Add listener to ArrayList

Question

I have an ArrayList which I add some Objects to it dynamically, and I have a JButton. The ArrayList is empty when running my program and the JButton is set to setEnabled(fal

Answer 1

Javafx (part of JRE 8) provides an observable list implementation. This code works for me:

ObservableList lstAnno1 = FXCollections.observableList(new ArrayList());

lstAnno1.addListener((ListChangeListener.Change c) -> {
   c.next();
   updateAnnotation((List) c.getAddedSubList(), xyPlot);
});

...
lstAnno1.add(new MyAnno(lTs, dValue, strType));
...

public void updateAnnotation(List lstMyAnno, XYPlot xyPlot) {
   lstMyAnno.forEach(d -> {
   ...
   });
}