ChangeListeners are way to manually monitor a Property for changes in its value, and then to trigger some code when a change happens. Generally speaking, Bindings are much preferred over listeners, but there are times when only a listener will work. The reason for this is that Bindings link “State”, while ChangeListeners transform changes in “State” to actions. Programming to State is usually better, but events work better in some circumstances, such as when you need to deal with some part of your application outside the JavaFX domain that doesn’t understand JavaFX observables.

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