javax swing event tree select listen valu chang javax swing event tree select event chang explor tree select set target target manag valu chang tree select event updat select tree select updat select tree select element tree path ad remov path path tree path select path select path list element list arrai list select path select path length object element mutabl tree node select path path compon user object element list add element scan visibl row duplic elem select row row count row row row row object row item mutabl tree node path row row path compon user object row item element row select row add select row row check targetmanag method set target list ad element arrai list ad remov path length object element mutabl tree node ad remov path path compon user object ad path set target ad element add element set target ad element size element list size element list contain ad element target manag instanc set target element list correct method targetmanag ad remov target list remov target arrai list list ad target arrai list ad remov path length object element mutabl tree node ad remov path path compon user object ad path ad target add element remov target add element remov target remov target iter remov target iter target manag instanc remov target ad target iter ad target iter target manag instanc add target updat select tree select 