995         if (l == null) {
 996             return;
 997         }
 998         adjustmentListener = AWTEventMulticaster.remove(adjustmentListener, l);
 999     }
1000 
1001     /**
1002      * Returns an array of all the adjustment listeners
1003      * registered on this scrollbar.
1004      *
1005      * @return all of this scrollbar's <code>AdjustmentListener</code>s
1006      *         or an empty array if no adjustment
1007      *         listeners are currently registered
1008      * @see             #addAdjustmentListener
1009      * @see             #removeAdjustmentListener
1010      * @see             java.awt.event.AdjustmentEvent
1011      * @see             java.awt.event.AdjustmentListener
1012      * @since 1.4
1013      */
1014     public synchronized AdjustmentListener[] getAdjustmentListeners() {
1015         return (AdjustmentListener[])(getListeners(AdjustmentListener.class));
1016     }
1017 
1018     /**
1019      * Returns an array of all the objects currently registered
1020      * as <code><em>Foo</em>Listener</code>s
1021      * upon this <code>Scrollbar</code>.
1022      * <code><em>Foo</em>Listener</code>s are registered using the
1023      * <code>add<em>Foo</em>Listener</code> method.
1024      * <p>
1025      * You can specify the <code>listenerType</code> argument
1026      * with a class literal,  such as
1027      * <code><em>Foo</em>Listener.class</code>.
1028      * For example, you can query a
1029      * <code>Scrollbar</code> <code>c</code>
1030      * for its mouse listeners with the following code:
1031      *
1032      * <pre>MouseListener[] mls = (MouseListener[])(c.getListeners(MouseListener.class));</pre>
1033      *
1034      * If no such listeners exist, this method returns an empty array.
1035      *

 995         if (l == null) {
 996             return;
 997         }
 998         adjustmentListener = AWTEventMulticaster.remove(adjustmentListener, l);
 999     }
1000 
1001     /**
1002      * Returns an array of all the adjustment listeners
1003      * registered on this scrollbar.
1004      *
1005      * @return all of this scrollbar's <code>AdjustmentListener</code>s
1006      *         or an empty array if no adjustment
1007      *         listeners are currently registered
1008      * @see             #addAdjustmentListener
1009      * @see             #removeAdjustmentListener
1010      * @see             java.awt.event.AdjustmentEvent
1011      * @see             java.awt.event.AdjustmentListener
1012      * @since 1.4
1013      */
1014     public synchronized AdjustmentListener[] getAdjustmentListeners() {
1015         return getListeners(AdjustmentListener.class);
1016     }
1017 
1018     /**
1019      * Returns an array of all the objects currently registered
1020      * as <code><em>Foo</em>Listener</code>s
1021      * upon this <code>Scrollbar</code>.
1022      * <code><em>Foo</em>Listener</code>s are registered using the
1023      * <code>add<em>Foo</em>Listener</code> method.
1024      * <p>
1025      * You can specify the <code>listenerType</code> argument
1026      * with a class literal,  such as
1027      * <code><em>Foo</em>Listener.class</code>.
1028      * For example, you can query a
1029      * <code>Scrollbar</code> <code>c</code>
1030      * for its mouse listeners with the following code:
1031      *
1032      * <pre>MouseListener[] mls = (MouseListener[])(c.getListeners(MouseListener.class));</pre>
1033      *
1034      * If no such listeners exist, this method returns an empty array.
1035      *