question: private void initListeners ( ) { ClassLoader parent = getParent ( ) ; for ( ; parent != null ; parent = parent . getParent ( ) ) { if ( parent instanceof EnvironmentClassLoader ) { EnvironmentClassLoader loader = ( EnvironmentClassLoader ) parent ; if ( _stopListener == null ) _stopListener = new WeakStopListener ( this ) ; loader . addListener ( _stopListener ) ; return ; } } }
target:  Adds self as a listener.