public void setLocation(Point newLocation) {
        if ( newLocation == null ) {
            throw new IllegalArgumentException();
        }
        location.setLocation( newLocation );
        firePropertyChange( LOCATION_PROP,
                            null,
                            location );
    }
public void setLocation(Point newLocation) {
        if ( newLocation == null ) {
            throw new IllegalArgumentException();
        }
        location.setLocation( newLocation );
        firePropertyChange( LOCATION_PROP,
                            null,
                            location );
    }
public void setLocation ( Point newLocation ) { if ( newLocation == null ) { throw new IllegalArgumentException ( ) ; } location . setLocation ( newLocation ) ; firePropertyChange ( LOCATION_PROP , null , location ) ; }
Set the Location of this vertex.
@param newLocation a non-null Point instance
@throws IllegalArgumentException if the parameter is null
Set the Location of this vertex .