the error goes like this:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'order (custNo, dateOrder, totalPayable) VALUES ('', '2012/Feb/19 16:09:02', '0' at line 1

// HELP T_T. this project is to be passed this tuesday and im workin with this since friday. sigh :((

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.mysql.jdbc.Connection;
import java.sql.*;
import java.util.Calendar;
import java.text.SimpleDateFormat;

public class order extends JFrame {
    JLabel c;
    JLabel prodna1;
    JLabel qtty;
    JTextField tf_string;
    JTextField gqty;
    JButton verify;
    //JLabel date1;
    JTextField cusno;
    JComboBox prodna;
    JComboBox combobox_3;
    JLabel label_7;
    JButton ok;
    JButton cancel;
    String url = "jdbc:mysql://localhost/group1a";
    Connection conn = null;
    String username = "root", password = "";
    String query = "SELECT * FROM customer";
    String query2 = "SELECT * FROM products";
    Statement stmt = null;
    ResultSet rs = null;

    public order() {

        Calendar currentDate = Calendar.getInstance();
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy/MMM/dd HH:mm:ss");
        final String dateNow = formatter.format(currentDate.getTime());

        orderLayout customLayout = new orderLayout();

        getContentPane().setFont(new Font("Helvetica", Font.PLAIN, 12));
        getContentPane().setLayout(customLayout);

        c = new JLabel("Customer No:");    //label
        getContentPane().add(c);

        prodna1 = new JLabel("Product Name:");  //label
        getContentPane().add(prodna1);

        qtty = new JLabel("Quantity:");  //label
        getContentPane().add(qtty);

        tf_string = new JTextField(""); //textfield
        getContentPane().add(tf_string);

        verify = new JButton("→");  //button
        getContentPane().add(verify);


        cusno = new JTextField("");  //label
        getContentPane().add(cusno);

        try
         {
            Class.forName("com.mysql.jdbc.Driver").newInstance();
            conn = (Connection) DriverManager.getConnection(url,username,password);
            //System.out.println("DBMS Connection Established");
            stmt = (Statement) conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
            rs = stmt.executeQuery(query2);

          }

         catch(Exception e)
         {
            System.out.println("DBMS Connection Error");
            e.printStackTrace();
         }

        try{   
            //combobox sa products
            rs.last();
            int i = rs.getRow();
            String [] v = new String [i];
            rs.beforeFirst();
            i = 0;
            while(rs.next())
            {
                v[i] = rs.getString(2);
                i++;

            }
             prodna = new JComboBox(v);
        }
        catch(Exception e)
        {

        }
        getContentPane().add(prodna);

        gqty = new JTextField("");
        getContentPane().add(gqty);

        label_7 = new JLabel("Customer Search:");  //label
        getContentPane().add(label_7);

        ok = new JButton("OK");     //button
        getContentPane().add(ok);

        cancel = new JButton("Cancel"); //button
        getContentPane().add(cancel);

        setSize(getPreferredSize());



        try{
           //Class.forName("com.mysql.jdbc.Driver");
           //final Connection con = (Connection) DriverManager.getConnection(url,username,password);

           //final Statement stat = (Statement) con.createStatement();
           final PreparedStatement s = null;
           final int b = 0;
           //s = con.prepareStatement("INSERT INTO order (orderNo,custNo, dateOrder, totalPayable) VALUES (?,?,?,?)");
           final String cNo = cusno.getText();
           final String proNa = (String) prodna.getSelectedItem();
           //String qnty = dateNow;

           ok.addActionListener(new ActionListener(  ) { @Override
                public void actionPerformed(ActionEvent ae) {

                        try {
                        try {
                            //stat.executeUpdate("INSERT INTO customer "+"(custNa,contact,email,address) "+" VALUES('"+cusName.getText()+"','"+contact.getText()+"','"+email.getText()+"','"+addr.getText()+"')");
                            //s.executeUpdate("INSERT INTO order " + "(custNo,dateOrder,totalPayable) " + " VALUES('" + cNo + "','" + dateNow + "','" + b + "')");
                            //ResultSet rsp = stat.executeQuery("SELECT prodNo, qty, unitPrice FROM products WHERE prodNa = '"+prodna.getSelectedItem()+"'");
                            //s.setString(1, null);
                            //s.setString(3, dateNow);
                            //s.setString(2, cNo);
                            //s.setInt(4, b);
                            //s.executeUpdate();
                            //s.close();
                            //s.executeQuery("SELECT prodNo, qty, unitPrice FROM products WHERE prodNa = 'proNa'");
                            Class.forName("com.mysql.jdbc.Driver");
                            Connection conn = (Connection) DriverManager.getConnection(url,username,password);
                            Statement st = conn.createStatement();
                            st.executeUpdate("INSERT INTO order " + " (custNo, dateOrder, totalPayable) " + " VALUES ('"+cNo+"', '"+dateNow+"', '"+b+"')");
                            conn.close();
                        } catch (ClassNotFoundException ex) {
                            Logger.getLogger(order.class.getName()).log(Level.SEVERE, null, ex);
                        }
                       
                        
                        } catch (SQLException ex) {
                             Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
                        }

                            JOptionPane.showMessageDialog(null,"" + prodna.getSelectedItem() + ", " + gqty.getText(), "Records has been ADDED", JOptionPane.INFORMATION_MESSAGE);
                            setVisible(false);
                            newOrder n = new newOrder();
                            n.setVisible(true);
                            n.setLocation(500, 200);
            }


                });
        }catch(Exception e){
            System.out.println("DBMS Connection ERROR");
            e.printStackTrace();
        } finally{
            if(conn != null){
                try{
                    System.out.println("DBMS Connection Terminated");
                }catch(Exception e){

                }
            }
        }




        cancel.addActionListener(new ActionListener(  )
       {
           public void actionPerformed(ActionEvent e)
           {
                setVisible(false);
                newOrder n = new newOrder();
                n.setVisible(true);
                n.setLocation(500, 200);
           }

       });

       verify.addActionListener(new ActionListener(  )
        {
            public void actionPerformed(ActionEvent ae)
            {

           try
            {
                Class.forName("com.mysql.jdbc.Driver").newInstance();
                conn = (Connection) DriverManager.getConnection(url,username,password);
                System.out.println("DBMS Connection Established");
                //stmt = conn.createStatement();
                stmt = (Statement) conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
                rs = stmt.executeQuery(query);
            }

            catch(Exception e)
            {
                System.out.println("DBMS Connection Error");
                e.printStackTrace();
            }
                    boolean flag = false;

                    try
                    {

                        rs.beforeFirst();


                        while (rs.next())
                        {
                            String no = rs.getString(1);
                            //String no = rs.getString("custNo");
                            String name = rs.getString("custNa");
                            String email = rs.getString("email");
                            String contact = rs.getString("contact");

                            if (name.equalsIgnoreCase(tf_string.getText().trim()))
                            {
                                 JOptionPane.showMessageDialog(null, no+"\n"+name+"\n"+email+"\n"+contact, "Search Result", JOptionPane.INFORMATION_MESSAGE);
                                 flag = true;
                                 break;
                            }
                        }

                        if(flag==false)
                            JOptionPane.showMessageDialog(null, tf_string.getText()+" not found", "Search Result", JOptionPane.INFORMATION_MESSAGE);

                    }

                    catch (Exception e)
                    {
                          e.printStackTrace();
                    }
            }

        });


    addWindowListener(new WindowAdapter(  )
    {
      public void windowClosing(WindowEvent we)
      {

        if(conn != null)
        {
            try
            {
              rs.close();
              stmt.close();
              conn.close();
              System.out.println("DBMS Connection Terminated");
              //System.exit(0);

             }
            catch(Exception e)
             {
               e.printStackTrace();
             }
         }

                setVisible(false);
                newOrder n = new newOrder();
                n.setVisible(true);
                n.setLocation(500, 200);
      }
    });

           cancel.addActionListener(new ActionListener(  )
        {
            public void actionPerformed(ActionEvent ae)
            {
                 if(conn != null)
        {
            try
            {
              rs.close();
              stmt.close();
              conn.close();
              System.out.println("DBMS Connection Terminated");
             }
            catch(Exception e)
             {
               e.printStackTrace();
             }
         }

          //System.exit(0);
                setVisible(false);
                newOrder n = new newOrder();
                n.setVisible(true);
                n.setLocation(500, 200);
      }
    });


    }

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'order (custNo, dateOrder, totalPayable) VALUES ('', '2012/Feb/19 16:09:02', '0' at line 1

The error message says it all..

The syntax of the sql query is not correct.
Make sure the syntax is correct and try again.
First , execute it on database command prompt and see whether it works. Then place the same query in your java code.

Is totalPayable a varchar or some numeric type?

@OP Hint: Type query "desc tablename" on your sql command prompt . It will display all the attributes and datatypes of the table.

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