notifi listen node set sibl chang wai node chang locat tree alter children arrai attribut chang affect present indic root chang child indic children em note em swing method invok swing awt event thread param sourc object respons gener event typic creator event object pass valu param path arrai object identifi path parent modifi item element arrai object store root node element object store parent node param child indic arrai specifi index valu remov item indic sort order lowest highest param children arrai object contain insert remov chang object tree model listen tree node chang tree model event tree node chang object sourc object path child indic object children guarante non arrai object listen listen list listen list tree model event process listen notifi interest event listen length listen tree model listen lazili creat event tree model event sourc path child indic children tree model listen listen tree node chang 