event by invoking the windowLostFocus * methods on listener-a and listener-b. * @param e the window event * @since 1.4 */ public void windowLostFocus(WindowEvent e) { ((WindowFocusListener)a).windowLostFocus(e); ((WindowFocusListener)b).windowLostFocus(e); } /** * Handles the actionPerformed event by invoking the * actionPerformed methods on listener-a and listener-b. * @param e the action event */ public void actionPerformed(ActionEvent e) { ((ActionListener)a).actionPerformed(e); ((ActionListener)b).actionPerformed(e); } /** * Handles the itemStateChanged event by invoking the * itemStateChanged methods on listener-a and listener-b. * @param e the item event */ public void itemStateChanged(ItemEvent e) { ((ItemListener)a).itemStateChanged(e); ((ItemListener)b).itemStateChanged(e); } /** * Handles the adjustmentValueChanged event by invoking the * adjustmentValueChanged methods on listener-a and listener-b. * @param e the adjustment event */ public void adjustmentValueChanged(AdjustmentEvent e) { ((AdjustmentListener)a).adjustmentValueChanged(e); ((AdjustmentListener)b).adjustmentValueChanged(e); } public void textValueChanged(TextEvent e) { ((TextListener)a).textValueChanged(e); ((TextListener)b).textValueChanged(e); } /** * Handles the inputMethodTextChanged event by invoking the * inputMethodTextChanged methods on listener-a and listener-b. * @param e the item event */ public void inputMethodTextChanged(InputMethodEvent e) { ((InputMethodListener)a).inputMethodTextChanged(e); ((InputMethodListener)b).inputMethodTextChanged(e); } /** * Handles the caretPositionChanged event by invoking the * caretPositionChanged methods on listener-a and listener-b. * @param e the item event */ public void caretPositionChanged(InputMethodEvent e) { ((InputMethodListener)a).caretPositionChanged(e); ((InputMethodListener)b).caretPositionChanged(e); } /** * Handles the hierarchyChanged event by invoking the * hierarchyChanged methods on listener-a and listener-b. * @param e the item event * @since 1.3 */ public void hierarchyChanged(HierarchyEvent e) { ((HierarchyListener)a).hierarchyChanged(e); ((HierarchyListener)b).hierarchyChanged(e); } /** * Handles the ancestorMoved event by invoking the * ancestorMoved methods on listener-a and listener-b. * @param e the item event * @since 1.3 */ public void ancestorMoved(HierarchyEvent e) { ((HierarchyBoundsListener)a).ancestorMoved(e); ((HierarchyBoundsListener)b).ancestorMoved(e); } /** * Handles the ancestorResized event by invoking the * ancestorResized methods on listener-a and listener-b. * @param e the item event * @since 1.3 */ public void ancestorResized(HierarchyEvent e) { ((HierarchyBoundsListener)a).ancestorResized(e); ((HierarchyBoundsListener)b).ancestorResized(e); } /** * Handles the mouseWheelMoved event by invoking the * mouseWheelMoved methods on listener-a and listener-b. * @param e the mouse event * @since 1.4 */ public void mouseWheelMoved(MouseWheelEvent e) { ((MouseWheelListener)a).mouseWheelMoved(e); ((MouseWheelListener)b).mouseWheelMoved(e); } /** * Adds component-listener-a with component-listener-b and * returns the resulting multicast listener. * @param a component-listener-a * @param b component-listener-b */ public static ComponentListener add(ComponentListener a, ComponentListener b) { return (ComponentListener)addInternal(a, b); } /** * Adds container-listener-a with container-listener-b and * returns the resulting multicast listener. * @param a container-listener-a * @param b container-listener-b */ public static ContainerListener add(ContainerListener a, ContainerListener b) { return (ContainerListener)addInternal(a, b); } /** * Adds focus-listener-a with focus-listener-b and * returns the resulting multicast listener. * @param a focus-listener-a * @param b focus-listener-b */ public static FocusListener add(FocusListener a, FocusListener b) { return (FocusListener)addInternal(a, b); } /** * Adds key-listener-a with key-listener-b and * returns the resulting multicast listener. * @param a key-listener-a * @param b key-listener-b */ public static KeyListener add(KeyListener a, KeyListener b) { return (KeyListener)addInternal(a, b); } /** * Adds mouse-listener-a with mouse-listener-b and * returns the resulting multicast listener. * @param a mouse-listener-a * @param b mouse-listener-b */ public static MouseListener add(MouseListener a, MouseListener b) { return (MouseListener)addInternal(a, b); } /** * Adds mouse-motion-listener-a with mouse-motion-listener-b and * returns the resulting multicast listener. * @param a mouse-motion-listener-a * @param b mouse-motion-listener-b */ public static MouseMotionListener add(MouseMotionListener a, MouseMotionListener b) { return (MouseMotionListener)addInternal(a, b); } /** * Adds window-listener-a with window-listener-b and * returns the resulting multicast listener. * @param a window-listener-a * @param b window-listener-b */ public static WindowListener add(WindowListener a, WindowListener b) { return (WindowListener)addInternal(a, b); } /** * Adds window-state-listener-a with window-state-listener-b * and returns the resulting multicast listener. * @param a window-state-listener-a * @param b window-state-listener-b * @since 1.4 */ public static WindowStateListener add(WindowStateListener a, WindowStateListener b) { return (WindowStateListener)addInternal(a, b); } /** * Adds window-focus-listener-a with window-focus-listener-b * and returns the resulting multicast listener. * @param a window-focus-listener-a * @param b window-focus-listener-b * @since 1.4 */ public static WindowFocusListener add(WindowFocusListener a, WindowFocusListener b) { return (WindowFocusListener)addInternal(a, b); } /** * Adds action-listener-a with action-listener-b and * returns the resulting multicast listener. * @param a action-listener-a * @param b action-listener-b */ public static ActionListener add(ActionListener a, ActionListener b) { return (ActionListener)addInternal(a, b); } /** * Adds item-listener-a with item-listener-b and * returns the resulting multicast listener. * @param a item-listener-a * @param b item-listener-b */ public static ItemListener add(ItemListener a, ItemListener b) { return (ItemListener)addInternal(a, b); } /** * Adds adjustment-listener-a with adjustment-listener-b and * returns the resulting multicast listener. * @param a adjustment-listener-a * @param b adjustment-listener-b */ public static AdjustmentListener add(AdjustmentListener a, AdjustmentListener b) { return (AdjustmentListener)addInternal(a, b); } public static TextListener add(TextListener a, TextListener b) { return (TextListener)addInternal(a, b); } /** * Adds input-method-listener-a with input-method-listener-b and * returns the resulting multicast listener. * @param a input-method-listener-a * @param b input-method-listener-b */ public static InputMethodListener add(InputMethodListener a, InputMethodListener b) { return (InputMethodListener)addInternal(a, b); } /** * Adds hierarchy-listener-a with hierarchy-listener-b and * returns the resulting multicast listener. * @param a hierarchy-listener-a * @param b hierarchy-listener-b * @since 1.3 */ public static HierarchyListener add(HierarchyListener a, HierarchyListener b) { return (HierarchyListener)addInternal(a, b); } /** * Adds hierarchy-bounds-listener-a with hierarchy-bounds-listener-b and * returns the resulting multicast listener. * @param a hierarchy-bounds-listener-a * @param b hierarchy-bounds-listener-b * @since 1.3 */ public static HierarchyBoundsListener add(HierarchyBoundsListener a, HierarchyBoundsListener b) { return (HierarchyBoundsListener)addInternal(a, b); } /** * Adds mouse-wheel-listener-a with mouse-wheel-listener-b and * returns the resulting multicast listener. * @param a mouse-wheel-listener-a * @param b mouse-wheel-listener-b * @since 1.4 */ public static MouseWheelListener add(MouseWheelListener a, MouseWheelListener b) { return (MouseWheelListener)addInternal(a, b); } /** * Removes the old component-listener from component-listener-l and * returns the resulting multicast listener. * @param l component-listener-l * @param oldl the component-listener being removed */ public static ComponentListener remove(ComponentListener l, ComponentListener oldl) { return (ComponentListener) removeInternal(l, oldl); } /** * Removes the old container-listener from container-listener-l and * returns the resulting multicast listener. * @param l container-listener-l * @param oldl the container-listener being removed */ public static ContainerListener remove(ContainerListener l, ContainerListener oldl) { return (ContainerListener) removeInternal(l, oldl); } /** * Removes the old focus-listener from focus-listener-l and * returns the resulting multicast listener. * @param l focus-listener-l * @param oldl the focus-listener being removed */ public static FocusListener remove(FocusListener l, FocusListener oldl) { return (FocusListener) removeInternal(l, oldl); } /** * Removes the old key-listener from key-listener-l and * returns the resulting multicast listener. * @param l key-listener-l * @param oldl the key-listener being removed */ public static KeyListener remove(KeyListener l, KeyListener oldl) { return (KeyListener) removeInternal(l, oldl); } /** * Removes the old mouse-listener from mouse-listener-l and * returns the resulting multicast listener. * @param l mouse-listener-l * @param oldl the mouse-listener being removed */ public static MouseListener remove(MouseListener l, MouseListener oldl) { return (MouseListener) removeInternal(l, oldl); } /** * Removes the old mouse-motion-listener from mouse-motion-listener-l * and returns the resulting multicast listener. * @param l mouse-motion-listener-l * @param oldl the mouse-motion-listener being removed */ public static MouseMotionListener remove(MouseMotionListener l, MouseMotionListener oldl) { return (MouseMotionListener) removeInternal(l, oldl); } /** * Removes the old window-listener from window-listener-l and * returns the resulting multicast listener. * @param l window-listener-l * @param oldl the window-listener being removed */ public static WindowListener remove(WindowListener l, WindowListener oldl) { return (WindowListener) removeInternal(l, oldl); } /** * Removes the old window-state-listener from window-state-listener-l * and returns the resulting multicast listener. * @param l window-state-listener-l * @param oldl the window-state-listener being removed * @since 1.4 */ public static WindowStateListener remove(WindowStateListener l, WindowStateListener oldl) { return (WindowStateListener) removeInternal(l, oldl); } /** * Removes the old window-focus-listener from window-focus-listener-l * and returns the resulting multicast listener. * @param l window-focus-listener-l * @param oldl the window-focus-listener being removed * @since 1.4 */ public static WindowFocusListener remove(WindowFocusListener l, WindowFocusListener oldl) { return (WindowFocusListener) removeInternal(l, oldl); } /** * Removes the old action-listener from action-listener-l and * returns the resulting multicast listener. * @param l action-listener-l * @param oldl the action-listener being removed */ public static ActionListener remove(ActionListener l, ActionListener oldl) { return (ActionListener) removeInternal(l, oldl); } /** * Removes the old item-listener from item-listener-l and * returns the resulting multicast listener. * @param l item-listener-l * @param oldl the item-listener being removed */ public static ItemListener remove(ItemListener l, ItemListener oldl) { return (ItemListener) removeInternal(l, oldl); } /** * Removes the old adjustment-listener from adjustment-listener-l and * returns the resulting multicast listener. * @param l adjustment-listener-l * @param oldl the adjustment-listener being removed */ public static AdjustmentListener remove(AdjustmentListener l, AdjustmentListener oldl) { return (AdjustmentListener) removeInternal(l, oldl); } public static TextListener remove(TextListener l, TextListener oldl) { return (TextListener) removeInternal(l, oldl); } /** * Removes the old input-method-listener from input-method-listener-l and * returns the resulting multicast listener. * @param l input-method-listener-l * @param oldl the input-method-listener being removed */ public static InputMethodListener remove(InputMethodListener l, InputMethodListener oldl) { return (InputMethodListener) removeInternal(l, oldl); } /** * Removes the old hierarchy-listener from hierarchy-listener-l and * returns the resulting multicast listener. * @param l hierarchy-listener-l * @param oldl the hierarchy-listener being removed * @since 1.3 */ public static HierarchyListener remove(HierarchyListener l, HierarchyListener oldl) { return (HierarchyListener) removeInternal(l, oldl); } /** * Removes the old hierarchy-bounds-listener from * hierarchy-bounds-listener-l and returns the resulting multicast * listener. * @param l hierarchy-bounds-listener-l * @param oldl the hierarchy-bounds-listener being removed * @since 1.3 */ public static HierarchyBoundsListener remove(HierarchyBoundsListener l, HierarchyBoundsListener oldl) { return (HierarchyBoundsListener) removeInternal(l, oldl); } /** * Removes the old mouse-wheel-listener from mouse-wheel-listener-l * and returns the resulting multicast listener. * @param l mouse-wheel-listener-l * @param oldl the mouse-wheel-listener being removed * @since 1.4 */ public static MouseWheelListener remove(MouseWheelListener l, MouseWheelListener oldl) { return (MouseWheelListener) removeInternal(l, oldl); } /** * Returns the resulting multicast listener from adding listener-a * and listener-b together. * If listener-a is null, it returns listener-b; * If listener-b is null, it returns listener-a * If neither are null, then it creates and returns * a new AWTEventMulticaster instance which chains a with b. * @param a event listener-a * @param b event listener-b */ protected static EventListener addInternal(EventListener a, EventListener b) { if (a == null) return b; if (b == null) return a; return new AWTEventMulticaster(a, b); } /** * Returns the resulting multicast listener after removing the * old listener from listener-l. * If listener-l equals the old listener OR listener-l is null, * returns null. * Else if listener-l is an instance of AWTEventMulticaster, * then it removes the old listener from it. * Else, returns listener l. * @param l the listener being removed from * @param oldl the listener being removed */ protected static EventListener removeInternal(EventListener l, EventListener oldl) { if (l == oldl || l == null) { return null; } else if (l instanceof AWTEventMulticaster) { return ((AWTEventMulticaster)l).remove(oldl); } else { return l; // it's not here } } /* Serialization support. */ protected void saveInternal(ObjectOutputStream s, String k) throws IOException { if (a instanceof AWTEventMulticaster) { ((AWTEventMulticaster)a).saveInternal(s, k); } else if (a instanceof Serializable) { s.writeObject(k); s.writeObject(a); } if (b instanceof AWTEventMulticaster) { ((AWTEventMulticaster)b).saveInternal(s, k); } else if (b instanceof Serializable) { s.writeObject(k); s.writeObject(b); } } protected static void save(ObjectOutputStream s, String k, EventListener l) throws IOException { if (l == null) { return; } else if (l instanceof AWTEventMulticaster) { ((AWTEventMulticaster)l).saveInternal(s, k); } else if (l instanceof Serializable) { s.writeObject(k); s.writeObject(l); } } /* * Recursive method which returns a count of the number of listeners in * EventListener, handling the (common) case of l actually being an * AWTEventMulticaster. Additionally, only listeners of type listenerType * are counted. Method modified to fix bug 4513402. -bchristi */ private static int getListenerCount(EventListener l, Class<?> listenerType) { if (l instanceof AWTEventMulticaster) { AWTEventMulticaster mc = (AWTEventMulticaster)l; return getListenerCount(mc.a, listenerType) + getListenerCount(mc.b, listenerType); } else { // Only count listeners of correct type return listenerType.isInstance(l) ? 1 : 0; } } /* * Recusive method which populates EventListener array a with EventListeners * from l. l is usually an AWTEventMulticaster. Bug 4513402 revealed that * if l differed in type from the element type of a, an ArrayStoreException * would occur. Now l is only inserted into a if it's of the appropriate * type. -bchristi */ private static int populateListenerArray(EventListener[] a, EventListener l, int index) { if (l instanceof AWTEventMulticaster) { AWTEventMulticaster mc = (AWTEventMulticaster)l; int lhs = populateListenerArray(a, mc.a, index); return populateListenerArray(a, mc.b, lhs); } else if (a.getClass().getComponentType().isInstance(l)) { a[index] = l; return index + 1; } // Skip nulls, instances of wrong class else { return index; } } /** * Returns an array of all the objects chained as * <code><em>Foo</em>Listener</code>s by the specified * <code>java.util.EventListener</code>. * <code><em>Foo</em>Listener</code>s are chained by the * <code>AWTEventMulticaster</code> using the * <code>add<em>Foo</em>Listener</code> method. * If a <code>null</code> listener is specified, this method returns an * empty array. If the specified listener is not an instance of * <code>AWTEventMulticaster</code>, this method returns an array which * contains only the specified listener. If no such listeners are chained, * this method returns an empty array. * * @param l the specified <code>java.util.EventListener</code> * @param listenerType the type of listeners requested; this parameter * should specify an interface that descends from * <code>java.util.EventListener</code> * @return an array of all objects chained as * <code><em>Foo</em>Listener</code>s by the specified multicast * listener, or an empty array if no such listeners have been * chained by the specified multicast listener * @exception NullPointerException if the specified * {@code listenertype} parameter is {@code null} * @exception ClassCastException if <code>listenerType</code> * doesn't specify a class or interface that implements * <code>java.util.EventListener</code> * * @since 1.4 */ @SuppressWarnings("unchecked") public static <T extends EventListener> T[] getListeners(EventListener l, Class<T> listenerType) { if (listenerType == null) { throw new NullPointerException ("Listener type should not be null"); } int n = getListenerCount(l, listenerType); T[] result = (T[])Array.newInstance(listenerType, n); populateListenerArray(result, l, 0); return result; } }
⏎ java/awt/AWTEventMulticaster.java
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⇒ JRE 8 rt.jar - javax.* Package Source Code
2023-08-23, 247526👍, 4💬
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