event driven in java and IBM java theory and practice column December 21, 2011July 2, 2022 http://www.java2s.com/Code/Java/Event/Eventsourceandlistener.htm http://www.ibm.com/developerworks/views/java/libraryview.jsp?type_by=Articles?sort_order=desc&expand=&sort_by=Date&show_abstract=true&view_by=Search&search_by=practice%3A