{"id":36060,"date":"2018-02-09T03:01:11","date_gmt":"2018-02-08T17:01:11","guid":{"rendered":"http:\/\/www.rjmprogramming.com.au\/ITblog\/?p=36060"},"modified":"2018-02-09T05:14:37","modified_gmt":"2018-02-08T19:14:37","slug":"netbeans-java-restful-message-board-update-tutorial","status":"publish","type":"post","link":"https:\/\/www.rjmprogramming.com.au\/ITblog\/netbeans-java-restful-message-board-update-tutorial\/","title":{"rendered":"NetBeans Java RESTful Message Board Update Tutorial"},"content":{"rendered":"
\"NetBeans<\/a>

NetBeans Java RESTful Message Board Update Tutorial<\/p><\/div>\n

Yesterday’s NetBeans Java RESTful Message Board Primer Tutorial<\/a> had us set up a Message Board web service application in Java and built via the NetBeans<\/a> IDE. Did the look of its functionality remind you of the basics of SQL DML<\/a> (Data manipulation language) functionality? DML SQL statements start with the following verbs …<\/p>\n

    \n
  1. SELECT<\/li>\n
  2. INSERT<\/li>\n
  3. UPDATE<\/b><\/li>\n
  4. DELETE<\/li>\n<\/ol>\n

    … but, yes, UPDATE<\/b> was missing, and today, we extend the Sample NetBeans code for this web application by writing our own UPDATE<\/b> logic. We shouldn’t need any “new” web services we figure, just rearranged use of “old” web services. It’s just that UPDATE<\/b> is that slightly different idea, the only “compound” DML verb, you might say, as it is a combination of SELECT (covered by a new HTML input type=text onblur event triggering the getMessage<\/i> logic, whose results are analyzed to populate a message HTML input type=text that the user can change as required, to clear the way for), perhaps even a DELETE, and then an INSERT at a database position (which is a modified addMessage<\/i> call). No wonder it was missed out, huh?! But if there is an optional DML verb, it would be UPDATE<\/b>, and yet, such functionality is very useful to implement, and get to know more about the XML and Ajax used in the innards of the Message Board project Java and HTML code.<\/p>\n

    We’ve gathered together some source files changed for this UPDATE<\/b> logic and some styling improvements, as follows …<\/p>\n