Package Summary Overview Summary

class:Observer [NONE]

```
@Deprecated(since="9")
public interface Observer
```
Deprecated.
This interface has been deprecated. See the Observable class for further information.

A class can implement the Observer interface when it wants to be informed of changes in observable objects.

Since:

1.0

See Also:

Observable

method:update(java.util.Observable,java.lang.Object) [NONE]

update
```
void update(Observable o,
            Object arg)
```
Deprecated.

This method is called whenever the observed object is changed. An application calls an Observable object's notifyObservers method to have all the object's observers notified of the change.

Parameters:

o - the observable object.

arg - an argument passed to the notifyObservers method.

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