Question

Say you have the following java bean:

public class MyBean {     private List<String> names = new ArrayList<String>();      public void addName(String name)     {         names.add(name);         fireNamesPropertyChange(name);     } } 

How would you normally implement a property change event for a collection? Do you try and use the index property which seems to be more for arrays than collections?

Answer 1

Take a look at Glazed Lists library, which has support for observable collections.

If I were to do it myself, I would likely create custom Listener interface with elementsAdded, elementsRemoved methods, or similar 🙂 (also depending on my needs)