Just in time creation of Result Set

Question

I have this problem which is bugging me a lot. Actually I want to display some data on the browser by fetching it from the database. Now this result set could be quite big. So i would like to display on multiple pages like if there are 100 rows then 25 rows per page, so in total 4 pages. One way to do this load all data in memory and then display it moving your cursor down, but in this technique u have to keep large amount of data in memory. I want to fetch these rows as required like first time top 25 rows, next time next 25 rows and so on. I am stuck.. Please help me!!

Answer 1

//you could use a Select bean:
private com.ibm.ivj.db.uibeans.Select getSelectSQL() {
     if (ivjSelectSQL == null) {
          try {
               ivjSelectSQL = new com.ibm.ivj.db.uibeans.Select();
               ivjSelectSQL.setReadOnly(true);
               ivjSelectSQL.setQuery(new com.ibm.ivj.db.uibeans.Query               ivjSelectSQL.setQuery(new com.ibm.ivj.db.uibeans.Query(getMyCon(), sqlGeneral()));
          } catch (java.lang.Throwable ivjExc) {
               handleException(ivjExc);
     return ivjSelectSQL;
          ivjScrollPaneTableGen.setModel(getSelectSQL());
          ivjScrollPaneTableGen.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
ivjScrollPaneTableGen.setAutoCreateColumnsFromModel(true);
          getSelectSQL().execute();
// after this your table will contain automatically all the rows.
how the NextPage should work I haven't done yet, but I saw there is a setViewport(JViewport) function in JScrollPane class which seems to do the thing that you want.