The Java Developers Almanac 1.4


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Home > List of Packages > java.beans  [12 examples] > Events  [2 examples]

e11. Listening for a Property Change Event

A property change event is fired when a bound property is changed.
    // Register for property change events on the bean
    bean.addPropertyChangeListener(new MyPropertyChangeListener());
    
    class MyPropertyChangeListener implements PropertyChangeListener {
        // This method is called every time the property value is changed
        public void propertyChange(PropertyChangeEvent evt) {
            // Get the old value of the property
            Object oldValue = evt.getOldValue();
    
            // Get the new value of the property
            Object newValue = evt.getNewValue();
        }
    }

 Related Examples
e12. Listening for a Vetoable Property Change Event

See also: Serialization   


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