Examples of java.beans.PropertyChangeSupport.removePropertyChangeListener()

java.beans.PropertyChangeSupport.removePropertyChangeListener()
Remove a PropertyChangeListener from the listener list. This removes a PropertyChangeListener that was registered for all properties. If listener was added more than once to the same event source, it will be notified one less time after being removed. If listener is null, or was never added, no exception is thrown and no action is taken. @param listener The PropertyChangeListener to be removed


        sup.addPropertyChangeListener(l1);


        PropertyChangeListener[] listeners = sup.getPropertyChangeListeners();
        assertEquals(1, listeners.length);
        sup.removePropertyChangeListener(l1);
        listeners = sup.getPropertyChangeListeners();
        assertEquals(0, listeners.length);
        sup.addPropertyChangeListener(l3);
        listeners = sup.getPropertyChangeListeners();
        assertEquals(1, listeners.length);

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        assertEquals(0, prop.getPropertyChangeListeners().length);


        prop.addPropertyChangeListener(lis2);
        assertEquals(1, prop.getPropertyChangeListeners().length);


        prop.removePropertyChangeListener("name", lis1);
        assertEquals(0, prop.getPropertyChangeListeners().length);
    }


    /**
     * @tests java.beans.PropertyChangeSupport#removePropertyChangeListener(

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        pcs.addPropertyChangeListener("property", listener);
        PropertyChangeListener[] listeners = pcs.getPropertyChangeListeners();
        assertEquals(1, listeners.length);


        pcs.removePropertyChangeListener(listeners[0]);
        listeners = pcs.getPropertyChangeListeners();
        assertEquals(0, listeners.length);
    }


    /**

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        listeners = sup.getPropertyChangeListeners();
        assertEquals(0, listeners.length);
        sup.addPropertyChangeListener(l3);
        listeners = sup.getPropertyChangeListeners();
        assertEquals(1, listeners.length);
        sup.removePropertyChangeListener(l3);
        listeners = sup.getPropertyChangeListeners();
        assertEquals(0, listeners.length);
        sup.addPropertyChangeListener("myProp3", l2);
        listeners = sup.getPropertyChangeListeners();
        assertEquals(1, listeners.length);

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        listeners = sup.getPropertyChangeListeners();
        assertEquals(0, listeners.length);
        sup.addPropertyChangeListener("myProp3", l2);
        listeners = sup.getPropertyChangeListeners();
        assertEquals(1, listeners.length);
        sup.removePropertyChangeListener(l2);
        listeners = sup.getPropertyChangeListeners();
        assertEquals(1, listeners.length);
        sup.removePropertyChangeListener(listeners[0]);
        listeners = sup.getPropertyChangeListeners();
        assertEquals(0, listeners.length);

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        listeners = sup.getPropertyChangeListeners();
        assertEquals(1, listeners.length);
        sup.removePropertyChangeListener(l2);
        listeners = sup.getPropertyChangeListeners();
        assertEquals(1, listeners.length);
        sup.removePropertyChangeListener(listeners[0]);
        listeners = sup.getPropertyChangeListeners();
        assertEquals(0, listeners.length);
    }


    /*

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     */
    public void testRemovePropertyChangeListener_PropertyChangeListener_Null() {
        Object src = new Object();
        PropertyChangeSupport sup = new PropertyChangeSupport(src);


        sup.removePropertyChangeListener(null);
        assertEquals(0, sup.getPropertyChangeListeners().length);
        sup.addPropertyChangeListener(null);
        assertEquals(0, sup.getPropertyChangeListeners().length);
        sup.removePropertyChangeListener(null);
        assertEquals(0, sup.getPropertyChangeListeners().length);

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        sup.removePropertyChangeListener(null);
        assertEquals(0, sup.getPropertyChangeListeners().length);
        sup.addPropertyChangeListener(null);
        assertEquals(0, sup.getPropertyChangeListeners().length);
        sup.removePropertyChangeListener(null);
        assertEquals(0, sup.getPropertyChangeListeners().length);
    }


    /*
     * Test the method removePropertyChangeListener(PropertyChangeListener)

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     * with a non-registered listener parameter.
     */
    public void testRemovePropertyChangeListener_PropertyChangeListener_NonRegistered() {
        Object src = new Object();
        PropertyChangeSupport sup = new PropertyChangeSupport(src);
        sup.removePropertyChangeListener(new MockPropertyChangeListener());
        assertEquals(0, sup.getPropertyChangeListeners().length);
    }


    /*
     * Test the method removePropertyChangeListener(PropertyChangeListener,

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        MockPropertyChangeListener l1 = new MockPropertyChangeListener(src,
                "myProp", oldValue, newValue);


        sup.addPropertyChangeListener(l1);


        sup.removePropertyChangeListener("myProp", l1);
        assertEquals(1, sup.getPropertyChangeListeners().length);
        assertEquals(0, sup.getPropertyChangeListeners("myProp").length);
        sup.firePropertyChange("myProp", oldValue, newValue);
        l1.assertCalled();
    }

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