code: public void driveToClass( String classname ) {
          String [] sa = BshClassPath.splitClassname( classname );
          String packn = sa[0];
          String classn = sa[1];
  
          // Do we have the package?
          if ( classPath.getClassesForPackage(packn).size()==0 )
              return;
  
          ptree.setSelectedPackage( packn );
  
          for(int i=0; i< classesList.length; i++) {
              if ( classesList[i].equals(classn) ) {
                  classlist.setSelectedIndex(i);
                  classlist.ensureIndexIsVisible(i);
                  break;
              }
          }
      }
docs: fully qualified classname