Vector class should provide a findElement method

[pgt, 1/16/1995]

The present interface to the Vector class does not provide a method
to reliably find an element in the Vector. So, I would like to propose
the following extension:
Object findElement( Object elem )

This could be implemented as:

int index = indexOf( elem ) ;

return index >= 0 ? elementAt( index ) : null ;

This needs to be a synchronized method, otherwise the code fragment contains
a race condition.