Error in reading from excel file

Question

hi,
I have written a program which reads from excel file
and based on the value of the column i have to do something.
Everything is fine but when i run it, it produces an error message
Exception: For input string: "851.0"
the value 851.0 is acually the value of the first column.
Here is the code and i hope someone can help me to find the solution
try{
                           Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                           Connection con = DriverManager.getConnection( "jdbc:odbc:exceltest" );
                           Statement st = con.createStatement();
                           ResultSet rs = st.executeQuery( "Select * from [Sheet1$] " );
                           ResultSetMetaData rsmd = rs.getMetaData();
                           int numberOfColumns = rsmd.getColumnCount();
                           while (rs.next()) {
                                        for (int i = 1; i <= numberOfColumns; i++) {
                                             if(i==1){
                                                        String columnValue1 = rs.getString(i);
                                                        custNo =Integer.parseInt(columnValue1);
                                                       // System.out.println(columnValue1);     
                                                        found=search(custNo);
                                                        if (found==false)
                                                             insert(custNo);
                                                        System.out.println(columnValue1);     
                                             else if (i == numberOfColumns && found==false)
                                                       String columnValue = rs.getString(i);
                                                       if(columnValue=="a")
                                                            incrementCusta();
                                                       else if (columnValue=="b")
                                                            incrementCustB();
                                                       else if(columnValue=="c")
                                                            incrementCustc();
                                                       else if(columnValue=="d")
                                                            incrementCustId();
                                        System.out.println("");     
                                   st.close();
                                   con.close();
                                  } catch(Exception ex) {
                                       System.err.print("Exception: ");
                                       System.err.println(ex.getMessage());
                             }

Answer 1

Maybe 851.0 is float value, not string.
Try Object columnValue1 =
rs.getObject(i); instead of String
columnValue1 = rs.getString(i);
You are absolutely right i actually change the line
custNo =Integer.parseInt(columnValue1);
into
custNo =Double.parseDouble(columnValue1);
Thanks alot :)