Problems with the resultset

Question

hello
i have a servlet that connects to a db. Data is passed back in the resultset. But only for one of my columns(if i specify it in my select statement)- i want the resultset to pass back the column that the user has selected(this is via a variable called 'type')!
But i get an exception of type:
java.lang.ArrayIndexOutofBoundsException
Heres my code:
query = "select '"+type+"' from caravan_charges where..........
Resultset result = stmt.executeQuery(query);
int count = 0;
while(result.next()) {
count += result.getInt(1);
can anyone help!!!

Answer 1

check the variable query and check the SQL statement. But the error relate to an array most probably where the code result.getInt(1);. Check my code below. by getting the column count will surely avoid the outofbounds array error.
SQLResult = StatementSQL.executeQuery(sql);
if (!SQLResult.next()) {
     JOptionPane.showMessageDialog(null, "No rows retrieved.\nPlease check SQL script.");
     JTable emptyTable = new JTable(dataVector, headerVector);
     resultTableScroller.setViewportView(emptyTable);
else {
     ResultSetMetaData mdSQL = SQLResult.getMetaData();
     int colCount = mdSQL.getColumnCount();
     //get column names here
     for (int i = 1; i <= colCount; i++) {
          String colName = mdSQL.getColumnName(i);
          colName.trim();
          headerVector.addElement(colName);
     do {
          Vector rowVector = new Vector();
          for (int i = 1; i <= colCount; i++) {
               String colName = mdSQL.getColumnName(i);
               colName.trim();
               rowVector.addElement(SQLResult.getString(colName));
          dataVector.addElement(rowVector);
     } while (SQLResult.next());