importjava.util.Vector;privilegedaspectTracingAspect{before(DataClassdc):execution(*DataClass.doit())&&this(dc){Vector<Object>myV=dc.getV();System.err.println("before:Length of v="+myV.size());}after(DataClassdc):execution(*DataClass.doit())&&this(dc){Vector<Object>myV=dc.getV();System.err.println("after:Length of v="+myV.size());}}