This section illustrates you to determine when a Preference Node is added or removed. You can see in the given example that we have add a new node by using the method userRoot().node("/Hello World"). The method exportSubtree(System.out) will show you the added node in the Preference tree. In order to remove the added node, we have used the method removeNode() which removes this preference node and display the message on the console.
Here is the code of AddedOrRemoved.java
Output will be displayed as:
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