Why do I keep on getting an exception-illegal operation on ResultSet?
Here is the code:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/*
* SearchParts.java
*
* Created on 08-Mar-2010, 12:14:31
*/
package garits;
import java.sql.*;
import javax.swing.*;
/**
*
* @author Deniz
*/
public class SearchParts extends javax.swing.JFrame {
/** Creates new form SearchParts */
public SearchParts() {
initComponents();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
if (!jTextField1.getText().equals("")) {
String result = "";
int Partnumber = Integer.parseInt(jTextField1.getText());
DB db = new DB();
try {
db.connect();
String query = "Select * from Stock Where Part_no =" + "'" + jTextField1.getText() + "'";
ResultSet rs = db.execSQL(query);
if (rs.equals(null)) {
PartNotFound nf = new PartNotFound();
nf.setVisible(true);
} else {
ResultSetMetaData rsmd = rs.getMetaData();
int numberOfColumns = rsmd.getColumnCount();
int RowCount = 0;
for (int i = 1; i < numberOfColumns; i++) {
rs.getString(i);
result += i + "/n";
}
if (!result.equals("")) {
Receptionist_FranchiseePartFound part = new Receptionist_FranchiseePartFound();
part.setVisible(true);
while (rs.next()) {
RowCount++;
}
part.getTable().addRowSelectionInterval(0, RowCount);
} else {
PartNotFound nf = new PartNotFound();
}
}
} catch (Exception e) {
e.printStackTrace();
JOptionPane.showMessageDialog(jButton1, "More information needed for search", "Error Message", JOptionPane.ERROR_MESSAGE);
}
} else if (!jTextField2.getText().equals("")) {
String result = "";
DB db = new DB();
try {
db.connect();
String query = "Select * from Stock Where Part_name =" + "'" + jTextField2.getText() + "'";
ResultSet rs = db.execSQL(query);
if (rs.equals(null)) {
PartNotFound nf = new PartNotFound();
nf.setVisible(true);
} else {
ResultSetMetaData rsmd = rs.getMetaData();
int numberOfColumns = rsmd.getColumnCount();
int RowCount = 0;
for (int i = 1; i < numberOfColumns; i++) {
rs.getString(i);
result += i + "/n";
}
// Receptionist_FranchiseePartFound part = new Receptionist_FranchiseePartFound();
// part.setVisible(true);
if (!result.equals("")) {
Receptionist_FranchiseePartFound part = new Receptionist_FranchiseePartFound();
part.setVisible(true);
while (rs.next()) {
RowCount++;
}
part.getTable().addRowSelectionInterval(0, RowCount);
} else {
PartNotFound nf = new PartNotFound();
nf.setVisible(true);
}
}
} catch (Exception e) {
e.printStackTrace();
JOptionPane.showMessageDialog(jButton1, "More information needed for search", "Error Message", JOptionPane.ERROR_MESSAGE);
}
} else if (jTextField1.getText().equals("") && jTextField2.getText().equals("")) {
String result = "";
DB db = new DB();
try {
db.connect();
String query = "Select * from Stock Where Manufacturer =" + "'" + jTextField3.getText() + "'AND Vehicle_type ='" + jTextField4.getText() + "'";
ResultSet rs = db.execSQL(query);
if (rs.equals(null)) {
PartNotFound nf = new PartNotFound();
nf.setVisible(true);
}
else{
ResultSetMetaData rsmd = rs.getMetaData();
int numberOfColumns = rsmd.getColumnCount();
int RowCount = 0;
for (int i = 1; i < numberOfColumns; i++) {
rs.getString(i);
result += i + "/n";
}
// Receptionist_FranchiseePartFound part = new Receptionist_FranchiseePartFound();
// part.setVisible(true);
if (!result.equals("")) {
Receptionist_FranchiseePartFound part = new Receptionist_FranchiseePartFound();
part.setVisible(true);
while (rs.next()) {
RowCount++;
}
part.getTable().addRowSelectionInterval(0, RowCount);
} else {
PartNotFound nf = new PartNotFound();
nf.setVisible(true);
}
}
} catch (Exception e) {
e.printStackTrace();
JOptionPane.showMessageDialog(jButton1, "More information needed for search", "Error Message", JOptionPane.ERROR_MESSAGE);
}
} else if (jTextField3.getText().equals("") || jTextField4.getText().equals("")) {
JOptionPane.showMessageDialog(jButton1, "More information needed for search", "Error Message", JOptionPane.ERROR_MESSAGE);
}
}
/**
* @param args the command line arguments
*/
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel jLabel5;
private javax.swing.JLabel jLabel6;
private javax.swing.JLabel jLabel7;
private javax.swing.JLabel jLabel8;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
private javax.swing.JTextField jTextField3;
private javax.swing.JTextField jTextField4;
// End of variables declaration
}
You always need to call next() on the ResultSet, before accessing it. If not, the pointer points to the row before the first. You do this with while-loops in your code, but some places you dont, which generates an error:
Ohh, and as another poster mentions, you dont assign the result to a variable, so the rs.getString(i) call has no effect. But this is probably your source of error.